CN106904903B - A kind of gradient type porous concrete product and preparation method thereof - Google Patents
A kind of gradient type porous concrete product and preparation method thereof Download PDFInfo
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- CN106904903B CN106904903B CN201710031962.7A CN201710031962A CN106904903B CN 106904903 B CN106904903 B CN 106904903B CN 201710031962 A CN201710031962 A CN 201710031962A CN 106904903 B CN106904903 B CN 106904903B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/023—Fired or melted materials
- C04B18/025—Grog
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0038—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter
- C04B38/0041—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter the particulate matter having preselected particle sizes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The present invention provides a kind of gradient type porous concrete product and preparation method thereof, the raw material of porous concrete product include that the weight ratio of composite aggregate, cementitious material, compound additive and water is 2.5~3.5:1:0.003~0.03:0.25~0.35, and composite aggregate is made of recycled aggregate and lightweight aggregate.Porous concrete product prepared by the present invention has the water penetration of different gradients, permeability rate diversification, and prepared porous concrete product performance is stablized, during the preparation process easy vibration compacting.The 28d compression strength of porous concrete product prepared by the present invention is 10~20MPa, permeability rate is 0.5~10mm/s.And construction technology can simplify using gradient type porous concrete product of the invention, engineering construction can disposably be completed according to actual requirement of engineering, and can get and identical technical effect of constructing several times in the prior art.
Description
Technical field
The present invention relates to technical field of concrete, and in particular to a kind of gradient type porous concrete product and its preparation side
Method.
Background technique
With the development of concrete technology, maintaining ecological balance and realization sustainable development are also chasing after for the field of building materials
Seek target.Porous concrete product is also known as celluar concrete, can also claim to drain concrete.As a kind of environmental protection, ecotypic road
Pipeline material has water penetration, can comparatively fast eliminate road, square ponding, mitigates municipal drainage burden；Rainwater can be made to rapidly permeate into ground
Under, recharge of groundwater keeps soil moisture, safeguards the ecological balance of underground water and soil；It is connect in terms of absorbing heat with heat storage function
It is bordering on the ground that natural vegetation is covered, adjusts the temperature and humidity of city space, alleviates urban heat land effect；Make with sound-absorbing
With ambient noise can be reduced；Gap can be adsorbed urban pollutant (such as dust), and dust pollution is reduced；Possess serial color scheme,
It can be needed to be designed pattern according to ambient enviroment, there is stronger dicoration, be that tradition mats formation cannot with general water-permeable brick
The special pavement material realized.In short, porous concrete product is a kind of conservation of nature, maintaining ecological balance, alleviates Urban Thermal
The excellent new technology of island effect, is conducive to the benign development of living environment.
Since porous concrete product technology develops also immature, porous concrete product product presence in the prior art
Permeability rate is single, vibrating is not easy the defects of closely knit, properties of product differ greatly, construction quality warranty issues are prominent, seriously affects
The popularization and application of the porous concrete product technology.Furthermore it when being used for making pervious concrete pavement in the prior art, needs
Construction twice (road surfaces of different permeability rates in order to obtain), i.e., first in one layer of biggish concrete of permeability rate of bottom construction, this is mixed
The partial size of solidifying soil aggregate is also correspondingly larger；Again in one layer of lesser concrete of permeability rate of upper surface construction, this concrete is corresponding
Aggregate size is also smaller；Such arrangement and method for construction needs to construct in two times, thus its operating efficiency is low, construction technology is cumbersome, engineering into
It spends slower, at high cost.In addition, producing a large amount of construction waste concrete rubbish with the transformation of urban construction, how effectively locating
Managing the construction waste concrete rubbish is also the environmental problem that urgently we solve.If can these be discarded with building waste progress
Regeneration, not only save the cost reduce building waste and clear and processing cost, also can reduce the pollution to environment.
Accordingly, it is desirable to provide a kind of be directed to the insufficient improved technology scheme of the above-mentioned prior art.
Summary of the invention
That there are permeability rates the purpose of the present invention is overcoming above-mentioned prior art porous concrete product is single, vibrates that it is close to be not easy
It is real, properties of product differ greatly, construction quality warranty issues are prominent, construction technology is cumbersome and it is at high cost the defects of, propose one kind
Gradient type porous concrete product and preparation method thereof.Technical solution of the present invention is using construction waste concrete as Regenerated Bone
Material production permeable concrete, this is a kind of permeable concrete with recycled aggregate substitution natural coarse aggregate, this ecological
Porous concrete product not only increases the use approach of discarded concrete high added value, reduces natural aggregate exploitation quantity,
Reduce the cost for preparing seepy material；Porous concrete product prepared by the present invention has the water penetration of different gradients, and institute
The porous concrete product performance of preparation is stablized, during the preparation process easy vibration compacting, and preparation method is simple, easy to operate.
To achieve the goals above, the invention provides the following technical scheme:
A kind of gradient type porous concrete product, the raw material of the porous concrete product include composite aggregate, gelling
Material, compound additive and water, and the composite aggregate, cementitious material, the weight ratio of compound additive and water are 2.5~3.5:
1:0.003~0.03:0.25~0.35.
In gradient type porous concrete product as described above, it is preferable that the composite aggregate is by recycled aggregate and lightweight aggregate
Composition, and the recycled aggregate and lightweight aggregate are that the ratio of 1:1 is mixed into the composite aggregate by volume.
In gradient type porous concrete product as described above, it is preferable that the recycled aggregate is that construction waste concrete adds
Partial size made from work is 5mm~10mm, apparent density is not less than 2500kg/m3Simple grain grade recycled aggregate；The lightweight aggregate is
Partial size is 3mm~5mm, bulk density is not more than 1000kg/m3Artificial porcelain granule；Preferably, the recycled aggregate and described light
Aggregate is the aggregate of saturated dry surface；Preferably, the processing of the construction waste concrete includes broken, sieving washing etc.
Processing.
In gradient type porous concrete product as described above, it is preferable that the production technology of lightweight aggregate includes following steps:
(1) prepared by curing agent, by weight by 35~40 parts of blast furnace granulated slag, 30~45 parts of red mud, 25~35 parts of lime, desulfurized gypsum 1~4
Part after mixing, is aged 4 hours, dry；(2) the dry material of above-mentioned ageing is subjected to grinding, being screened into fineness is
The curing agent powder of 0.09mm；(3) by weight by 25~35 parts of above-mentioned curing agent powder, 55~75 parts of silt and water 10~14
Part is stirred, after glomeration of spraying water, and is placed in still kettle at 1.0~1.2MPa after steam pressure hydration reaction 8 hours, is down to room
Lightweight aggregate is made in temperature.
In gradient type porous concrete product as described above, it is preferable that the cementitious material is by portland cement, flyash
It is formed with miberal powder, and the portland cement, the flyash, the miberal powder are 6~8:1~2:1~2 ratio by weight
It is mixed into the cementitious material.
In gradient type porous concrete product as described above, it is preferable that the portland cement is 42.5 grades or 52.5 grades
Portland cement；The flyash is the flyash of II grades or II grades ratings above；The miberal powder is S95 or S95 ratings above
Miberal powder.
In gradient type porous concrete product as described above, it is preferable that the compound additive by water-reducing agent, thickener,
Retarder and early strength agent composition；And the water-reducing agent, the thickener, the retarder and the early strength agent are 4 by weight
~6:1~3:0.5~3:0.1~0.5 ratio is mixed into the compound additive.
In gradient type porous concrete product as described above, it is preferable that the water-reducing agent is polycarboxylic acids dehydragent, described
Thickener is cellulose thickener, and the retarder is glucose retarder, and the early strength agent is that triethanolamine class is early strong
Agent；Preferably, the water-reducing rate of the polycarboxylate water-reducer is 20%~40%；The thickener is carboxymethyl cellulose thickening
Agent.
The preparation method of a kind of as above any gradient type porous concrete product, the preparation method includes following
Step:
1) after weighing composite aggregate, cementitious material, water and compound additive according to required proportion and it is added to blender
In, high-speed stirred is uniform, obtains mixture；
2) in the mixture injection mold obtained step 1), and the mixture height injected should be higher by mold height；Institute
The bottom surface for stating mold is provided with several piercing holes；
3) mold for being loaded with mixture for obtaining step 2) is placed on progress jolt ramming molding on shake table；
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
In preparation method as described above, it is preferable that in step 2), the piercing hole is round hole, the hole of the round hole
Diameter is 1~2mm, pitch-row is 2~4mm；Preferably, the aperture of the round hole be 1mm, pitch-row 2mm；More preferably, multiple
The bottom surface of the mold is arranged in matrix structure for the round hole.
In preparation method as described above, it is preferable that in step 2), when slip casting, mixture height is higher by mold height
10%~20%.
In preparation method as described above, it is preferable that in step 3), the length of specific jolt ramming time need to combine concrete mixing
The state of object and specific surface state determine；After jolt ramming, the mixture of die surface is subjected to floating processing.Preferably,
The jolt ramming time is 30s.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect:
1, the present invention makes permeable concrete using construction waste concrete as recycled aggregate, this is one kind to regenerate
Aggregate substitutes the permeable concrete of natural coarse aggregate, and this ecological porous concrete product not only increases discarded concrete
The use approach of high added value reduces natural aggregate exploitation quantity, reduces the cost for preparing seepy material.Skill of the invention
Art scheme is at low cost, and discarded concrete can be made to be effectively addressed, and solves environmental problem, has significant economy and environment
Property.
2, porous concrete product prepared by the present invention has the water penetration of different gradients, and permeability rate diversification as has
There is size fractionated aggregate and is in the gradient type porous concrete product of upper and lower double-layer structure (there are two different permeability rates for tool), and
Prepared porous concrete product performance is stablized, during the preparation process easy vibration compacting.Pervious concrete prepared by the present invention
The 28d compression strength of product is 10~20MPa, permeability rate is 0.5~10mm/s.
3, preparation method of the invention is simple, easy to operate；During jolt ramming, lightweight aggregate can be vibrated due to light weight
To upper layer, and recycled aggregate will move down, so that the gradient type for having size fractionated aggregate and being in upper and lower double-layer structure will be formed
Porous concrete product；Furthermore the part of cement slurry during jolt ramming in mixture will move down, but due to the technology of the present invention side
There are several piercing holes to avoid cement slurry so that cement slurry be made not assemble in mold bottom surface for mold bottom surface used by case
In mold bottom surface, aggregation will affect the permeable effect of entirety of concrete.
4, in the prior art in making pervious concrete pavement, the road surface of different permeability rates, needs twice in order to obtain
Or repeatedly construction, construction technology is cumbersome, higher cost；And it can simplify using gradient type porous concrete product of the invention
Construction technology is disposably completed engineering construction according to actual requirement of engineering, and be can get and phase of constructing several times in the prior art
Same technical effect.
Detailed description of the invention
Mold structure diagram in Fig. 1 embodiment of the present invention；
In figure: 1, mold；2, piercing hole；3, stabilizer blade；4, side wall；5, bottom surface.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff's every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the features in the embodiments and the embodiments of the present application be can be combined with each other.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the present invention rather than require the present invention that must be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.Term used in the present invention " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected,
It may be a detachable connection；It can be directly connected, can also be indirectly connected by intermediate member, for the common of this field
For technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figure 1, the embodiment of the present invention provides a kind of die for preparation 1 of gradient type porous concrete product, mold 1
Including side wall 4, bottom surface 5 and stabilizer blade 3；Stabilizer blade 3 is mounted on the lower part of bottom surface 5, and the top of bottom surface 5 is arranged in multiple side walls 4, preferably
Ground, side wall 4 and bottom surface 5 in the present embodiment form mold 1 (the no top surface, i.e. parallel surface corresponding with bottom surface 5 position of rectangular shape
Set the inlet that place is concrete mix).Water in order to make concrete mix during jolt ramming is molding, in mixture
Slurry body will not assemble (the permeable effect of entirety that cement slurry will will affect concrete in the aggregation of 1 bottom surface 5 of mold in 1 bottom surface 5 of mold
Fruit), therefore the bottom surface 5 of the mold 1 in the present embodiment is provided with several piercing holes 2, avoids cement slurry in 1 bottom surface 5 of mold
Aggregation influences the defect of the permeable effect of entirety of concrete.Preferably, the piercing hole 2 in mold 1 is round hole, the hole of round hole
Diameter is 1~2mm (such as: 1mm, 1.2mm, 1.3mm, 1.5mm, 1.6mm, 1.8mm), pitch-row be 2~4mm (such as: 2.2mm,
2.3mm,2.8mm,3.0mm,3.5mm,3.8mm)；And the bottom surface 5 of mold 1 is arranged in matrix structure for multiple round holes
On.Shape, the size of mold 1 in the present invention can be set according to requirement of engineering, and the present invention no longer limits this.
The embodiment of the present invention provides a kind of gradient type porous concrete product, and the raw material of porous concrete product include multiple
Close aggregate, cementitious material, compound additive and water, and composite aggregate, cementitious material, the weight ratio of compound additive and water are
2.5~3.5 (such as: 2.6,2.8,2.9,3.0,3.1,3.2,3.3,3.4): 1:0.003~0.03 (such as: 0.004,
0.005,0.008,0.010,0.015,0.020,0.025,0.028): 0.25~0.35 (such as: 0.26,0.27,0.28,
0.29、0.30、0.32、0.33、0.34)。
Gradient type porous concrete product of the invention refers to size fractionated aggregate and in upper and lower double-layer structure, thus
Make its upper layer and lower layer that there is different permeability rates, technical solution of the present invention can solve the single permeability rate of single concrete product
Problem.In general, the aggregate size of concrete is bigger, and permeability rate is bigger.The tool of porous concrete product prepared by the present invention
There is different permeability rates, illustrate herein, the data of permeability rate according to the present invention are detection porous concrete product upper layer
Structure sheaf where the lesser lightweight aggregate of permeability rate, i.e. partial size.Lower layer's aggregate size of the present invention is bigger than upper layer aggregate size, lower layer
Permeability rate it is bigger than upper layer permeability rate, to form the porous concrete product of gradient type.
Composite aggregate is made of recycled aggregate and lightweight aggregate in the embodiment of the present invention, and recycled aggregate and lightweight aggregate press volume
Than being mixed into composite aggregate for the ratio of 1:1.It is preferred that it is 5mm that recycled aggregate, which is partial size made from construction waste concrete is processed,
~10mm (such as: 6mm, 7mm, 8mm, 9mm), apparent density are not less than 2500kg/m3Simple grain grade recycled aggregate；Lightweight aggregate is
Partial size is 3mm~5mm (such as: 3.5mm, 4.0mm, 4.2mm, 4.7mm), bulk density is not more than 1000kg/m3Artificial pottery
Grain.Further preferably, recycled aggregate and lightweight aggregate are the aggregate of saturated dry surface.
Further preferably, recycled aggregate is discarded concrete partial size 5mm~10mm (example after broken, sieving washing process
Particle such as: 6.5mm, 7.2mm, 8.3mm, 9.4mm).
Further preferably, the production technology of lightweight aggregate includes following steps: (1) prepared by curing agent, by weight by blast furnace
35~40 parts of grain slag (such as: 36 parts, 37 parts, 38 parts, 39 parts), 30~45 parts of red mud (such as: 32 parts, 36 parts, 40 parts, 42
Part), 25~35 parts of lime (such as: 27 parts, 29 parts, 32 parts, 34 parts), 1~4 part of desulfurized gypsum (such as: 2 parts, 2.5 parts, 3 parts,
3.5 parts) after mixing, it is aged 4 hours, it is dry；(2) the dry material of above-mentioned ageing is subjected to grinding, being screened into fineness is
The curing agent powder of 0.09mm；(3) by weight by 25~35 parts of above-mentioned curing agent powder (such as: 27 parts, 28 parts, 31 parts, 33
Part), 10~14 parts of 55~75 parts of silt (such as: 57 parts, 60 parts, 65 parts, 70 parts) and water (such as: 11 parts, 12 parts, 13 parts,
13.5 parts) it is stirred, after glomeration of spraying water, it is placed in still kettle at 1.0~1.2MPa after steam pressure hydration reaction 8 hours,
It is down to room temperature and lightweight aggregate is made.
Cementitious material is made of portland cement, flyash and miberal powder in the embodiment of the present invention, and portland cement, fine coal
Ash, miberal powder be by weight 6~8 (such as: 6.2,6.5,6.7,7.0,7.1,7.4,7.8): 1~2 (such as: 1.2,1.5,
1.7,1.8,1.9): 1~2 (such as: 1.1, ratio 1.3,1.5,1.7,1.8,1.9) is mixed into cementitious material.It is preferred that silicic acid
Salt cement is 42.5 grades or 52.5 grades of portland cements；Flyash is the flyash of II grades or II grades ratings above；Miberal powder is S95
Or the miberal powder of S95 ratings above.
Compound additive is made of water-reducing agent, thickener, retarder and early strength agent in the embodiment of the present invention；And water-reducing agent,
Thickener, retarder and early strength agent be by weight 4~6 (such as: 4.2,4.5,4.8,5.0,5.2,5.6,5.8,5.9): 1~
3 (such as: 1.2,1.4,1.7,2.0,2.4,2.7,2.9): 0.5~3 (such as: 0.6,0.8,0.9,1.2,1.6,1.8,2.0,
2.2,2.5,2.7,2.95): 0.1~0.5 (such as: 0.15,0.18,0.20,0.25,0.28,0.31,0.34,0.38,0.40,
0.42,0.45,0.46,0.49) ratio is mixed into compound additive.It is preferred that water-reducing agent is polycarboxylic acids dehydragent, thickener
For cellulose thickener, retarder is glucose retarder, and early strength agent is triethanolamine class early strength agent.Further preferably, poly- carboxylic
The water-reducing rate of acids water-reducing agent is 20%~40%.
Wherein, the thickening mechanism of cellulose thickener is hydrophobic main chain and surrounding water molecules by hydrogen bond association, is improved
The fluid volume of polymer itself, reduces the movable space of Particle free, to improve system viscosity.It can also pass through
The raising of viscosity is realized in the winding of strand, is shown as having high viscosity in static and low sheraing, is under high shear low-viscosity.This
When being because of static or low shearing speed, cellulose molecular chain is in disordered state and makes system that high viscosity be presented；And it is cut in height
When cutting speed is spent, molecule is parallel to flow direction and makees ordered arrangement, is easy to mutually slide, so system viscosity declines.It is further excellent
Choosing, cellulose thickener is carboxymethyl cellulose.
Embodiment 1
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step:
1) multiple by recycled aggregate 750kg, lightweight aggregate 500kg, portland cement 300kg, flyash 60kg, miberal powder 60kg
Additive 12kg is closed, after water 110kg is weighed and is added in blender, high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made of recycled aggregate and lightweight aggregate, and recycled aggregate and lightweight aggregate are 1:1's by volume
Ratio is mixed into composite aggregate.Recycled aggregate is the simple grain grade that construction waste concrete processes that partial size obtained is 5mm~10mm
Recycled aggregate；Lightweight aggregate is the artificial porcelain granule that partial size is 3~5mm.Recycled aggregate and lightweight aggregate are the bone of saturated dry surface
Material.
Compound additive is made of water-reducing agent, thickener, retarder and early strength agent；And water-reducing agent, thickener, retarder and
Early strength agent is 5:2:1:0.4 by weight.
2) mixture in step 1) is injected in mold, and the mixture height injected should be higher by mold height 10%
(it prepares for mixture jolt ramming sinking, it is few to prevent the mix object amount in injection mold and cannot fill when jolt ramming is sunk entire
Mould inside space)；The bottom surface of mold is provided with several piercing holes；Piercing hole is round hole, the aperture of round hole be 1mm,
Pitch-row is 2mm；And multiple round holes are arranged on the bottom surface of mold in matrix structure；
3) mold that mixture is loaded in step 2) is placed on progress jolt ramming molding on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper layer due to light weight, and recycled aggregate will move down, to have size fractionated for being formed
Aggregate and be in upper and lower double-layer structure gradient type porous concrete product；Furthermore the part of cement during jolt ramming in mixture
Slurry will move down, but since mold bottom surface has several piercing holes, so that cement slurry be made not assemble in mold bottom surface；Cement
It starches and assembles the permeable effect of entirety that will will affect concrete in mold bottom surface；
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
5) the gradient type porous concrete product in step 4) is conserved to 28d, surveying its permeability rate is 3.9mm/s, is resisted
Compressive Strength is 19.6MPa.
Embodiment 2
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step:
1) multiple by recycled aggregate 750kg, lightweight aggregate 500kg, portland cement 300kg, flyash 60kg, miberal powder 60kg
Additive 8.5kg is closed, after water 125kg is weighed and is added in blender, high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made of recycled aggregate and lightweight aggregate, and recycled aggregate and lightweight aggregate are 1:1's by volume
Ratio is mixed into composite aggregate.Recycled aggregate is the simple grain grade that construction waste concrete processes that partial size obtained is 5mm~10mm
Recycled aggregate；Lightweight aggregate is the artificial porcelain granule that partial size is 3~5mm.Recycled aggregate and lightweight aggregate are the bone of saturated dry surface
Material.
Compound additive is made of water-reducing agent, thickener, retarder and early strength agent；And water-reducing agent, thickener, retarder and
Early strength agent is 4:3:3:0.3 by weight.
2) mixture in step 1) is injected in mold, and the mixture height injected should be higher by mold height 15%
(it prepares for mixture jolt ramming sinking, it is few to prevent the mix object amount in injection mold and cannot fill when jolt ramming is sunk entire
Mould inside space)；The bottom surface of mold is provided with several piercing holes；Piercing hole is round hole, and the aperture of round hole is
1.5mm, pitch-row 2mm；And multiple round holes are arranged on the bottom surface of mold in matrix structure；
3) mold that mixture is loaded in step 2) is placed on progress jolt ramming molding on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper layer due to light weight, and recycled aggregate will move down, to have size fractionated for being formed
Aggregate and be in upper and lower double-layer structure gradient type porous concrete product；Furthermore the part of cement during jolt ramming in mixture
Slurry will move down, but since mold bottom surface has several piercing holes, so that cement slurry be made not assemble in mold bottom surface；Cement
It starches and assembles the permeable effect of entirety that will will affect concrete in mold bottom surface；
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
5) the gradient type porous concrete product in step 4) is conserved to 28d, surveying its permeability rate is 4.3mm/s, is resisted
Compressive Strength is 16.1MPa.
Embodiment 3
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step:
1) multiple by recycled aggregate 750kg, lightweight aggregate 500kg, portland cement 290kg, flyash 45kg, miberal powder 75kg
Additive 7.5kg is closed, after water 130kg is weighed and is added in blender, high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made of recycled aggregate and lightweight aggregate, and recycled aggregate and lightweight aggregate are 1:1's by volume
Ratio is mixed into composite aggregate.Recycled aggregate is the simple grain grade that construction waste concrete processes that partial size obtained is 5mm~10mm
Recycled aggregate；Lightweight aggregate is the artificial porcelain granule that partial size is 3~5mm.Recycled aggregate and lightweight aggregate are the bone of saturated dry surface
Material.
Compound additive is made of water-reducing agent, thickener, retarder and early strength agent；And water-reducing agent, thickener, retarder and
Early strength agent is 6:1:2:0.5 by weight.
2) mixture in step 1) is injected in mold, and the mixture height injected should be higher by mold height 20%
(it prepares for mixture jolt ramming sinking, it is few to prevent the mix object amount in injection mold and cannot fill when jolt ramming is sunk entire
Mould inside space)；The bottom surface of mold is provided with several piercing holes；Piercing hole is round hole, the aperture of round hole be 2mm,
Pitch-row is 3mm；And multiple round holes are arranged on the bottom surface of mold in matrix structure；
3) mold that mixture is loaded in step 2) is placed on progress jolt ramming molding on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper layer due to light weight, and recycled aggregate will move down, to have size fractionated for being formed
Aggregate and be in upper and lower double-layer structure gradient type porous concrete product；Furthermore the part of cement during jolt ramming in mixture
Slurry will move down, but since mold bottom surface has several piercing holes, so that cement slurry be made not assemble in mold bottom surface；Cement
It starches and assembles the permeable effect of entirety that will will affect concrete in mold bottom surface；
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
5) the gradient type porous concrete product in step 4) is conserved to 28d, surveying its permeability rate is 5.1mm/s, is resisted
Compressive Strength is 11.6MPa.
Embodiment 4
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step:
1) multiple by recycled aggregate 750kg, lightweight aggregate 500kg, portland cement 280kg, flyash 50kg, miberal powder 70kg
Additive 7.2kg is closed, after water 140kg is weighed and is added in blender, high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made of recycled aggregate and lightweight aggregate, and recycled aggregate and lightweight aggregate are 1:1's by volume
Ratio is mixed into composite aggregate.Recycled aggregate is discarded concrete through particle broken, after sieving washing process.Lightweight aggregate is grain
The artificial porcelain granule of 3~5mm of diameter.Recycled aggregate and lightweight aggregate are the aggregate of saturated dry surface.
Compound additive is made of water-reducing agent, thickener, retarder and early strength agent；And water-reducing agent, thickener, retarder and
Early strength agent is 4.5:2.5:1.5:0.1 by weight.
2) mixture in step 1) is injected in mold, and the mixture height injected should be higher by mold height 18%
(it prepares for mixture jolt ramming sinking, it is few to prevent the mix object amount in injection mold and cannot fill when jolt ramming is sunk entire
Mould inside space)；The bottom surface of mold is provided with several piercing holes；Piercing hole is round hole, the aperture of round hole be 1mm,
Pitch-row is 3.5mm；And multiple round holes are arranged on the bottom surface of mold in matrix structure；
3) mold that mixture is loaded in step 2) is placed on progress jolt ramming molding on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper layer due to light weight, and recycled aggregate will move down, to have size fractionated for being formed
Aggregate and be in upper and lower double-layer structure gradient type porous concrete product；Furthermore the part of cement during jolt ramming in mixture
Slurry will move down, but since mold bottom surface has several piercing holes, so that cement slurry be made not assemble in mold bottom surface；Cement
It starches and assembles the permeable effect of entirety that will will affect concrete in mold bottom surface；
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
5) the gradient type porous concrete product in step 4) is conserved to 28d, surveying its permeability rate is 6.5mm/s, is resisted
Compressive Strength is 10.5MPa.
Embodiment 5
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step:
1) multiple by recycled aggregate 750kg, lightweight aggregate 500kg, portland cement 240kg, flyash 80kg, miberal powder 80kg
Additive 6.5kg is closed, after water 140kg is weighed and is added in blender, high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made of recycled aggregate and lightweight aggregate, and recycled aggregate and lightweight aggregate are 1:1's by volume
Ratio is mixed into composite aggregate.Recycled aggregate is discarded concrete through particle broken, after sieving washing process.Lightweight aggregate is grain
Diameter is the artificial porcelain granule of 3mm~5mm.Recycled aggregate and lightweight aggregate are the aggregate of saturated dry surface.
Compound additive is made of water-reducing agent, thickener, retarder and early strength agent；And water-reducing agent, thickener, retarder and
Early strength agent is 5.5:1.5:0.5:0.35 by weight.
2) mixture in step 1) is injected in mold, and the mixture height injected should be higher by mold height 14%
(it prepares for mixture jolt ramming sinking, it is few to prevent the mix object amount in injection mold and cannot fill when jolt ramming is sunk entire
Mould inside space)；The bottom surface of mold is provided with several piercing holes；Piercing hole is round hole, and the aperture of round hole is
1.8mm, pitch-row 2.6mm；And multiple round holes are arranged on the bottom surface of mold in matrix structure；
3) mold that mixture is loaded in step 2) is placed on progress jolt ramming molding on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper layer due to light weight, and recycled aggregate will move down, to have size fractionated for being formed
Aggregate and be in upper and lower double-layer structure gradient type porous concrete product；Furthermore the part of cement during jolt ramming in mixture
Slurry will move down, but since mold bottom surface has several piercing holes, so that cement slurry be made not assemble in mold bottom surface；Cement
It starches and assembles the permeable effect of entirety that will will affect concrete in mold bottom surface；
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
5) the gradient type porous concrete product in step 4) is conserved to 28d, surveying its permeability rate is 6.8mm/s, is resisted
Compressive Strength is 12.5MPa.
Embodiment 6
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step:
1) multiple by recycled aggregate 750kg, lightweight aggregate 500kg, portland cement 285kg, flyash 65kg, miberal powder 65kg
Additive 10kg is closed, after water 125kg is weighed and is added in blender, high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made of recycled aggregate and lightweight aggregate, and recycled aggregate and lightweight aggregate are 1:1's by volume
Ratio is mixed into composite aggregate.Recycled aggregate is the simple grain grade that construction waste concrete processes that partial size obtained is 5mm~10mm
Recycled aggregate.Recycled aggregate and lightweight aggregate are the aggregate of saturated dry surface.Lightweight aggregate is the artificial porcelain granule of 3~5mm of partial size,
The production technology of its lightweight aggregate includes following steps: (1) curing agent prepare, by weight by 38 parts of blast furnace granulated slag, 40 parts of red mud,
30 parts of lime, 3 parts of desulfurized gypsum after mixing, are aged 4 hours, dry；(2) the dry material of above-mentioned ageing is subjected to powder
Mill is screened into the curing agent powder that fineness is 0.09mm；(3) by weight by 31 parts of above-mentioned curing agent powder, 65 parts of silt and
12 parts of water are stirred, after glomeration of spraying water, and are placed in still kettle at 1.0~1.2MPa after steam pressure hydration reaction 8 hours, drop
Lightweight aggregate is made to room temperature.
Compound additive is made of water-reducing agent, thickener, retarder and early strength agent；And water-reducing agent, thickener, retarder and
Early strength agent is 4.5:2:2.2:0.15 by weight.
2) mixture in step 1) is injected in mold, and the mixture height injected should be higher by mold height 15%
(it prepares for mixture jolt ramming sinking, it is few to prevent the mix object amount in injection mold and cannot fill when jolt ramming is sunk entire
Mould inside space)；The bottom surface of mold is provided with several piercing holes；Piercing hole is round hole, the aperture of round hole be 1mm,
Pitch-row is 2mm；And multiple round holes are arranged on the bottom surface of mold in matrix structure.
3) mold that mixture is loaded in step 2) is placed on progress jolt ramming molding on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper layer due to light weight, and recycled aggregate will move down, to have size fractionated for being formed
Aggregate and be in upper and lower double-layer structure gradient type porous concrete product；Furthermore the part of cement during jolt ramming in mixture
Slurry will move down, but since mold bottom surface has several piercing holes, so that cement slurry be made not assemble in mold bottom surface；Cement
It starches and assembles the permeable effect of entirety that will will affect concrete in mold bottom surface.
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
5) the gradient type porous concrete product in step 4) is conserved to 28d, surveying its permeability rate is 4.2mm/s, is resisted
Compressive Strength is 19.1MPa.
In conclusion the present invention makes permeable concrete using construction waste concrete as recycled aggregate, this is one
With the permeable concrete of recycled aggregate substitution natural coarse aggregate, this ecological porous concrete product not only increases useless kind
The use approach for abandoning concrete high added value reduces natural aggregate exploitation quantity, reduces the cost for preparing seepy material.This
The technical solution of invention is at low cost, and discarded concrete can be made to be effectively addressed, and solves environmental problem, has significant economical
Property and Environmental.
Porous concrete product prepared by the present invention has the water penetration of different gradients, and permeability rate diversification is of the invention
Gradient type porous concrete product refers to size fractionated aggregate and in upper and lower double-layer structure, so that its upper layer and lower layer be made to have
The problem of different permeability rate, technical solution of the present invention can solve single concrete product single permeability rate.And it is prepared
Porous concrete product performance is stablized, during the preparation process easy vibration compacting.Preparation method of the invention is simple, easy to operate；?
During jolt ramming, lightweight aggregate can be vibrated to upper layer due to light weight, and recycled aggregate will move down, so that formation be had
Size fractionated aggregate and be in upper and lower double-layer structure gradient type porous concrete product；Furthermore during jolt ramming in mixture
Part of cement slurry will move down, but the mold bottom surface as used by technical solution of the present invention has several piercing holes, thus
It assemble cement slurry will not in mold bottom surface, cement slurry avoided to will affect the permeable effect of entirety of concrete in the aggregation of mold bottom surface
Fruit.
In addition, the road surface of different permeability rates, needs two in order to obtain in the prior art in making pervious concrete pavement
Secondary or multiple construction, construction technology is cumbersome, higher cost；And use gradient type porous concrete product of the invention can letter
Change construction technology, engineering construction is disposably completed according to actual requirement of engineering, and can get and construct several times in the prior art
Identical technical effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Mind and principle within, any modification, equivalent replacement, improvement and so on, accompanying claims protection scope of the present invention it
It is interior.
Claims (11)
1. a kind of gradient type porous concrete product, which is characterized in that the raw material of the porous concrete product include compound
Aggregate, cementitious material, compound additive and water, and the composite aggregate, cementitious material, the weight ratio of compound additive and water are
2.5~3.5:1:0.003~0.03:0.25~0.35；
The compound additive is made of water-reducing agent, thickener, retarder and early strength agent；The water-reducing agent, the thickener, institute
State retarder and the early strength agent to be by weight that 4~6:1~3:0.5~3:0.1~0.5 ratio is mixed into described compound outer
Add agent；
The composite aggregate is made of recycled aggregate and lightweight aggregate, and the recycled aggregate and lightweight aggregate are 1:1's by volume
Ratio is mixed into the composite aggregate；
The recycled aggregate is that construction waste concrete processes that partial size obtained is 5mm~10mm, apparent density is not less than
2500kg/m3Simple grain grade recycled aggregate；The lightweight aggregate is that partial size is 3mm~5mm, bulk density no more than 1000kg/m3's
Artificial porcelain granule.
2. gradient type porous concrete product as described in claim 1, which is characterized in that the recycled aggregate and the light bone
Material is the aggregate of saturated dry surface.
3. gradient type porous concrete product as described in claim 1, which is characterized in that the cementitious material is by silicate cement
Mud, flyash and miberal powder composition, and the portland cement, the flyash, the miberal powder are 6~8:1~2:1 by weight
~2 ratio is mixed into the cementitious material.
4. gradient type porous concrete product as claimed in claim 3, which is characterized in that the portland cement is 42.5 grades
Or 52.5 grades of portland cements；The flyash is the flyash of II grades or II grades ratings above；The miberal powder is S95 or S95
The miberal powder of ratings above.
5. gradient type porous concrete product as described in claim 1, which is characterized in that the water-reducing agent subtracts for polycarboxylic acid
Aqua, the thickener are cellulose thickener, and the retarder is glucose retarder, and the early strength agent is three ethyl alcohol
Amine early strength agent.
6. gradient type porous concrete product as claimed in claim 5, which is characterized in that the diminishing of the polycarboxylate water-reducer
Rate is 20%~40%；The thickener is carboxymethyl cellulose thickener.
7. a kind of preparation method of any gradient type porous concrete product of claim 1~6, which is characterized in that institute
State preparation method the following steps are included:
1) it after weighing composite aggregate, cementitious material, water and compound additive according to required proportion and is added in blender, it is high
Speed stirs evenly, and obtains mixture；
2) in the mixture injection mold obtained step 1), and the mixture height injected should be higher by mold height；The mould
The bottom surface of tool is provided with several piercing holes；
3) mold for being loaded with mixture for obtaining step 2) is placed on progress jolt ramming molding on shake table；
4) mixture after molding of jolt ramming in step 3) is conserved, demoulding, obtains gradient type porous concrete product.
8. preparation method as claimed in claim 7, which is characterized in that in step 2), the piercing hole is round hole, the circle
The aperture in shape hole is 1~2mm, pitch-row is 2~4mm.
9. preparation method as claimed in claim 8, which is characterized in that the aperture of the round hole is 1mm, pitch-row 2mm.
10. preparation method as claimed in claim 8, which is characterized in that multiple round holes are arranged in matrix structure
In the bottom surface of the mold.
11. preparation method as claimed in claim 7, which is characterized in that in step 2), when slip casting, the high depanning of mixture height
Has the 10%~20% of height.
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| CN108275909A (en) * | 2018-02-08 | 2018-07-13 | 韶关学院 | A kind of cement base porous pavement meterial additive and its application |
| CN108409250A (en) * | 2018-04-25 | 2018-08-17 | 广西理工职业技术学院 | The method for preparing green pervious concrete using tailing |
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| CN104402339A (en) * | 2014-11-20 | 2015-03-11 | 天元建设集团有限公司 | Pervious concrete and construction method thereof |
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| CN104402339A (en) * | 2014-11-20 | 2015-03-11 | 天元建设集团有限公司 | Pervious concrete and construction method thereof |
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