CN108585662A - A kind of lightweight pervious concrete people walking along the street face brick and preparation method thereof - Google Patents
A kind of lightweight pervious concrete people walking along the street face brick and preparation method thereof Download PDFInfo
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- CN108585662A CN108585662A CN201810536459.1A CN201810536459A CN108585662A CN 108585662 A CN108585662 A CN 108585662A CN 201810536459 A CN201810536459 A CN 201810536459A CN 108585662 A CN108585662 A CN 108585662A
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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
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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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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- 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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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention provides a kind of lightweight pervious concrete people walking along the street face brick, belongs to building material technical field.Include each component of following mass percent：Ground slag 20~30%, cement 5~10%, flyash 5~10%, pottery sand 15~30%, river sand 0~10%, exciting agent 2~4%, accumulation of salt in the surface soil inhibitor 3~5%, physical blowing agent 0.1~0.3%, chemical foaming agent 2~4%, manganese dioxide 1~3%, potassium carbonate 2~4%, water-reducing agent 1~3%, water 15~25%.The present invention also provides the preparation methods of people's walking along the street face brick.Lightweight pervious concrete people's walking along the street face brick that the present invention develops, the method for using stage physics and chemical cooperated foaming for the first time, it first passes through physical blowing agent and forms a large amount of airtight air vent in intrinsic silicon, then adjacent stomata is connected to by the lasting air-entraining effect of chemical foaming agent again, to form a large amount of interconnected pore in inside concrete.Product of the present invention has preferable permeable and water storage performance, has wide popularizing application prospect.
Description
Technical field
The invention belongs to building material technical field, specially a kind of lightweight pervious concrete people's walking along the street face brick and its preparation
Method.
Background technology
" sponge city " is a kind of new city storm water man- agement concept that country proposes in recent years, it is desirable that anti-in municipal drainage
Ensure that rainwater in urban inner infiltration, delay and purification, allows rainwater to be fully used on the basis of flood, realizes that city is good
Property water cycle, achieve the purpose that improve ecological protection.Pervious concrete is built with its efficient water permeability and " sponge city "
If theory high fit, it is developing progressively the primary base material built for " sponge city ".But current permeable coagulation
Soil is mainly permeable to achieve the purpose that by the mutual interlocking formation hole of internal aggregate, and the storage capacity of material itself is limited,
And there is extremely strong water storage performance containing a large amount of uniform, closed bubbles inside foam concrete, if technological means pair can be passed through
It carries out trepanning processing, and foam concrete will certainly become a kind of ideal permeable pavement material.
Chinese patent CN201611207725 discloses a kind of water penetration foam concrete, by the raw material system of following parts by weight
At：160-420 parts of cement, 0.2-0.4 parts of foaming agent, 2-5 parts of water-reducing agent, 1-5 parts of swelling agent, 1-5 parts of plasticiser and water 90-
150 parts.The technological means that the invention is taken is by adding some flocculants for destroying pore structure, the foam of formation being flocculated
Come, bad foam structure is drawn, to the purpose in the company of realization hole.It should be pointed out that in above-mentioned patent document, flocculant is
High-molecular organic material, these organic polymers are extremely difficult in foaming agent to be uniformly dispersed, and precipitation is easily precipitated in the later stage, therefore
Only achieve the effect that even hole purpose is extremely limited by flocculant.
Chinese patent CN201710257565 discloses a kind of permeable foam concrete and preparation method thereof, by following weight
Part raw material composition：45-55 parts of cement, 5-8 parts of ultra fine sand, 20-35 parts of water, 8-15 parts of admixture, 3-8 parts of foam, fiber 0.1-
0.5 part, 0.01-0.05 parts of cellulose ether, 0.1-0.4 parts of water-reducing agent.The technological means that the invention is taken is in foam concrete
Crude fibre of the incorporation with large-size in matrix so that the abscess of foam concrete is formed using fiber as the intercommunicating pore of conduit
Road.But in above-mentioned patent document, fiber is mixed in the display direction of foam concrete intrinsic silicon meeting strong influence foam
The percent opening for coagulating rustic bubble is less than desired effect so as to cause the water permeability of foam concrete.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of lightweight pervious concrete people's walking along the street face brick and
Preparation method, pervious concrete people walking along the street face brick of the present invention have high-strength light, permeable and good water storage performance excellent
Point.
The object of the invention is achieved through the following technical solutions：
A kind of lightweight pervious concrete people walking along the street face brick, includes each component of following mass percent：Ground slag 20~
30%, cement 5~10%, flyash 5~10%, pottery sand 15~30%, river sand 0~10%, exciting agent 2~4%, the accumulation of salt in the surface soil inhibit
Agent 3~5%, chemical foaming agent 2~4%, manganese dioxide 1~3%, potassium carbonate 2~4%, subtracts physical blowing agent 0.1~0.3%
Aqua 1~3%, water 15~25%.
As an a kind of specific embodiment of lightweight pervious concrete people walking along the street face brick of the present invention, including following matter
Measure each component of percentage：Ground slag 23~27%, cement 7~9%, flyash 6~8%, pottery sand 20~25%, river sand 4
~7%, exciting agent 3~4%, accumulation of salt in the surface soil inhibitors 4~5%, physical blowing agent 0.2~0.25%, chemical foaming agent 3~3.5%,
Manganese dioxide 2~3%, potassium carbonate 3~4%, water-reducing agent 2~3%, water 20~25%.
As an a kind of specific embodiment of lightweight pervious concrete people walking along the street face brick of the present invention, the levigate mine
Slag is S95 grades of miberal powders, 420~450m of specific surface area2/ kg, 28d activity index are not less than 98%；The flyash is I grade of fine coal
Ash, 45 μm of screen over-sizes are no more than 10%, and water demand ratio is not more than 93%, and the pottery sand is shale pottery, and bulk density 700~
800kg/m3, maximum particle diameter 2.36mm；The river sand maximum particle diameter 0.6mm, fineness modulus 0.8~1.0, clay content is no more than
1.0%.
As an a kind of specific embodiment of lightweight pervious concrete people walking along the street face brick of the present invention, by quality percentage
Than meter, the exciting agent includes waterglass 70~80%, and the plaster of paris 20~30%, the sum of each component is 100%.Further, institute
The modulus for stating waterglass is 1.2~1.5.Using waterglass as exciting agent, by adjusting the SiO in waterglass2/Na2O's rubs
That number ratio (i.e. modulus), can be such that the Si-O keys in ground slag are quickly broken, and a large amount of activity ≡ is formed in slurry
Si-O- groups, to significantly improve the hydration activity of ground slag, compound a certain amount of plaster of paris of incorporation not only can be with mill
The hydrated calcium silicate gel reaction that thin slag and hydrated cementitious generate generates suitable ettringite, and the presence of these crystalline phases can
Play the role of micro-aggregate, the shrinkage cracking problem of slurry is effectively relieved, is additionally incorporated the plaster of paris, can also increase in slurry
Free calcium ions content, to improve the hydration rate of cement and ground slag early stage.
As an a kind of specific embodiment of lightweight pervious concrete people walking along the street face brick of the present invention, by quality percentage
Than meter, the accumulation of salt in the surface soil inhibitor includes zeolite 50~100%, bentonite 0~40%, diatomite 0~50%, and the sum of each component is
100%.
As an a kind of specific embodiment of lightweight pervious concrete people walking along the street face brick of the present invention, the zeolite is
5A zeolites, apertureThe bentonite be calcium-base bentonite, 35~40me/100g of sucking amount, colloid index 60~
70ml/15g, smectite content 55~65%；SiO in the diatomite2Content is not less than 90%.
5A zeolites, calcium-base bentonite and diatomite are all some porous or stratiform substances, have extremely strong adsorption capacity
Or ion-exchange capacity.Calcium ion wherein in 5A zeolites can with the Free alkali metal sodium ion that is introduced by exciting agent in slurry into
Row ion-exchange reactions and be fixed, and calcium-base bentonite and diatomite can largely be inhaled due to it with extremely strong adsorption capacity
Attached free sodium ion, three are added by a certain percentage, can effectively inhibit the phenomenon that the accumulation of salt in the surface soil frosting of brick body surface occurs, improve its table
See effect.
As an a kind of specific embodiment of lightweight pervious concrete people walking along the street face brick of the present invention, by quality percentage
Than meter, the physical blowing agent include sodium lauroyl glutamate 0~100%, sodium sulfate of polyethenoxy ether of fatty alcohol 0~100%,
Lauryl sodium sulfate 0~100%, the sum of each component are 100%.
As an a kind of specific embodiment of lightweight pervious concrete people walking along the street face brick of the present invention, the chemistry hair
Infusion is hydrogen peroxide；The water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid, and solid content 12.5~14.0%, water-reducing rate is not less than
25%.
Potassium carbonate is added, the calcium hydroxide that can be not only generated with hydrated cementitious, which reacts, generates the carbonic acid of slightly solubility
Calcium, outside the setting time for significantly shortening cement, moreover it is possible to reduce the freezing point of water and promote the low temperature hydrated of cement, to improve brick body
Early strength and anti-freezing property.
The present invention also provides a kind of preparation methods of lightweight pervious concrete people walking along the street face brick, include the following steps：
1) each raw material is weighed by mass percent shared by raw material；
2) by cement, ground slag, flyash, pottery sand, river sand, exciting agent, accumulation of salt in the surface soil inhibitor, manganese dioxide, potassium carbonate,
Water-reducing agent, water are mixed until forming distributed slurry；
3) foam is made in physical blowing agent, and directly by foam injection step 2 in foaming process) obtained by equal refining
It is stirred evenly in slurry, until physical blowing agent foaming finishes；
4) chemical foaming agent is added in foam concrete obtained by step 3) and is stirred evenly, chemical foaming agent is made uniformly to divide
It dissipates in foam concrete, foam concrete of the mix after uniform is injected into pattern, stands demoulding to get lightweight pervious concrete
People's walking along the street face brick.
As an a kind of specific embodiment of the preparation method of lightweight pervious concrete people walking along the street face brick of the present invention,
Foam is made using compressed air method in the physical blowing agent.
As an a kind of specific embodiment of the preparation method of lightweight pervious concrete people walking along the street face brick of the present invention,
In step 2), the stir speed (S.S.) is 100~200r/min；In step 3), the stir speed (S.S.) is 60~80r/min；Step
4) in, the stir speed (S.S.) is 40~60r/min, 25~40s of mixing time.
It, can be according to requirement of engineering, by adjusting each according to lightweight pervious concrete people's walking along the street face brick prepared by said program
The relative amount of component realizes that density, the intensity of brick body are adjustable, meets the requirement of road surface difference pavement performance.
The method that the present invention uses stage physics and chemical cooperated foaming for the first time.First pass through lauroyl glutamate,
The anionic surfactant such as alkyl sulfate form a large amount of homogeneous bubble in intrinsic silicon, due to this kind of surfactant
Generated bubble membranous wall is thin, and the stability of foam is poor, and especially in the strong alkali environment of the present invention, bubble, which is easily vanished, to be formed
Part connects hole.Hydrogen peroxide is added, so that its last decomposition under the catalytic action of manganese dioxide is generated oxygen, and in the pressure of oxygen
Further stomata is got through under force effect, to form a large amount of interconnected pore in inside concrete so that foam concrete
Show preferable permeable and water storage performance.
Compared with prior art, the invention has the advantages that：
1, energy conservation and environmental protection.Present invention employs the glue material systems of alkali-slag, mainly using industrial solid castoff slag as
Cementitious material, cement consumption is low, energy conservation and environmental protection.After mixing the substances such as zeolite, bentonite and diatomite, its ion exchange spy is utilized
Property and absorption property, can effectively inhibit the phenomenon that the accumulation of salt in the surface soil frosting of brick body surface occurs, improve its apparent effect.
2, permeable and water storage performance is good.It, can be big using the method for stage physics and chemical cooperated foaming in the present invention
The connection porosity of the raising foam concrete of amplitude, increases the average pore size of foam concrete, compared with common pervious concrete,
The present invention has both water storage performance while with water permeability.
3, density and intensity are adjustable.The present invention can adjust the relative amount of each component according to the pavement performance on road surface, realize
The density of brick body is in 600~1500kg/m3, it is adjustable in 2~18MPa of intensity.
4, it has a extensive future.The coefficient of permeability of people's walking along the street face brick of the present invention reaches as high as 1.4mm/s, water-retaining property highest
Up to 2.8g/cm2, water penetration and water storage performance are that current pavement water-permeable brick is ideal far above the requirement of the standard of water-permeable brick
Alternative materials, have wide popularizing application prospect.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
A kind of lightweight pervious concrete people walking along the street face brick provided by the invention, by ground slag, cement, flyash, pottery sand,
River sand, exciting agent, accumulation of salt in the surface soil inhibitor, physical blowing agent, chemical foaming agent, manganese dioxide, potassium carbonate, water-reducing agent and water it is compound and
At specific formula is shown in Table 1.Each raw material component can be bought from market and obtain, or obtain raw material using corresponding preparation method
Component can also, the preparation method of each component is also conventional for those skilled in the art.
1 lightweight pervious concrete people's walking along the street face brick of table matches (by percentage to the quality)
Remarks：SHG-sodium lauroyl glutamate；SAES-sodium sulfate of polyethenoxy ether of fatty alcohol；SDS-dodecyl sulphur
Sour sodium.
The embodiment of the present invention needs the various raw materials of precise according to the ratio, weighing error that must be less than 1%；In following embodiment
Unless specific instructions, the reagent or raw material are commercial reagent or industrial products.
In following embodiment, the cement is Chongqing Bishan Ji east P.O42.5R cement, and the ground slag is that Chongqing is long
The macro S95 grades of miberal powder of Shou Yu, 420~450m of specific surface area2/ kg, 28d activity indexs 98%, the flyash are Chongqing Jiangjin Luo
I grade of flyash of semi-annular jade pendant, 45 μm of screen over-sizes 8%, water demand ratio 91%, the pottery sand bulk density are 800kg/m3, maximum particle diameter
2.36mm, the river sand maximum particle diameter 0.6mm, fineness modulus 0.9, clay content 0.8%, the 5A zeolite pores areIt is described
Calcium-base bentonite sucking amount 37me/100g, colloid index 64ml/15g, smectite content 58%, the diatomite SiO2Content
91%.
Embodiment 1
In the present embodiment lightweight pervious concrete people's walking along the street face brick, alkali-activator is by waterglass (modulus 1.3) and ripe
Gypsum in mass ratio 4:1 adjusts and mixes, and accumulation of salt in the surface soil inhibitor is 100%5A zeolites, physical blowing agent 100%SHG, and using
It is preceding the SHG powder weighed in proportion must be made into a concentration of 0.3% foaming agent solution it is for use；The pottery sand weighed, which need to soak, to be reached
Saturated dry surface.
The preparation process of the present embodiment lightweight pervious concrete people's walking along the street face brick is as follows：
1) raw material weighs, and mass percent is shared by each raw material：Ground slag 25%, cement 10%, flyash 10%, pottery
Sand 15%, river sand 5%, alkali-activator 2%, accumulation of salt in the surface soil inhibitor 5%, physical blowing agent 0.2%, chemical foaming agent 2%, dioxy
Change manganese 1%, potassium carbonate 4%, water-reducing agent 1%, water 19.8%.
2) by ground slag, cement, flyash, pottery sand, river sand, alkali-activator, accumulation of salt in the surface soil inhibitor, manganese dioxide, carbon
Sour potassium, water-reducing agent and water, which are placed in agitated kettle, to stir evenly, and obtains uniform sizing material, stir speed (S.S.) 150r/min.
3) physical blowing agent (SHG) solution is foamed using compressed air method, directly injects foam in foaming process
It is stirred evenly in uniform sizing material obtained by step 2), stir speed (S.S.) 60r/min, until physical blowing agent foaming finishes.
4) chemical foaming agent weighed is added in foam concrete obtained by step 3) and is stirred evenly, stir speed (S.S.) is
Foam concrete of the mix after uniform is injected pattern, stands demoulding to get of the present invention by 50r/min, mixing time 30s
Lightweight pervious concrete people's walking along the street face brick.
In the present embodiment, lightweight pervious concrete people's walking along the street face brick Absolute Dry Density of preparation is 1000kg/m3, 28d resistance to compressions
Intensity is 11.6MPa, coefficient of permeability 0.98mm/s, water-retaining property 1.8g/cm2。
Embodiment 2
In the present embodiment lightweight pervious concrete people's walking along the street face brick, alkali-activator is by waterglass (modulus 1.2) and ripe
Gypsum in mass ratio 3:1 tune is mixed, and accumulation of salt in the surface soil inhibitor is by 5A zeolites and calcium-base bentonite in mass ratio 3:2 tune are mixed, object
Haircut infusion be 100%SAES, and using it is preceding the SAES powder weighed in proportion must be made into a concentration of 0.3% foaming agent
Solution for later use；The pottery sand weighed, which need to soak, reaches saturated dry surface.
The preparation process of the present embodiment lightweight pervious concrete people's walking along the street face brick is as follows：
1) raw material weighs, and mass percent is shared by each raw material：Ground slag 30%, cement 10%, flyash 10%, pottery
Sand 5%, river sand 10%, alkali-activator 4%, accumulation of salt in the surface soil inhibitor 5%, physical blowing agent 0.1%, chemical foaming agent 2%, dioxy
Change manganese 1%, potassium carbonate 2%, water-reducing agent 3%, water 17.9%.
2) by ground slag, cement, flyash, pottery sand, river sand, alkali-activator, accumulation of salt in the surface soil inhibitor, manganese dioxide, carbon
Sour potassium, water-reducing agent and water, which are placed in agitated kettle, to stir evenly, and obtains uniform sizing material, stir speed (S.S.) 150r/min.
3) physical blowing agent (SAES) solution is foamed using compressed air method, directly injects foam in foaming process
It is stirred evenly in gained uniform sizing material, stir speed (S.S.) 80r/min, until physical blowing agent foaming finishes.
4) chemical foaming agent weighed is added in foam concrete obtained by step 3) and is stirred evenly, stir speed (S.S.) is
Foam concrete of the mix after uniform is injected pattern, stands demoulding to get of the present invention by 50r/min, mixing time 30s
Lightweight pervious concrete people's walking along the street face brick.
In the present embodiment, lightweight pervious concrete people's walking along the street face brick Absolute Dry Density of preparation is 1500kg/m3, 28d resistance to compressions
Intensity is 18.0MPa, coefficient of permeability 0.65mm/s, water-retaining property 1.0g/cm2。
Embodiment 3
A kind of lightweight pervious concrete people walking along the street face brick, the alkali-activator is by waterglass (modulus 1.2) and ripe stone
Cream in mass ratio 7:3 tune are mixed, and accumulation of salt in the surface soil inhibitor is by 5A zeolites and diatomite in mass ratio 1:1 tune is mixed, physical blowing
Agent is 100%SDS, and is waited for using preceding a concentration of 0.3% foaming agent solution of must being made into the SDS powder weighed in proportion
With；The pottery sand weighed, which need to soak, reaches saturated dry surface.
The preparation process of the present embodiment lightweight pervious concrete people's walking along the street face brick is as follows：
1) raw material weighs, and mass percent is shared by each raw material：Ground slag 25%, cement 5%, flyash 5%, pottery sand
25%, alkali-activator 2%, accumulation of salt in the surface soil inhibitor 3%, physical blowing agent 0.3%, chemical foaming agent 4%, manganese dioxide 3%, carbon
Sour potassium 4%, water-reducing agent 1%, water 22.7%.
2) by ground slag, cement, flyash, pottery sand, alkali-activator, accumulation of salt in the surface soil inhibitor, manganese dioxide, potassium carbonate,
Water-reducing agent and water, which are placed in agitated kettle, to stir evenly, and obtains uniform sizing material, stir speed (S.S.) 100r/min.
3) physical blowing agent (SDS) solution is foamed using compressed air method, directly injects foam in foaming process
It is stirred evenly in gained uniform sizing material, stir speed (S.S.) 60r/min, until physical blowing agent foaming finishes.
4) chemical foaming agent weighed is added in foam concrete obtained by step 3) and is stirred evenly, stir speed (S.S.) is
Foam concrete of the mix after uniform is injected pattern, stands demoulding to get of the present invention by 50r/min, mixing time 30s
Lightweight pervious concrete people's walking along the street face brick.
In the present embodiment, lightweight pervious concrete people's walking along the street face brick Absolute Dry Density of preparation is 600kg/m3, 28d pressure resistances
Degree is 2.3MPa, coefficient of permeability 1.4mm/s, water-retaining property 2.8g/cm2。
Embodiment 4
A kind of lightweight pervious concrete people walking along the street face brick, the alkali-activator is by waterglass (modulus 1.5) and ripe stone
Cream in mass ratio 4:1 tune is mixed, and accumulation of salt in the surface soil inhibitor is by 5A zeolites, calcium-base bentonite and diatomite in mass ratio 5:2:3 tune are mixed
It forms, physical blowing agent SHG, SAES and SDS in mass ratio 6:2:2 tune are mixed, and will must in proportion be weighed using preceding
Physical blowing agent composite powder be made into a concentration of 0.3% foaming agent solution it is for use；The pottery sand weighed, which need to soak, reaches saturation plane
Dry state.
The preparation process of the present embodiment lightweight pervious concrete people's walking along the street face brick is as follows：
1) raw material weighs, and mass percent is shared by each raw material：Ground slag 25%, cement 10%, flyash 5%, pottery
Sand 22%, alkali-activator 3%, accumulation of salt in the surface soil inhibitors 4 %, physical blowing agent 0.2%, chemical foaming agent 3%, manganese dioxide 2%,
Potassium carbonate 4%, water-reducing agent 1%, water 20.8%.
2) by ground slag, cement, flyash, pottery sand, alkali-activator, accumulation of salt in the surface soil inhibitor, manganese dioxide, potassium carbonate,
Water-reducing agent and water, which are placed in agitated kettle, to stir evenly, and obtains uniform sizing material, stir speed (S.S.) 100r/min.
3) by physical blowing agent solution using compressed air method foam, in foaming process directly by foam inject obtained by
It is stirred evenly in homogenate material, stir speed (S.S.) 70r/min, until physical blowing agent foaming finishes.
4) chemical foaming agent weighed is added in foam concrete obtained by step 3) and is stirred evenly, stir speed (S.S.) is
Foam concrete of the mix after uniform is injected pattern, stands demoulding to get of the present invention by 40r/min, mixing time 30s
Lightweight pervious concrete people's walking along the street face brick.
In the present embodiment, lightweight pervious concrete people's walking along the street face brick Absolute Dry Density of preparation is 800kg/m3, 28d pressure resistances
Degree is 3.2MPa, coefficient of permeability 1.1mm/s, water-retaining property 2.2g/cm2。
In order to protrude the novelty of the present invention, above-described embodiment 1 has been carried out comparative analysis by spy.
Comparative example 1
Physical blowing agent is not added in this comparative example, dosage and the embodiment 1 of remaining each key component are consistent, physics
The dosage of foaming agent is replaced with water.
The preparation process of this comparative example lightweight pervious concrete people's walking along the street face brick is as follows：
1) raw material weighs, and mass percent is shared by each raw material：Ground slag 25%, cement 10%, flyash 10%, pottery
Sand 15%, river sand 5%, alkali-activator 2%, accumulation of salt in the surface soil inhibitor 5%, chemical foaming agent 2%, manganese dioxide 1%, potassium carbonate
4%, water-reducing agent 1%, water 20%.
2) by ground slag, cement, flyash, pottery sand, river sand, alkali-activator, accumulation of salt in the surface soil inhibitor, manganese dioxide, carbon
Sour potassium, water-reducing agent and water, which are placed in agitated kettle, to stir evenly, and obtains uniform sizing material, stir speed (S.S.) 150r/min.
3) chemical foaming agent weighed is added in slurry obtained by step 2) and is stirred evenly, stir speed (S.S.) 50r/min,
Concrete of the mix after uniform is injected pattern, stands demoulding by mixing time 30s.
In this comparative example, lightweight pervious concrete people's walking along the street face brick Absolute Dry Density of preparation is 1580kg/m3, 28d resistance to compressions
Intensity is 17.6MPa, coefficient of permeability 0mm/s, water-retaining property 0.3g/m2。
Comparative example 2
Physical blowing agent is incorporated into cementitious material in the form of powder in this comparative example, i.e., does not pass through compressed air method
Foaming, but foamed by stirring.Each component dosage is consistent with embodiment 1.
The preparation process of this comparative example lightweight pervious concrete people's walking along the street face brick is as follows：
1) raw material weighs, and mass percent is shared by each raw material：Ground slag 25%, cement 10%, flyash 10%, pottery
Sand 15%, river sand 5%, alkali-activator 2%, accumulation of salt in the surface soil inhibitor 5%, physical blowing agent 0.2%, chemical foaming agent 2%, dioxy
Change manganese 1%, potassium carbonate 4%, water-reducing agent 1%, water 19.8%.
2) by ground slag, cement, flyash, pottery sand, river sand, physical blowing agent, alkali-activator, accumulation of salt in the surface soil inhibitor,
Manganese dioxide, potassium carbonate, water-reducing agent and water, which are placed in agitated kettle, to stir evenly, and obtains foam concrete slurry, and stir speed (S.S.) is
150r/min。
3) chemical foaming agent weighed is added in foam concrete obtained by step 2) and is stirred evenly, stir speed (S.S.) is
Foam concrete of the mix after uniform is injected pattern, stands demoulding by 50r/min, mixing time 30s.
In this comparative example, lightweight pervious concrete people's walking along the street face brick Absolute Dry Density of preparation is 1230kg/m3, 28d resistance to compressions
Intensity is 13.4MPa, coefficient of permeability 0.73mm/s, water-retaining property 1.0g/cm2。
Comparative example 3
Chemical foaming agent is first added in this comparative example, adds physical blowing agent, that is, exchanges the addition sequence of the two.Each group
Point dosage is consistent with embodiment 1.
The preparation process of this comparative example lightweight pervious concrete people's walking along the street face brick is as follows：
1) raw material weighs, and mass percent is shared by each raw material：Ground slag 25%, cement 10%, flyash 10%, pottery
Sand 15%, river sand 5%, alkali-activator 2%, accumulation of salt in the surface soil inhibitor 5%, physical blowing agent 0.2%, chemical foaming agent 2%, dioxy
Change manganese 1%, potassium carbonate 4%, water-reducing agent 1%, water 19.8%.
2) by ground slag, cement, flyash, pottery sand, river sand, alkali-activator, accumulation of salt in the surface soil inhibitor, manganese dioxide, carbon
Sour potassium, water-reducing agent and water, which are placed in agitated kettle, to stir evenly, and obtains uniform sizing material, stir speed (S.S.) 150r/min.
3) chemical foaming agent weighed is added in slurry obtained by step 2) and is stirred evenly, stir speed (S.S.) 50r/min,
Mixing time 30s.
4) physical blowing agent (SHG) solution is foamed using compressed air method, directly injects foam in foaming process
It is stirred evenly in slurry obtained by step 3), stir speed (S.S.) 60r/min, until physical blowing agent foaming finishes.Mix is uniform
Foam concrete afterwards injects pattern, stands demoulding.
In this comparative example, lightweight pervious concrete people's walking along the street face brick Absolute Dry Density of preparation is 1050kg/m3, 28d resistance to compressions
Intensity is 12.1MPa, coefficient of permeability 0.87mm/s, water-retaining property 1.4g/cm2。
It can be seen that from comparative example 1~3：1. when being added without physical blowing agent (comparative example 1), the Absolute Dry Density of brick body is remote
Much larger than embodiment 1, and almost without intercommunicating pore inside brick body, the coefficient of permeability for being embodied in brick body is 0 (almost impermeable
Water), water-retaining property is very poor.2. when physical blowing agent is added in the form of powder in slurry (comparative example 2), due to physics at this time
The bubbling efficiency of foaming agent foams far below air compression method, and the Absolute Dry Density of brick body is significantly greater than embodiment 1, and brick body is saturating
Aqueous and water-retaining property is deteriorated.3. after exchanging the sequence of physical blowing and chemical blowing (comparative example 3), although to the over dry of brick body
Effects of Density is little, but significantly affects the connection porosity of brick body, and coefficient of permeability and the water-retaining property for being embodied in brick body are apparent
Reduce.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of lightweight pervious concrete people walking along the street face brick, which is characterized in that include each component of following mass percent：It is levigate
Slag 20~30%, cement 5~10%, flyash 5~10%, pottery sand 15~30%, river sand 0~10%, exciting agent 2~4%,
Accumulation of salt in the surface soil inhibitor 3~5%, physical blowing agent 0.1~0.3%, chemical foaming agent 2~4%, manganese dioxide 1~3%, potassium carbonate 2
~4%, water-reducing agent 1~3%, water 15~25%.
2. a kind of lightweight pervious concrete people walking along the street face brick as described in claim 1, which is characterized in that the ground slag is
S95 grades of miberal powders, 420~450m of specific surface area2/ kg, 28d activity index are not less than 98%；The flyash is I grade of flyash,
45 μm of screen over-sizes are no more than 10%, and water demand ratio is not more than 93%, and the pottery sand is shale pottery, and bulk density 700~
800kg/m3, maximum particle diameter 2.36mm；The river sand maximum particle diameter 0.6mm, fineness modulus 0.8~1.0, clay content is no more than
1.0%.
3. a kind of lightweight pervious concrete people walking along the street face brick as described in claim 1, which is characterized in that by mass percentage,
The exciting agent includes waterglass 70~80%, and the plaster of paris 20~30%, the sum of each component is 100%, the wherein mould of waterglass
Number is 1.2~1.5.
4. a kind of lightweight pervious concrete people walking along the street face brick as described in claim 1, which is characterized in that by mass percentage,
The accumulation of salt in the surface soil inhibitor includes zeolite 50~100%, bentonite 0~40%, diatomite 0~50%, and the sum of each component is
100%.
5. a kind of lightweight pervious concrete people walking along the street face brick as claimed in claim 4, which is characterized in that the zeolite boils for 5A
Stone, apertureThe bentonite is calcium-base bentonite, 35~40me/100g of sucking amount, 60~70ml/ of colloid index
15g, smectite content 55~65%；SiO in the diatomite2Content is not less than 90%.
6. a kind of lightweight pervious concrete people walking along the street face brick as described in claim 1, which is characterized in that by mass percentage,
The physical blowing agent includes sodium lauroyl glutamate 0~100%, sodium sulfate of polyethenoxy ether of fatty alcohol 0~100%, 12
Sodium alkyl sulfate 0~100%, the sum of each component are 100%.
7. a kind of lightweight pervious concrete people walking along the street face brick as described in claim 1, which is characterized in that the chemical foaming agent is
Hydrogen peroxide；The water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid, and solid content 12.5~14.0%, water-reducing rate is not less than 25%.
8. a kind of preparation method of lightweight pervious concrete people walking along the street face brick, feature exist as described in any one of claim 1 to 7
In including the following steps：
1) each raw material is weighed by mass percent shared by raw material；
2) by cement, ground slag, flyash, pottery sand, river sand, exciting agent, accumulation of salt in the surface soil inhibitor, manganese dioxide, potassium carbonate, diminishing
Agent, water are mixed until forming distributed slurry；
3) foam is made in physical blowing agent, and directly by foam injection step 2 in foaming process) obtained by distributed slurry in
It stirs evenly, until physical blowing agent foaming finishes；
4) chemical foaming agent is added in foam concrete obtained by step 3) and is stirred evenly, chemical foaming agent is made to be dispersed in
In foam concrete, foam concrete of the mix after uniform is injected into pattern, stands demoulding to get lightweight pervious concrete people's row
Pavior brick.
9. a kind of preparation method of lightweight pervious concrete people walking along the street face brick as claimed in claim 8, which is characterized in that the object
Foam is made using compressed air method in haircut infusion.
10. a kind of preparation method of lightweight pervious concrete people walking along the street face brick as claimed in claim 8, which is characterized in that step
2) in, the stir speed (S.S.) is 100~200r/min；In step 3), the stir speed (S.S.) is 60~80r/min；In step 4),
The stir speed (S.S.) is 40~60r/min, 25~40s of mixing time.
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