CN109970402A - A kind of regeneration concrete and preparation method thereof using discarded concrete - Google Patents
A kind of regeneration concrete and preparation method thereof using discarded concrete Download PDFInfo
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- CN109970402A CN109970402A CN201910344304.2A CN201910344304A CN109970402A CN 109970402 A CN109970402 A CN 109970402A CN 201910344304 A CN201910344304 A CN 201910344304A CN 109970402 A CN109970402 A CN 109970402A
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of regeneration concretes and preparation method thereof using discarded concrete, belong to construction material technical field of concrete, be made of the raw material comprising following parts by weight: 400~420 parts of cement, 55~75 parts of mineral admixture, 700~730 parts of fine aggregate, 1040~1100 parts of modification regeneration coarse aggregate, 8~11 parts of water-reducing agent and 140~170 parts of water.The present invention have the effect of good mechanical property, to regenerated coarse aggregate modification it is at low cost.
Description
Technical field
The present invention relates to construction material technical field of concrete, more specifically, it relates to which a kind of utilize discarded concrete
Regeneration concrete and preparation method thereof.
Background technique
Concrete is one of construction material most large in modern project structure, with the fast development of economic construction of China
With constantly improve for infrastructure construction, the consumption of concrete is also sharply increased.Concrete is by cementitious material and aggregate
Cementing integral engineered composite material is more than every year 2000000000 tons by the natural aggregate that concrete consumes, to aggregate resources
A large amount of exploitations easily cause arable land to be destroyed, mountain forest is by ruining and the problems such as scarcity of resources.Currently, for exploitation reducig natural sand building stones pair
The destruction and exploitation energy consumption of environment, carrying out regeneration to building wastes such as discarded concretes is a kind of good mode, both
It can be reduced the expense of processing discarded concrete, and limited mineral resources can be saved.
Regeneration for building wastes such as discarded concretes removes after mainly separating building solid castoff
Miscellaneous and broken processing, it is different according to broken material particle size, the material after processing is sieved as regenerated coarse aggregate, the thin bone of regeneration
Material is less than the regenerative micro powder of 0.16mm using the partial size of the collections such as dust collection equipment in broken processing and screening process.But it regenerates
The corner angle of aggregate are more, and porosity is big, and the regeneration process of aggregate can generate a large amount of microscopic checks inside it, lead to its suction
Water rate is high, influences the performance of regeneration concrete.
In the prior art, notification number is that the Chinese patent of CN108558324A discloses a kind of impervious regeneration concrete, by
50-70 parts of cement, 30-45 parts of natural fine aggregate, 70-80 parts of modification regeneration coarse aggregate, 5-10 parts of flyash, 0.5-
2 parts of water-reducing agent, 8-12 parts of additive, 5-6 parts of urase and 25-30 parts of water composition, by being carried out to regenerated coarse aggregate
It is modified, ethyl orthosilicate and urea are filled inside discarded concrete, promote silica and calcium carbonate pair in regenerated coarse aggregate
Internal void is filled, to improve the consistency and resistance to compression, impermeability of regeneration concrete.But regenerated coarse aggregate is regeneration coagulation
Main constituents in soil use hydrofluoric acid, urea, gel, glutaraldehyde, ethyl orthosilicate and surfactant in the program
Etc. plurality of reagents discarded concrete is modified, will also be using the techniques side such as concentrated by rotary evaporation, ball milling, freezing in modifying process
Method, very high, the modified cost of requirement to equipment is very big, and the cost that will lead to regeneration concrete in this way increases, and is unfavorable for again
The application of growing concrete and universal.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention be to provide it is a kind of using discarded concrete
Regeneration concrete, have the advantages that good mechanical property, to regenerated coarse aggregate modification it is at low cost.
Second object of the present invention is to provide a kind of preparation method of regeneration concrete using discarded concrete,
Simple with method, easily controllable and operation, the high advantage of recycled concrete strength obtained.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that it is a kind of using discarded concrete again
Growing concrete is made of the raw material comprising following parts by weight: 400~420 parts of cement, 55~75 parts of mineral admixture, 700
~730 parts of fine aggregate, 1040~1100 parts of modification regeneration coarse aggregate, 8~11 parts of water-reducing agent and 140~170 parts of water.
The mineral admixture includes at least one of flyash, blast-furnace cinder and silicon ash.
The modification regeneration coarse aggregate is obtained by the modified slurries modification of regenerated coarse aggregate, and the modified slurries are gelling material
The mixed serum of material and inorganic gel agent.
By using above-mentioned technical proposal, using cement as cementitious material, using mineral admixture as supplementary cementitious material, will give up
Abandoning regenerated coarse aggregate made of concrete uses modified slurries modified as coarse aggregate, makes jointly with fine aggregate, water-reducing agent and water
At regeneration concrete.Modified slurries are the mixing with certain consistency being mixed to form by cementitious material and inorganic gel agent and water
Slurries are modified processing to regenerated coarse aggregate with modified slurries, are filled slurries to hole, the crackle on recycled aggregate
Or bonding, improve the pore structure of recycled aggregate, is conducive to the intensity for improving recycled aggregate and regeneration concrete.It can be achieved in this way
Discarded concrete is made full use of, while maintaining the mechanical property of regeneration coagulation, is conducive to expand raw using discarded concrete
The application of the recycled aggregate of production.
The present invention is further arranged to, and further includes 0.6~1.2 part of polypropylene fibre.
By using above-mentioned technical proposal, polypropylene fibre is using the isotactic polypropylene obtained by propylene polymerization as raw material system
At synthetic fibers, be conducive to the formation and development that inhibit and prevent crack in regeneration concrete, be conducive to improve regeneration coagulation
Anticracking, the scour & wear resistance energy of soil, and then increase the toughness and service life of regeneration concrete.
The present invention is further arranged to, and the cementitious material includes regenerative micro powder, miberal powder and glass powder, and the regeneration is micro-
The dosage mass ratio of powder, miberal powder and glass powder is (1.8-2.2): 1:(2.5-3.5).
By using above-mentioned technical proposal, regenerative micro powder is the discarded concrete built using dismantling concrete, warp
Cross the powder that the partial size obtained after broken, screening and grinding is less than 0.16mm, main chemical compositions and ordinary portland cement
It is close, but in regenerative micro powder silica content it is higher, therefore regenerative micro powder occur hydration reaction production jel product ability
It is poorer than ordinary cement.Regenerative micro powder cooperates with miberal powder, glass powder according to aforementioned proportion, is conducive to the work for improving regenerative micro powder
Property, regenerated coarse aggregate can be modified directly as cementitious material.It has been better achieved in this way to discarded concrete
Make full use of, being also beneficial to reduces this smaller dust particles float of regenerative micro powder causes serious atmosphere dirty in atmosphere
The probability of dye, the haze phenomenon in exacerbation city.
The present invention is further arranged to, the inorganic gel agent include in palygorskite, diatomite and aluminium-magnesium silicate at least
It is a kind of.
By using above-mentioned technical proposal, the flag that palygorskite is made of fibrous agrregate has very strong absorption
Ability and colloidal property, toughness are conducive to the viscosity for improving slurries, promote the gelling component in slurries to regenerated coarse aggregate
Filling in hole.Diatomite has fine and smooth, loose, permeability is strong property, may advantageously facilitate modified slurries to regenerated coarse aggregate
Hole in penetrate into.Aluminium-magnesium silicate is compound colloidal materials, has good rheological characteristic and thixotropy, is may expand in water as glue
State dispersion is conducive to the consistency for increasing modified slurries, and then increases contact of the gelling component with regenerated coarse aggregate.Palygorskite,
Diatomite and aluminium-magnesium silicate cooperate with cementitious materials such as regenerative micro powders respectively, are conducive to improve modified slurries to regenerated coarse aggregate
Modified effect.
The present invention is further arranged to, and the modified slurries include regenerative micro powder, 2~3 parts of the miberal powder, 6~8 of 4~6 hairs
The glass powder, 1~2 part of palygorskite, 0.8~1.2 part of aluminium-magnesium silicate and 15~20 parts of water of part.
By using above-mentioned technical proposal, using regenerative micro powder, miberal powder and glass powder as cementitious material, with palygorskite and silicon
Sour magnalium obtains modified slurries as inorganic gel agent after mixing with water, in this way with discarded concrete it is broken, isolated again
Raw micro mist is modified feedstock, and glass powder can also be used the glass powder that scrap glass obtains after grinding, advantageously reduce modified slurry
The preparation cost of liquid, and then reduce the cost modified to regenerated coarse aggregate.
The present invention is further arranged to, the modification regeneration coarse aggregate the preparation method is as follows:
Each raw material is weighed according to parts by weight formula, regenerative micro powder, miberal powder glass powder, palygorskite and aluminium-magnesium silicate are mixed, stirring
Water is added after uniformly, it is uniform to slurries to continue stirring, obtains modified slurries；Modified slurries are equably sprayed in stirring again
Raw aggregate surface infiltrates the recycled aggregate surface slurries that are modified sufficiently, be then allowed to stand dry to get.
It can be by regenerative micro powder, miberal powder and glass powder during preparing modified slurries by using above-mentioned technical proposal
Mixed after separate compiling, can also by regenerative micro powder, miberal powder and glass powder intergrinding upon mixing, make the fineness of powder it is smaller,
More evenly, be conducive to improve the hydration activity after three's cooperation, then cooperate with palygorskite and aluminium-magnesium silicate, it is right to may advantageously facilitate its
The modified effect of regenerated coarse aggregate.
The present invention is further arranged to, and the mineral admixture is flyash.
By using above-mentioned technical proposal, it is coal-fired electricity that flyash, which is the fine ash that catching is got off in flue gas after coal combustion,
The primary solids waste of factory's discharge, main component is many oxide, because of three oxidation two of its active silica and activity
Aluminium can issue raw hydration in alkaline environment, and as mineral admixture, auxiliary gelling can be cooperated with cement.
The present invention is further arranged to, and is made of the raw material comprising following parts by weight: 405~415 parts of cement, 60~70
Flyash, 0.8~1 part of the polypropylene fibre, 710~720 parts of fine aggregate, the thick bone of 1060~1080 parts of modification regeneration of part
Material, 8~10 parts of water-reducing agent and 150~160 parts of water.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that it is a kind of using discarded concrete again
The preparation method of growing concrete, comprising the following steps:
Each raw material is weighed according to parts by weight formula, by cement, flyash, polypropylene fibre, modification regeneration coarse aggregate and fine aggregate
Water and water-reducing agent is added in mixing after mixing, stir after 50~80s to get.Wherein, the system of the modification regeneration coarse aggregate
Preparation Method is as follows:
Each raw material is weighed according to parts by weight formula, regenerative micro powder, miberal powder glass powder, palygorskite and aluminium-magnesium silicate are mixed, stirring
Water is added after uniformly, it is uniform to slurries to continue stirring, obtains modified slurries；Modified slurries are equably sprayed in stirring again
Raw aggregate surface makes recycled aggregate surface be modified serous infiltration, be then allowed to stand dry to get.
By using above-mentioned technical proposal, first solid material is mixed, is conducive to the uniformity for improving each material mixing, so
Mixed solid material is mixed with water, water-reducing agent afterwards, is easier to obtain uniformly mixed concrete mix in this way.
In conclusion advantageous effects of the invention are as follows:
One, by being modified using modified slurries to regenerated coarse aggregate, power is then prepared using modification regeneration coarse aggregate
Regeneration concrete of good performance is learned, may advantageously facilitate and discarded concrete is made full use of, reduces discarded concrete to environment
Pollution.
Two, the cementitious material in modified slurries uses regenerative micro powder, glass powder and miberal powder, and three is respectively by discarding coagulation
Soil, scrap glass and ore processing by-product obtain, and low in cost, method is simple, easy to operate.
Three, modified slurries are made of regenerative micro powder, glass powder, miberal powder, palygorskite and aluminium-magnesium silicate, glass powder and miberal powder with
Regenerative micro powder cooperation is conducive to the activity for improving regenerative micro powder, palygorskite and aluminium-magnesium silicate compounding, is conducive to improve modified slurries
To the modified effect of regenerated coarse aggregate.
Specific embodiment
The technical solution of the embodiment of the present invention is described below, specific person is not specified in embodiment, according to conventional strip
The condition that part or manufacturer suggest carries out.Reagents or instruments used without specified manufacturer, being can be by commercially available purchase
The conventional products of acquisition.
The present invention applies the cement used in example as P.O45.5R, and regenerated coarse aggregate is the bone of 5~25mm continuous size fraction gradation
Material, fine aggregate are 2 area's Machine-made Sands, and blast-furnace cinder uses S95 grades of slags.In the case where being not particularly illustrated, water-reducing agent is using poly-
Carboxylic acid water reducer, flyash uses II grade of flyash, and 45 μm of flyash are tailed over no more than 30%, and glass powder, which uses, to be passed through
The glass powder of 0.15mm sieve, and in glass powder be more than 70% particle size distribution between 4~80 μm.
The preparation example of modification regeneration coarse aggregate
Preparation example 1
This preparation example provides a kind of modification regeneration coarse aggregate, modification regeneration coarse aggregate the preparation method is as follows: by 6.4kg's
Regenerative micro powder, the miberal powder of 3.2kg, the glass powder of 9.6kg, the palygorskite of 1.6kg, 1.28kg aluminium-magnesium silicate after mixing,
The water of 24kg is added, stirs into uniform modified slurries.The regenerated coarse aggregate of 140kg is placed in stirring container and is stirred,
The modification slurries of 42kg are equably sprayed on recycled aggregate surface, infiltrate the surface of its regenerated coarse aggregate, then
Regenerated coarse aggregate is taken out, is spread out, stand dry after to get.
Preparation example 2-5
Preparation example 2-5 and the difference of preparation example 1 essentially consist in: the modification slurry formula of preparation example 2-5 and modified slurries
(the dosage unit of each ingredient is kg) in table 1 as shown in table 1 with the mass ratio of regenerated coarse aggregate.
The modification slurry formula of 1 preparation example 2-5 of table and its mass ratio with regenerated coarse aggregate
| Ingredient | Preparation example 2 | Preparation example 3 | Preparation example 4 | Preparation example 5 |
| Regenerative micro powder | 7 | 6 | 7 | 7 |
| Miberal powder | 3.5 | 3 | 3.5 | 3.5 |
| Glass powder | 9.8 | 8 | 9.8 | 10 |
| Palygorskite | 2.1 | 2 | / | / |
| Diatomite | / | / | 2.8 | 2.1 |
| Aluminium-magnesium silicate | 1.4 | 1.2 | / | 1.4 |
| Water | 25.2 | 20 | 25 | 25 |
| Modified slurries: regenerated coarse aggregate | 0.32 | 0.28 | 0.3 | 0.3 |
Embodiment
Embodiment 1
A kind of component formula such as table the present embodiment provides regeneration concrete using discarded concrete, in regeneration concrete
Shown in 2, preparation method includes the following steps: each raw material is weighed according to the amounts of components in table 2, by cement, flyash, modification
Regenerated coarse aggregate and fine aggregate mixing, are added water and water-reducing agent after stirring 15s, stir after 80s to get.What the present embodiment used
Modification regeneration coarse aggregate is product made from preparation example 1.
Embodiment 2
The present embodiment and the difference of embodiment 1 essentially consist in: the regeneration concrete component formula of the present embodiment such as 2 institute of table
Show, in preparation process, weigh each raw material according to the amounts of components in table 2, then by cement, flyash, polypropylene fibre, change
Property regenerated coarse aggregate and fine aggregate mixing, be stirred together for that water and water-reducing agent are added after 20s, continue to stir after 50s to get.This reality
The modification regeneration coarse aggregate that example uses is applied as modification regeneration coarse aggregate made from preparation example 1, the water-reducing agent that the present embodiment uses for
Naphthalene water reducer.
Embodiment 3
The present embodiment and the difference of embodiment 1 essentially consist in: the regeneration concrete component formula of the present embodiment such as 2 institute of table
Show, in preparation process, after weighing each raw material according to the amounts of components in table 2, by cement, flyash, polypropylene fibre, modification
Regenerated coarse aggregate and fine aggregate mixing, are added water and water-reducing agent after stirring 18s, stir after 70s to get.What the present embodiment used
Modification regeneration coarse aggregate is product made from preparation example 1.
Embodiment 4-5
Embodiment 4-5 and the difference of embodiment 3 essentially consist in: the regeneration concrete component formula of embodiment 4-5 such as 2 institute of table
Show, in formula the modification regeneration coarse aggregate that uses be product made from preparation example 1 (in table 2 the dosage unit of each ingredient for
kg)。
The regeneration concrete component formula of 2 embodiment 1-5 of table
| Ingredient | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Cement | 48 | 48.6 | 49.2 | 49.8 | 50.4 |
| Flyash | 9 | / | 7.8 | 7.2 | / |
| Blast-furnace cinder | / | 8.4 | / | / | / |
| Silicon ash | / | / | / | / | 6.6 |
| Fine aggregate | 84 | 85.2 | 85.8 | 86.4 | 87.6 |
| Modification regeneration coarse aggregate | 124.8 | 127.2 | 128.4 | 129.6 | 132 |
| Water-reducing agent | 0.96 | 1.08 | 1.14 | 1.2 | 1.32 |
| Polypropylene fibre | / | 0.096 | 0.108 | 0.12 | 0.144 |
| Water | 16.8 | 18 | 18.6 | 19.2 | 20.4 |
Embodiment 6
The present embodiment and the difference of embodiment 3 essentially consist in: the modification regeneration coarse aggregate that the present embodiment uses is preparation example 2
Product obtained.
Embodiment 7
The present embodiment and the difference of embodiment 3 essentially consist in: the modification regeneration coarse aggregate that the present embodiment uses is preparation example 3
Product obtained.
Embodiment 8
The present embodiment and the difference of embodiment 3 essentially consist in: the modification regeneration coarse aggregate that the present embodiment uses is preparation example 4
Product obtained.
Embodiment 9
The present embodiment and the difference of embodiment 3 essentially consist in: the modification regeneration coarse aggregate that the present embodiment uses is preparation example 5
Product obtained.
Comparative example
Comparative example 1
The difference of this comparative example and embodiment 1 essentially consists in: the coarse aggregate that this comparative example uses for common regenerated coarse aggregate,
Common regenerated coarse aggregate is discarded concrete through regenerated coarse aggregate that is broken, directly obtaining after screening.
Performance detection test
Changed according to the national standard of " concrete regenerated coarse aggregate " (GB/T25177-2010) to made from each preparation example
Property regenerated coarse aggregate detected, and as a comparison with unmodified common regenerated coarse aggregate, measure its water absorption rate, crushing refers to
Mark, apparent density and voidage, testing result are as shown in table 3.
The testing result of each preparation example of table 3
Seen from table 3, the performance indicator of modification regeneration coarse aggregate made from each preparation example is superior to common regenerated coarse aggregate,
Common regenerated coarse aggregate meets the performance standard of III class coarse aggregate in national standard, and preparation example 4 and 5 meets II class coarse aggregate
Performance standard, preparation example 1 to 3 meet the performance indicator of I class coarse aggregate, it was demonstrated that modification slurries of the invention have regenerated coarse aggregate
Apparent modified effect, and regenerative micro powder, miberal powder, glass powder, palygorskite and aluminium-magnesium silicate compounding effect better than regenerative micro powder,
Miberal powder and glass powder are compounded with other gelling agents.
According to the national standard of " Standard for test methods of properties of ordinary concrete mixture standard " (GB/T50080-2016) to each
Regeneration concrete mixture made from embodiment and comparative example is detected, and detects its slump and divergence, testing result is such as
Shown in table 4.
The testing result of each embodiment and comparative example regeneration concrete mixture of table 4
| Group | The slump/mm | Divergence/mm |
| Embodiment 1 | 170 | 420 |
| Embodiment 2 | 195 | 470 |
| Embodiment 3 | 205 | 490 |
| Embodiment 4 | 190 | 480 |
| Embodiment 5 | 180 | 450 |
| Embodiment 6 | 205 | 500 |
| Embodiment 7 | 210 | 510 |
| Embodiment 8 | 185 | 460 |
| Embodiment 9 | 180 | 430 |
| Comparative example 1 | 135 | 340 |
As table 4 as it can be seen that the slump Yu divergence of regeneration concrete mixture made from each embodiment are all larger than comparative example
Regeneration concrete mixture obtained, it is seen that regeneration concrete mixture mobility made from each embodiment is better than comparative example.By
It is lower than the common regenerated coarse aggregate that comparative example uses in each modification regeneration coarse aggregate water absorption rate used in the examples, was mixing and stirring
The water of Cheng Zhong, consumption are less, and the regeneration concrete mixture after mixing and stirring is made to have good mobility.
According to " standard for test methods of mechanical properties of ordinary concrete " (GB/T50081-2002) to each embodiment and comparison
Regeneration concrete (concrete mix demoulded, conserved after finished product) made from example is detected, detect its compression strength and
Flexural strength, testing result are as shown in table 5.
The Mechanical properties of recycled concrete testing result of each embodiment and comparative example of table 5
By table 5 as it can be seen that the mechanical property of the regeneration concrete of each embodiment preparation is substantially better than the regeneration of comparative example preparation
Concrete, it is seen that facilitate to promote the mechanical property of regeneration concrete using modification regeneration coarse aggregate.In various embodiments, real
The Mechanical properties of recycled concrete for applying example 3,6 and 7 is substantially better than embodiment 8 and 9, it was demonstrated that modification regeneration made from preparation example 1 to 3
Coarse aggregate performance is better than preparation example 4 and 5, the i.e. fiting effect of regenerative micro powder, miberal powder, glass powder, palygorskite and aluminium-magnesium silicate more
It is good.The regeneration concrete of embodiment 1 is slightly poor compared with the regeneration concrete of other embodiments, it was demonstrated that the regeneration for adding polypropylene fibre is mixed
Solidifying soil has superior mechanical property.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of regeneration concrete using discarded concrete, which is characterized in that be made of the raw material comprising following parts by weight:
400~420 parts of cement, 55~75 parts of mineral admixture, 700~730 parts of fine aggregate, 1040~1100 parts of modification are again
Raw coarse aggregate, 8~11 parts of water-reducing agent and 140~170 parts of water；
The mineral admixture includes at least one of flyash, blast-furnace cinder and silicon ash；
The modification regeneration coarse aggregate is obtained by regenerated coarse aggregate modified slurries modification, the modified slurries be cementitious material and
The mixed serum of inorganic gel agent.
2. a kind of regeneration concrete using discarded concrete according to claim 1, which is characterized in that further include 0.8
~1.2 parts of polypropylene fibre.
3. a kind of regeneration concrete using discarded concrete according to claim 1, which is characterized in that the gelling material
Material includes regenerative micro powder, miberal powder and glass powder, and the dosage mass ratio of the regenerative micro powder, miberal powder and glass powder is (1.8-2.2):
1:(2.5-3.5).
4. a kind of regeneration concrete using discarded concrete according to claim 3, which is characterized in that the inorganic glue
Solidifying agent includes at least one of palygorskite, diatomite and aluminium-magnesium silicate.
5. a kind of regeneration concrete using discarded concrete according to claim 4, which is characterized in that the modified slurry
Liquid includes regenerative micro powder, 2~3 parts of the miberal powder, 6~8 parts of glass powder, 1~2 part of palygorskite, 0.8~1.2 part of 4~6 hairs
Aluminium-magnesium silicate and 15~20 parts of water.
6. a kind of regeneration concrete using discarded concrete according to claim 5, which is characterized in that the modification is again
Raw coarse aggregate the preparation method is as follows:
Each raw material is weighed according to parts by weight formula, regenerative micro powder, miberal powder, glass powder, palygorskite and aluminium-magnesium silicate are mixed, stirring
Water is added after uniformly, it is uniform to slurries to continue stirring, obtains modified slurries；Modified slurries are equably sprayed in stirring again
Raw aggregate surface makes recycled aggregate surface be modified serous infiltration, be then allowed to stand dry to get.
7. a kind of regeneration concrete using discarded concrete according to claim 1, which is characterized in that the mineral are mixed
It is flyash with material.
8. according to claim 1 to a kind of regeneration concrete using discarded concrete, feature described in any one in 7
It is, is made of the raw material comprising following parts by weight: 405~415 parts of cement, 60~70 parts of flyash, 0.8~1 part
Polypropylene fibre, 710~720 parts of fine aggregate, 1060~1080 parts of modification regeneration coarse aggregate, 8~10 parts of water-reducing agent and
150~160 parts of water.
9. a kind of preparation side of regeneration concrete using discarded concrete as claimed in any of claims 1 to 8
Method, which comprises the following steps:
Each raw material is weighed according to parts by weight formula, by cement, flyash, polypropylene fibre, modification regeneration coarse aggregate and fine aggregate
Water and water-reducing agent is added in mixing after mixing, stir after 50~80s to get.
10. a kind of preparation method of regeneration concrete using discarded concrete according to claim 9, feature exist
In, the modification regeneration coarse aggregate the preparation method is as follows:
Each raw material is weighed according to parts by weight formula, regenerative micro powder, miberal powder, glass powder, palygorskite and aluminium-magnesium silicate are mixed, stirring
Water is added after uniformly, it is uniform to slurries to continue stirring, obtains modified slurries；Modified slurries are equably sprayed in stirring again
Raw aggregate surface infiltrates the recycled aggregate surface slurries that are modified sufficiently, be then allowed to stand dry to get.
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| CN201910344304.2A CN109970402A (en) | 2019-04-26 | 2019-04-26 | A kind of regeneration concrete and preparation method thereof using discarded concrete |
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| CN201910344304.2A CN109970402A (en) | 2019-04-26 | 2019-04-26 | A kind of regeneration concrete and preparation method thereof using discarded concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114380557B (en) * | 2022-01-26 | 2022-12-16 | 广东华南混凝土有限公司 | High-strength environment-friendly concrete for pavement and preparation method thereof |
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