CN109095802A - Expansive agent for concrete, concrete and preparation method thereof - Google Patents
Expansive agent for concrete, concrete and preparation method thereof Download PDFInfo
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- CN109095802A CN109095802A CN201810978402.7A CN201810978402A CN109095802A CN 109095802 A CN109095802 A CN 109095802A CN 201810978402 A CN201810978402 A CN 201810978402A CN 109095802 A CN109095802 A CN 109095802A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention discloses a kind of expansive agent for concrete, concrete and preparation method thereof, wherein, the expansive agent for concrete contains swelling agent base-material and additive, and the additive is meta-aluminate, and the mass ratio of the meta-aluminate and the swelling agent base-material is 1.0%-3.0%.In parts by mass, every cubic metre of concrete contains: cement, and 240-300 parts；Expansive agent for concrete, 15-63 parts；Sand, 920-1110 parts；Stone, 810-1000 parts；2.1-3.6 parts of water-reducing agent；And water, 160-175 parts.Technical solution of the present invention is able to ascend the swell increment of concrete, realizes uniform expansion, enhances the compactness of concrete.
Description
Technical field
The present invention relates to technical field of concrete, in particular to a kind of expansive agent for concrete, concrete and its preparation side
Method.
Background technique
Assembled architecture is the main trend of construction industry development, and the primary structure form of assembled architecture is then concrete
Soil structure.Connection in precast concrete between prefabricated components pours coagulation after bringing largely, and normal concrete pours
Afterwards, it inevitably shrinks, it is serious to even result in cracking, influence structure safety.Swelling agent benefit is added in concrete
Volume stability is made with the contraction of its bulking effect compensating concrete generated, and good expansive concrete is a kind of common
Economy, effective and practical method.
After swelling agent is added in concrete, swelling agent aquation had both consumed the hydrated product of water or other cementitious materials,
Novel substance is generated, while the swelling stress generated also has a major impact concrete structure.It is according to chemical composition different, swelling agent
It is broadly divided into calcium sulphoaluminate class swelling agent, calcium oxide expansion agents and calcium sulphoaluminate-calcium oxide expansion agents and magnesia class is swollen
Swollen dose, these swelling agents impact concrete Minerals admixture aquation and agent on crack resistance of concrete carbonization, resisting erosion of sulfate etc..
Swelling agent can reduce fresh concrete mobility, and increase reducing effect with volume and be more obvious.This is because expansion
Agent aquation usually occurs to cause Free water in concrete to reduce in early stage；The needle-shaped or column entringite and plate that aquation generates
Calcium hydroxide obviously increases the viscosity and yield shear stress of cement paste, thereby reduces fresh concrete mobility.It is swollen
Swollen dose has a major impact concrete density and hydrated product, and the expansion of current many swelling agents is difficult to control, during expansion
The stress of generation is excessive, reduces the compactness of concrete instead, and concrete durability cannot be guaranteed.
Summary of the invention
The main object of the present invention is to provide a kind of expansive agent for concrete, it is intended to promote the swell increment of concrete, realize
Uniform expansion, enhances the compactness of concrete.
To achieve the above object, expansive agent for concrete proposed by the present invention, it is described containing swelling agent base-material and additive
Additive is meta-aluminate, and the mass ratio of the meta-aluminate and the swelling agent base-material is 1.0%-3.0%.
Optionally, the swelling agent base-material is sulphoaluminate expander.
Optionally, the meta-aluminate is at least one of sodium metaaluminate and potassium metaaluminate.
The invention also provides a kind of concrete, and in parts by mass, every cubic metre of concrete contains:
Cement, 240-300 parts；
Foregoing expansive agent for concrete, 15-63 parts；
Sand, 920-1110 parts；
Stone, 810-1000 parts；
2.1-3.6 parts of water-reducing agent；And
Water, 160-175 parts.
Optionally, the cement is the portland cement or ordinary portland cement of strength grade 42.5；And/or it is described
Water-reducing agent is high performance water reducing agent of polyocarboxy acid.
Optionally, the sand is Machine-made Sand or river sand, fineness modulus 2.3-2.8；And/or the stone is continuous grading
Rubble, partial size 5mm-20mm.
Optionally, in parts by mass, every cubic metre of concrete also contains 60-120 parts of active blends.
Optionally, the active blend is at least one of flyash and zeolite powder.
The invention also provides a kind of preparation method of concrete, the preparation method the following steps are included:
In parts by mass, 15-63 parts of expansive agent for concrete, 240-300 parts of cement, 920-1110 parts of sand, 810- are provided
1000 parts of stones, 2.1-3.6 parts of water-reducing agents and 160-175 parts of water；
The expansive agent for concrete, the cement, the sand and the stone are mixed, mixed resin is obtained；
The water-reducing agent and the water are mixed, diminishing agent solution is obtained；
The diminishing agent solution is added in the mixed resin, is stirred, obtains the concrete.
Optionally, in described the step of obtaining mixed resin, 60-120 parts of active blends are also added into.
Compared to the prior art, it is swollen to have the advantages that expansive agent for concrete contains for technical solution of the present invention
Swollen dose of base-material and additive, additive are meta-aluminate, and the proportion by reasonably adjusting meta-aluminate and swelling agent base-material, are made
It obtains additive and swelling agent base-material plays synergistic effect well, and effectively adjust swelling agent base-material hydrated product entringite
Generating rate, to promote its swell increment, thus realize more uniform expansion, meanwhile, when expansive agent for concrete of the present invention is answered
When for concrete, it can effectively enhance the density of concrete.
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 every other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not the present invention claims protection scope within.
The present invention proposes a kind of expansive agent for concrete, which contains swelling agent base-material and additive,
Additive is meta-aluminate, and the mass ratio of meta-aluminate and swelling agent base-material is 1.0%-3.0%.
Coagulation is added so that swelling agent has preferable expansion character in main component of the swelling agent base-material as swelling agent
After soil coagulation can be shunk to be prepared into the good compensation of volume stability using the contraction of its bulking effect compensating concrete generated
Soil.According to chemical component difference, swelling agent base-material is divided into calcium sulphoaluminate class swelling agent base-material, calcium oxide expansion agents base-material, sulphur
Calcium aluminate-calcium oxide expansion agents base-material, magnesia class swelling agent base-material.The main active of swelling agent base-material is aluminium oxide
And calcium oxide, when being used for concrete, aquation usually occurs in early stage and produces needle-shaped or columnar entringite and plate for swelling agent base-material
Shape calcium hydroxide.Meta-aluminate is as additive, after addition, can play and act synergistically with swelling agent base-material therein, promote swollen
The hydration reaction of swollen dose of base-material, and the generating rate of hydrated product entringite can be promoted, to promote swell increment, to realize uniform
Expansion, while enhancing the density of concrete.
In expansive agent for concrete of the present invention, the proportion of meta-aluminate and swelling agent base-material will be suitable for the mass ratio of the two
For 1.0%-3.0%, for example, using the mass ratio of meta-aluminate and swelling agent base-material for 1% perhaps 2% or 3%.If
The dosage of meta-aluminate is less than 1%, then cannot play and act synergistically with whole swelling agent base-materials, finally swell increment be promoted
It is unobvious, and the secret room promotion for expanding uniformity and concrete is unobvious；If the dosage of meta-aluminate is more than 3%, then can
Its effect cannot be played by having the meta-aluminate of part, be resulted in waste of resources.
Therefore, compared to the prior art, technical solution of the present invention has the advantages that expansive agent for concrete contains
There are swelling agent base-material and additive, additive is meta-aluminate, and by reasonably adjusting matching for meta-aluminate and swelling agent base-material
Than so that additive and swelling agent base-material play synergistic effect well, and effectively adjusting swelling agent base-material hydrated product calcium
The generating rate of aluminite, to promote its swell increment, to realize more uniform expansion, meanwhile, when concrete of the present invention is with swollen
Swollen dose be applied to concrete when, can effectively enhance the density of concrete.
Preferably, swelling agent base-material is sulphoaluminate expander.Sulphoaluminate expander is a kind of high performance swelling agent,
Its main component is calcium sulphoaluminate, and when being added in concrete, sulphoaluminate expander can generate bulking effect, to compensate coagulation
The contraction of soil is to be made the good expansive concrete of volume stability.
Optionally, meta-aluminate is at least one of sodium metaaluminate and potassium metaaluminate.Sodium metaaluminate and potassium metaaluminate are made
For meta-aluminate, after addition, the hydration reaction of swelling agent base-material can be effectively facilitated, promotes the generation speed of hyrate entringite
Rate, to promote its swell increment.In one embodiment of this invention, using sodium metaaluminate perhaps potassium metaaluminate or the two
Composition.
The invention also provides a kind of concrete, and in parts by mass, every cubic meter of concrete contains: cement, 240-300
Part；Expansive agent for concrete, 15-63 parts；Sand, 920-1110 parts；Stone, 810-1000 parts；2.1-3.6 parts of water-reducing agent；And water,
160-175 parts.
The basic ingredient of cement, sand, stone and water as concrete, wherein cement is as cementitious material, it may occur that aquation
Calcium hydroxide is generated, expansive agent for concrete is added, active constituent aluminium oxide therein can be acted on hydrolysis product of cement, be formed
Aquation tricalcium aluminate, so that concrete has preferable intensity and density.In order to guarantee the preferable application property of concrete, need
Water-reducing agent is added.Water-reducing agent can generate strong peptizaiton to cement granules therein, and water-reducing agent is at cement granules interface
Absorption and formation electric double layer, can to generate electrostatic reprimand stress between cement granules, its flocculent structure be broken, so that mixed
The yield shear stress that solidifying soil starts flowing reduces, and obtains high fluidity energy, while can efficiently control the dosage of concrete,
To guarantee the requirement of mechanics and durability.
The dosage of each raw material will be suitable in concrete of the present invention, so that the concrete performance being finally prepared is preferable.
Wherein, in parts by mass, in every cubic meter of concrete, the dosage of cement is 240-300 parts, for example uses 240 parts or 260
Part or 300 parts；The dosage of expansive agent for concrete is 15-63 parts, is the 5%-15% of cementitious material in concrete, such as
Using 15 parts, 30 parts, 50 parts or 63 parts；Sand dosage is 920-1110 parts, for example uses 920 parts, 1000 parts or 1110
Part；The dosage of stone is 810-1000 parts, for example uses 810 parts, 900 parts or 1000 difference；The dosage of water-reducing agent is 2.1-
3.6 parts, for example use 2.1 parts, 3.0 parts or 3.6 parts；The dosage of water be 160-175 part, such as use 160 parts, 170 parts,
Or 175 parts.
Optionally, cement is the portland cement or ordinary portland cement of strength grade 42.5.The present invention selects cement
For 42.5 portland cement of strength grade or ordinary portland cement；Certainly, which also can be selected other kinds of cement, example
Such as, 32.5 portland cements, 52.5 portland cements, 62.5 portland cements, aluminate cement, sulphate aluminium cement, iron aluminium
Acid salt cement, fluoroaluminate cement, phosphate cement or special cement etc..
Optionally, water-reducing agent is polycarboxylate water-reducer.Polycarboxylate water-reducer has extremely strong water-reducing property, and chloride ion contains
It measures that low, alkali content is high, is conducive to the durability of concrete.And be added after, can be significantly increased concrete early stage, after
Phase intensity.Meanwhile the cement compatibility of high performance water reducing agent of polyocarboxy acid and concrete is preferable, so that the slump of concrete is kept
Better performances, and the construction time of concrete can be extended.
Optionally, sand is Machine-made Sand or natural river sand, fineness modulus 2.3-2.8.Machine-made Sand and natural river sand are as sand
One kind, be a kind of granular loose material, be commonly used in concrete, play the role of skeleton or filling.The fineness of the sand of selection
Modulus is 2.3-2.8, and effect is preferable, and the concrete uniformity prepared is preferable.For example, by using sand fineness modulus be 2.3 or
Person 2.5 or 2.8.
Optionally, stone is continuous grading rubble, partial size 5mm-20mm.Using continuous grading rubble, coagulation can be improved
The intensity and workability of soil reduce slurry volume, improve volume stability.The partial size of continuous grading rubble is preferably 5mm-
20mm, such as partial size are 5mm perhaps 10mm perhaps 15mm or 20mm.If partial size is less than 5mm, concrete strength is promoted
Effect is unobvious；If partial size is greater than 20mm, slurry volume cannot be effectively reduced, and the uniformity of concrete is unobvious.
Further, in parts by mass, every cubic meter of concrete also contains 60-120 parts of active blends.Active blend
As cementitious material, after addition, concrete performance can be improved, saved water, strength grade of concrete is adjusted.Active blend
Non-sclerous or its setting rate itself is very slow, but can generate calcium oxide with hydrated cementitious and react, and generating has gelling ability
Hydrated product.Also, in the presence of water-reducing agent, mobility, cohesiveness and the water-retaining property of concrete can be increased；
Improve the pumpability of concrete；The intensity and durability of maturing are improved simultaneously.Of course, the dosage of active blend is wanted
It is suitable for present invention selection 60-120 parts of active blends of every cubic meter of concrete addition, for example 60 parts of active blends is added, or
100 parts of active blends are added in person, or 120 parts of active blends are added.If the active blend content being added is less than 60 parts,
Its performance for promoting concrete is less obvious；If the active blend content being added is more than 120 parts, there will be the activity of part to mix
Its effect cannot be given full play to by closing material, be resulted in waste of resources.
It should be noted that common active blend has flyash, ground granulated blast furnace slag, zeolite powder and silicon ash.
Optionally, active blend is at least one of flyash and zeolite powder.Active blend of the invention is selected
Flyash perhaps zeolite powder or the compound of the two.Preferably, active blend is formed using flyash and zeolite powder
Complex mineral blending material after addition, can more effectively improve concrete performance, save water, and adjust strength grade of concrete.
The present invention also proposes a kind of preparation method of concrete, the preparation method the following steps are included:
In parts by mass, 15-63 parts of expansive agent for concrete, 240-300 parts of cement, 920-1110 parts of sand, 810- are provided
1000 parts of stones, 2.1-3.6 parts of water-reducing agents and 160-175 parts of water；
Mix concrete swelling agent, cement, sand and stone, obtain mixed resin；
Water-reducing agent and water are mixed, diminishing agent solution is obtained；
Diminishing agent solution is added in mixed resin, is stirred, obtains concrete.
Specifically, 15-63 parts of expansive agent for concrete, 240-300 parts of cement, 920-1110 parts of sand, 810- are weighed first
1000 parts of stones, 2.1-3.6 parts of water-reducing agents and 160-175 parts of water；Then successively by expansive agent for concrete, cement, sand and stone
It is added into blender, stirs 2-4min at room temperature, obtain uniformly mixed mixed resin.Then water-reducing agent and water are added
To in another blender, it is stirred to obtain uniform diminishing agent solution.Finally, configured diminishing agent solution is slowly added
Enter into mixed resin, continues stirring to obtaining uniformly mixed concrete.In the present invention, water-reducing agent adds as a solution
Enter, can better disperse into mixed resin, so that the performance of water-reducing agent is fully played, so that final preparation
Concrete flowability can preferably.
It should be noted that during the preparation process, the step of preparing mixed resin and the step of preparing diminishing agent solution, can
With reversed order.
Further, in the step of obtaining mixed resin, 60-120 parts of active blends are also added into.Active blend
It is added, concrete performance can be improved, save water, adjust strength grade of concrete.
Expansive agent for concrete of the present invention, concrete and preparation method thereof are illustrated below by way of specific embodiment.
Embodiment one
In parts by mass, every cubic meter of concrete contains: 300 parts of cement, 31.465 parts of expansive agent for concrete, activity is mixed
Close 60 parts of material, 970 parts of sand, 950 parts of stone, 165 parts of water and 3.6 parts of water-reducing agent；Wherein, 31.465 parts of expansive agent for concrete contain
There are 31 parts of sulphoaluminate expander, 0.31 part of sodium metaaluminate and 0.155 part of potassium metaaluminate；60 parts of active blends contain flyash
30 parts and 30 parts of zeolite powder.
The preparation method of the present embodiment concrete the following steps are included:
Cement, expansive agent for concrete, active blend, sand and stone are sequentially added into blender, under room temperature,
2min is stirred, mixed resin is obtained；
Water-reducing agent and water are sequentially added into blender, stirred evenly, diminishing agent solution is prepared；
The diminishing agent solution prepared is slowly added into the blender for filling mixed resin, stirring evenly can obtain
To concrete.
By the concreting being stirred into mold, and performance survey is carried out to concrete during its pouring molding
Examination, the performance test results are shown in Table 1.
Embodiment two
In parts by mass, every cubic meter of concrete contains: 240 parts of cement, 28.28 parts of expansive agent for concrete, activity is mixed
Close 120 parts of material, 920 parts of sand, 1000 parts of stone, 170 parts of water and 3.4 parts of water-reducing agent；Wherein, 28.28 parts of expansive agent for concrete contain
There are 28 parts and 0.28 part of sodium metaaluminate of sulphoaluminate expander；120 parts of active blends contain 40 parts of flyash and zeolite powder 80
Part.
The preparation method of the present embodiment concrete preparation method referring to described in embodiment one, this is no longer going to repeat them.
And the concreting that the present embodiment is stirred is into mold, and during its pouring molding to concrete into
Row performance test, the performance test results are shown in Table 1.
Embodiment three
In parts by mass, every cubic meter of concrete contains: 280 parts of cement, 34.816 parts of expansive agent for concrete, activity is mixed
Close 80 parts of material, 1110 parts of sand, 810 parts of stone, 175 parts of water and 3.2 parts of water-reducing agent；Wherein, 34.816 parts of expansive agent for concrete contain
There are 34 parts and 0.816 part of potassium metaaluminate of sulphoaluminate expander；80 parts of active blends contain 10 parts of flyash and zeolite powder 70
Part.
The preparation method of the present embodiment concrete preparation method referring to described in embodiment one, this is no longer going to repeat them.
And the concreting that the present embodiment is stirred is into mold, and during its pouring molding to concrete into
Row performance test, the performance test results are shown in Table 1.
Example IV
In parts by mass, every cubic meter of concrete contains: 290 parts of cement, 32.96 parts of expansive agent for concrete, activity is mixed
Close 70 parts of material, 920 parts of sand, 1000 parts of stone, 160 parts of water and 3.6 parts of water-reducing agent；Wherein, 32.96 parts of expansive agent for concrete contain
There are 32 parts of sulphoaluminate expander, 0.48 part of sodium metaaluminate and 0.48 part of potassium metaaluminate；70 parts of active blends contain flyash
30 parts and 40 parts of zeolite powder.
The preparation method of the present embodiment concrete preparation method referring to described in embodiment one, this is no longer going to repeat them.
And the concreting that the present embodiment is stirred is into mold, and during its pouring molding to concrete into
Row performance test, the performance test results are shown in Table 1.
The performance test results table of concrete during each embodiment pouring molding of table 1
As can be seen from Table 1, the concrete that embodiment one to example IV is finally prepared not bleeding, easily closely knit, tool
There are higher compression strength, and the equal no significant defect in surface.Moreover, in each embodiment concrete slump flow stability compared with
It is good, illustrate that working performance of concrete is preferable.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by present specification, or directly/it is used in other indirectly
Relevant technical field is included in scope of patent protection of the invention.
Claims (10)
1. a kind of expansive agent for concrete, which is characterized in that the expansive agent for concrete contains swelling agent base-material and additive,
The additive is meta-aluminate, and the mass ratio of the meta-aluminate and the swelling agent base-material is 1.0%-3.0%.
2. expansive agent for concrete as described in claim 1, which is characterized in that the swelling agent base-material is calcium sulphoaluminate expansion
Agent.
3. expansive agent for concrete as described in claim 1, which is characterized in that the meta-aluminate is sodium metaaluminate and inclined aluminium
At least one of sour potassium.
4. a kind of concrete, which is characterized in that in parts by mass, every cubic metre of concrete contains:
Cement, 240-300 parts；
Expansive agent for concrete as claimed any one in claims 1 to 3,15-63 parts；
Sand, 920-1110 parts；
Stone, 810-1000 parts；
2.1-3.6 parts of water-reducing agent；And
Water, 160-175 parts.
5. concrete as claimed in claim 4, which is characterized in that the cement be strength grade 42.5 portland cement or
Ordinary portland cement；And/or
The water-reducing agent is polycarboxylate water-reducer.
6. concrete as claimed in claim 4, which is characterized in that the sand is Machine-made Sand or river sand, fineness modulus 2.3-
2.8；And/or
The stone is continuous grading rubble, partial size 5mm-20mm.
7. the concrete as described in any one of claim 4 to 6, which is characterized in that in parts by mass, every cubic metre described mixed
Solidifying soil also contains 60-120 parts of active blends.
8. concrete as claimed in claim 7, which is characterized in that the active blend be in flyash and zeolite powder extremely
Few one kind.
9. a kind of preparation method of concrete, which is characterized in that the preparation method the following steps are included:
In parts by mass, 15-63 parts of expansive agent for concrete, 240-300 parts of cement, 920-1110 parts of sand, 810-1000 are provided
Part stone, 2.1-3.6 parts of water-reducing agents and 160-175 parts of water；
The expansive agent for concrete, the cement, the sand and the stone are mixed, mixed resin is obtained；
The water-reducing agent and the water are mixed, diminishing agent solution is obtained；
The diminishing agent solution is added in the mixed resin, is stirred, obtains the concrete.
10. the preparation method of concrete as claimed in claim 9, which is characterized in that in described the step of obtaining mixed resin,
It is also added into 60-120 parts of active blends.
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| CN113998936A (en) * | 2021-12-10 | 2022-02-01 | 杭州华杰商品混凝土有限公司 | High-performance anti-cracking concrete and preparation method thereof |
| CN115784691A (en) * | 2022-12-15 | 2023-03-14 | 杭州每步材料科技有限公司 | Underwater sealant for concrete and preparation method thereof |
| CN116477908A (en) * | 2023-03-01 | 2023-07-25 | 江苏苏博特新材料股份有限公司 | Quick-hardening early-strength shotcrete for high-stress tunnel support and construction application method thereof |
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| CN115784691A (en) * | 2022-12-15 | 2023-03-14 | 杭州每步材料科技有限公司 | Underwater sealant for concrete and preparation method thereof |
| CN116477908A (en) * | 2023-03-01 | 2023-07-25 | 江苏苏博特新材料股份有限公司 | Quick-hardening early-strength shotcrete for high-stress tunnel support and construction application method thereof |
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