CN108059410A - A kind of self-compacting concrete and preparation method thereof - Google Patents
A kind of self-compacting concrete and preparation method thereof Download PDFInfo
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- CN108059410A CN108059410A CN201810000503.7A CN201810000503A CN108059410A CN 108059410 A CN108059410 A CN 108059410A CN 201810000503 A CN201810000503 A CN 201810000503A CN 108059410 A CN108059410 A CN 108059410A
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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
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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
- 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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- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to building material technical fields, are specially a kind of self-compacting concrete and preparation method thereof, with preferable mobility and higher compression strength.Drip irrigation device is that every cubic metre of self-compacting concrete includes following component：155 170kg of water；350 400 kg of cement；700 800 kg of sand material；960 1000 kg of building stones；160 200 kg of mineral admixture；57 kg of additive；14 kg of superfine powder；25 kg of modifying agent.Various raw materials centainly to match mixed preparing concrete, are made it have higher gap percent of pass and self-compaction ability, can freely trickled, be sufficient filling with inside configuration space, form the structure of packed uniform by the present invention；And pass through and superfine powder is added into concrete, further improve the mobility of concrete, while improve its compression strength.
Description
Technical field
The present invention relates to building material technical field, more particularly to a kind of self-compacting concrete and preparation method thereof.
Background technology
Self-compacting concrete that is, with high fluidity, uniformity and stability, vibrates when pouring without external force, can
It is flowed under Gravitative Loads and is full of the concrete of templatespace.
Patent of invention if publication No. is CN105801053A discloses a kind of flyash in great mixed amount C40 self-compaction coagulations
Soil improves working performance of concrete by adding polycarboxylic acid series additive and a large amount of flyash in cement, sandstone, drops
Low hydration heat of cement improves concrete durability.And its self-compacting concrete strength prepared reaches 40- in 7d
Reach 50-62 Mpa when 47Mpa, 28d.
But it can be seen from the above, its compression strength can not reach existing mixed by the self-compacting concrete of this scheme preparation
Requirement of the solidifying soil to compression strength, technical solution are further improved.
The content of the invention
The first object of the present invention is to provide a kind of self-compacting concrete, with good mobility, while have compared with
High compression strength.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 155-170kg；
Cement 350-400 kg；
Sand material 700-800 kg；
Building stones 960-1000 kg；
Mineral admixture 160-200 kg；
Additive 5-7 kg；
Superfine powder 1-4 kg；
Modifying agent 2-5 kg.
By using above-mentioned technical proposal, by aggregates such as cement, sand, stones, with admixture, additive etc. with certain proportioning
Mixed preparing concrete, make concrete mix shear stress and plastic viscosity keep within the specific limits, make it have compared with
High gap percent of pass and self-compaction ability, meanwhile, in the case of high flowability not bleeding, do not isolate, be not hardened, can from
By trickling, inside configuration space is sufficient filling with, forms the structure of packed uniform；And pass through and superfine powder is added into concrete,
Further improve the mobility of concrete, while improve its compression strength.
Further, the sand material selects sand in the low basic active mechanism that modulus of fineness is 2.3-2.8.
By using above-mentioned technical proposal, by the modulus of fineness control of sand material within the specific limits, make the grain size ruler of sand material
Very little to be close, in this way, the concrete density made is preferable, and end face is more smooth.
Further, the building stones select the low basic active machine rubble of two kinds of gradings of 5-16mm and 5-25mm to mix.
By using above-mentioned technical proposal, the specification of building stones is limited, so as to adjust the voidage between building stones, to change
The workability of kind concrete.
Further, the weight ratio of the low basic active machine rubbles of 5-16mm basic active machine rubble low with 5-25mm is 1:1.
By using above-mentioned technical proposal, under the conditions of the ratio, the voidage between building stones is smaller, and concrete and it is easy
Property performance is preferable.
Further, the mineral admixture is I grades of flyash and the mixture of S75 miberal powders.
It is by using above-mentioned technical proposal, I grades of flyash and S75 miberal powders are compound according to a certain percentage, it utilizes " double-doped "
Synergistic effect improve the mobility of concrete, microcellular structure, so as to improve the closely knit performance of concrete.
Further, the additive is polycarboxylic acids conditioning agent.
By using above-mentioned technical proposal, acted on using the special electrical charge rejection and space obstacle of polycarboxylic acids, to make coagulation
Soil divergence and through when keep excellent, make its workability close to perfect condition.
Further, the superfine powder is stannic oxide or zirconium boride.
By using above-mentioned technical proposal, superfine powder is added in concrete, cement granules in concrete can be reduced
Between degree of being adhered, change the mobility of concrete.
Further, the modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid.
By using above-mentioned technical proposal, superfine powder is modified using absolute ethyl alcohol and fluorocarboxylic acid, to change
The charge on superfine powder surface, so as to further improve the mobility in concrete between cement granules, improve concrete from close
Real performance.
It is a further object of the present invention to provide a kind of preparation methods of self-compacting concrete, include the following steps：
S1：Water, cement, sand material, building stones, mineral admixture and additive are mixed, obtain mixture；
S2：Superfine powder is added in the mixed liquor of water and absolute ethyl alcohol, and be heated to 40 DEG C；
S3：Fluorocarboxylic acid, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly.
By using above-mentioned technical proposal, superfine powder is pre-processed first with absolute ethyl alcohol, afterwards, fluoro carboxylic
Acid is chemically reacted with superfine powder, and the in vivo chemical bond of superfine powder is changed, and surface charge amount changes, superfine powder
The performance of body treated concrete is also more stablized.
Further, the volume ratio of water and absolute ethyl alcohol is 2 in S2:3.
By using above-mentioned technical proposal, in the ethanol solution of the concentration, the pretreating effect of superfine powder is more preferable, fluorine
Reaction for carboxylic acid and superfine powder is more abundant.
In conclusion the invention has the advantages that：
1. by by aggregates such as cement, sand, stones, with admixture, additive etc. with certain proportioning mixed preparing concrete, make to mix
The shear stress and plastic viscosity of solidifying soil mixture keep within the specific limits, making it have higher gap percent of pass and from close
Real ability, meanwhile, in the case of high flowability not bleeding, do not isolate, be not hardened, can freely trickle, be sufficient filling with structure
Inner space forms the structure of packed uniform；
2. by adding superfine powder into concrete, further improve the mobility of concrete, while improve its compression strength；
3. superfine powder is modified using absolute ethyl alcohol and fluorocarboxylic acid, to change the charge on superfine powder surface, so as to
Further improve the mobility in concrete between cement granules, improve the self-compacting ability of concrete.
Specific embodiment
The present invention is described in further detail with reference to embodiments.
The present invention discloses a kind of self-compacting concretes and preparation method thereof.
Embodiment 1：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 155kg；
360 kg of cement；
750 kg of sand material；
980 kg of building stones；
160 kg of mineral admixture；
6 kg of additive；
2 kg of superfine powder；
2 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.3 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 1:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 2:1；Additive is polycarboxylic acids conditioning agent；Superfine powder
For stannic oxide；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 5:2.
Its preparation method is：
S1：By 155 kg water, 360 kg cement, 750 kg sand material, 980 kg building stones, 160 kg mineral admixtures and the poly- carboxylics of 6 kg
Acid regulator is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
2 kg stannic oxides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Embodiment 2：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 160kg；
400 kg of cement；
800 kg of sand material；
960 kg of building stones；
180 kg of mineral admixture；
6 kg of additive；
1 kg of superfine powder；
2 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.5 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 1:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 3:2；Additive is polycarboxylic acids conditioning agent；Superfine powder
For zirconium boride；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 5:2.
Its preparation method is：
S1：By 160 kg water, 400kg cement, 800 kg sand material, 980 kg building stones, 180 kg mineral admixtures and the poly- carboxylics of 6 kg
Acid regulator is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
1 kg zirconium borides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Embodiment 3：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 170kg；
380 kg of cement；
700 kg of sand material；
970 kg of building stones；
200 kg of mineral admixture；
5 kg of additive；
3 kg of superfine powder；
3 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.8 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 2:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 1:1；Additive is polycarboxylic acids conditioning agent；Superfine powder
For stannic oxide；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 5:2.
Its preparation method is：
S1：By 170 kg water, 380kg cement, 700 kg sand material, 970 kg building stones, 200 kg mineral admixtures and the poly- carboxylics of 5 kg
Acid regulator is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
3 kg stannic oxides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Embodiment 4：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 170kg；
350 kg of cement；
700 kg of sand material；
970 kg of building stones；
200 kg of mineral admixture；
6 kg of additive；
3 kg of superfine powder；
4 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.7 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 2:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 1:1；Additive is polycarboxylic acids conditioning agent；Superfine powder
For zirconium boride；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 5:2.
Its preparation method is：
S1：By 170 kg water, 350kg cement, 700 kg sand material, 970 kg building stones, 200 kg mineral admixtures and the poly- carboxylics of 6 kg
Acid regulator is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
3 kg zirconium borides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Embodiment 5：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 170kg；
350 kg of cement；
700 kg of sand material；
1000 kg of building stones；
200 kg of mineral admixture；
6 kg of additive；
3 kg of superfine powder；
5 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.6 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 1:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 1:1；Additive is polycarboxylic acids conditioning agent；Superfine powder
For stannic oxide；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 3:1.
Its preparation method is：
S1：By 170 kg water, 350kg cement, 700 kg sand material, 1000 kg building stones, 200 kg mineral admixtures and the poly- carboxylics of 6 kg
Acid regulator is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
3 kg stannic oxides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Embodiment 6：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 170kg；
350 kg of cement；
700 kg of sand material；
1000 kg of building stones；
200 kg of mineral admixture；
7 kg of additive；
3 kg of superfine powder；
5 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.6 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 1:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 1:1；Additive is polycarboxylic acids conditioning agent；Superfine powder
For stannic oxide；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 3:1.
Its preparation method is：
S1：By 170 kg water, 350kg cement, 700 kg sand material, 1000 kg building stones, 200 kg mineral admixtures and the poly- carboxylics of 7 kg
Acid regulator is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
3 kg stannic oxides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Embodiment 7：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 170kg；
350 kg of cement；
700 kg of sand material；
1000 kg of building stones；
200 kg of mineral admixture；
7 kg of additive；
4 kg of superfine powder；
5 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.6 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 1:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 1:1；Additive is polycarboxylic acids conditioning agent；Superfine powder
For zirconium boride；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 3:1.
Its preparation method is：
S1：By 170 kg water, 350kg cement, 700 kg sand material, 1000 kg building stones, 200 kg mineral admixtures and the poly- carboxylics of 7 kg
Acid regulator is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
4 kg zirconium borides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Embodiment 8：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 160kg；
380 kg of cement；
750 kg of sand material；
980 kg of building stones；
180 kg of mineral admixture；
6.2 kg of additive；
3 kg of superfine powder；
4 kg of modifying agent.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.5 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 1:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 1:1；Additive is polycarboxylic acids conditioning agent；Superfine powder
For stannic oxide；Modifying agent includes absolute ethyl alcohol and fluorocarboxylic acid, and the two weight ratio is 3:1.
Its preparation method is：
S1：160 kg water, 380kg cement, 750 kg sand material, 980 kg building stones, 180 kg mineral admixtures and 6.2 kg are gathered
Carboxylic acid conditioning agent is mixed, and obtains mixture；
S2：According to required absolute ethyl alcohol amount in modifying agent, dose volume ratio is 2:3 water and the mixed liquor of absolute ethyl alcohol, and to
3 kg stannic oxides are wherein added in, are heated to 40 DEG C；
S3：The desired amount of fluorocarboxylic acid in modifying agent, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly, is obtained self-compacting concrete.
Blank test 1：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 155kg；
360 kg of cement；
750 kg of sand material；
980 kg of building stones；
160 kg of mineral admixture；
6 kg of additive.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.3 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 1:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 2:1；Additive is polycarboxylic acids conditioning agent.
Its preparation method is：
By 155 kg water, 360 kg cement, 750 kg sand material, 980 kg building stones, 160 kg mineral admixtures and 6 kg polycarboxylic acids
Conditioning agent is mixed, and obtains self-compacting concrete.
Blank test 2：
A kind of self-compacting concrete, every cubic metre of self-compacting concrete include following component：
Water 170kg；
350 kg of cement；
700 kg of sand material；
970 kg of building stones；
200 kg of mineral admixture；
6 kg of additive.
Wherein p.042.5 cement, sand material select sand in the low basic active mechanism that modulus of fineness is 2.7 to cement selection；Building stones
The low basic active machine macadam-aggregate mix of two kinds of gradings of 5-16mm and 5-25mm is selected, and the two weight ratio is 2:1；Mineral admixture
For I grades of flyash and the mixture of S75 miberal powders, and the two weight ratio is 1:1；Additive is polycarboxylic acids conditioning agent.
Its preparation method is：
S1：By 170 kg water, 350kg cement, 700 kg sand material, 970 kg building stones, 200 kg mineral admixtures and the poly- carboxylics of 6 kg
Acid regulator is mixed, and obtains self-compacting concrete.
Detection method：
Divergence detects：GB/T50080-2002 《Standard for test methods of properties of ordinary concrete mixture》.
Compression strength detects：GBJ81-85 《Normal concrete mechanical test method》.
Emptying time：GB/T50080-2016 《Standard for test methods of properties of ordinary concrete mixture standard》.
Testing result is as shown in the table：
As seen from the above table, the self-compacting concrete for preparing of the present invention its with preferable divergence and compression strength, particularly exist
Divergence after the self-compacting concrete prepared under the conditions of embodiment 8, initial extension degree and placement 2h is than other implementations
Under the conditions of it is larger, compression strength is also higher, and emptying time is shorter.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of self-compacting concrete, it is characterised in that：Every cubic metre of self-compacting concrete includes measuring component as follows：
Water 155-170kg；
Cement 350-400 kg；
Sand material 700-800 kg；
Building stones 960-1000 kg；
Mineral admixture 160-200 kg；
Additive 5-7 kg；
Superfine powder 0.5-2 kg；
Modifying agent 0.1-0.5 kg.
2. a kind of self-compacting concrete according to claim 1, it is characterised in that：The sand material selects the modulus of fineness to be
Sand in the low basic active mechanism of 2.3-2.8.
3. a kind of self-compacting concrete according to claim 1, it is characterised in that：The building stones select the low alkali of 5-25mm to live
Property machine rubble.
4. a kind of self-compacting concrete according to claim 1, it is characterised in that：The building stones select 5-16mm and 5-
The low basic active machine rubble of two kinds of gradings of 25mm mixes.
5. a kind of self-compacting concrete according to claim 4, it is characterised in that：The low basic active machine rubbles of 5-16mm and 5-
The ratio of the low basic active machine rubbles of 25mm is 1:1.
6. a kind of self-compacting concrete according to claim 1, it is characterised in that：The additive is adjusted for polycarboxylic acids
Agent.
7. a kind of self-compacting concrete according to claim 1, it is characterised in that：The superfine powder for stannic oxide or
Zirconium boride.
8. a kind of self-compacting concrete according to claim 1, it is characterised in that：The modifying agent include absolute ethyl alcohol and
Fluorocarboxylic acid.
9. a kind of self-compacting concrete preparation method, it is characterised in that：Include the following steps：
S1：Water, cement, sand material, building stones, admixture and additive are mixed, obtain mixture；
S2：Superfine powder is added in the mixed liquor of water and absolute ethyl alcohol, and be heated to 40 DEG C；
S3：Fluorocarboxylic acid, 40 DEG C of isothermal reaction 20min are added in mixed liquor into S2；
S4：The reaction solution that S3 is obtained is added in the mixture of S1, is stirred evenly.
10. a kind of self-compacting concrete preparation method according to claim 9, it is characterised in that：Water and anhydrous second in S2
The volume ratio of alcohol is 2:3.
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| CN201810000503.7A CN108059410A (en) | 2018-01-02 | 2018-01-02 | A kind of self-compacting concrete and preparation method thereof |
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| CN201810000503.7A Pending CN108059410A (en) | 2018-01-02 | 2018-01-02 | A kind of self-compacting concrete and preparation method thereof |
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Cited By (1)
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| CN113402189A (en) * | 2021-07-21 | 2021-09-17 | 深圳市鲲鹏环保科技有限公司 | Machine-made sand and stone secondary crushing and secondary screening production process |
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