CN114956654A - Self-compacting concrete and concrete composite additive - Google Patents
Self-compacting concrete and concrete composite additive Download PDFInfo
- Publication number
- CN114956654A CN114956654A CN202210462011.6A CN202210462011A CN114956654A CN 114956654 A CN114956654 A CN 114956654A CN 202210462011 A CN202210462011 A CN 202210462011A CN 114956654 A CN114956654 A CN 114956654A
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- admixture
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- water reducing
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- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 239000000654 additive Substances 0.000 title claims abstract description 31
- 230000000996 additive effect Effects 0.000 title claims abstract description 30
- 239000011376 self-consolidating concrete Substances 0.000 title claims abstract description 24
- 239000004567 concrete Substances 0.000 title abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 38
- 239000000230 xanthan gum Substances 0.000 claims abstract description 30
- 229920001285 xanthan gum Polymers 0.000 claims abstract description 30
- 229940082509 xanthan gum Drugs 0.000 claims abstract description 30
- 235000010493 xanthan gum Nutrition 0.000 claims abstract description 30
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 26
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 24
- 239000008399 tap water Substances 0.000 claims abstract description 23
- 235000020679 tap water Nutrition 0.000 claims abstract description 23
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000004575 stone Substances 0.000 claims description 45
- 238000003756 stirring Methods 0.000 claims description 28
- 239000002253 acid Substances 0.000 claims description 17
- 239000004568 cement Substances 0.000 claims description 17
- 239000010881 fly ash Substances 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical group C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 6
- 239000000084 colloidal system Substances 0.000 claims description 6
- 239000000176 sodium gluconate Substances 0.000 claims description 6
- 229940005574 sodium gluconate Drugs 0.000 claims description 6
- 235000012207 sodium gluconate Nutrition 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 20
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 20
- 230000028327 secretion Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 239000002352 surface water Substances 0.000 description 10
- 206010016807 Fluid retention Diseases 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- 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 invention discloses self-compacting concrete and a concrete composite additive, wherein the composite additive comprises the following raw materials in parts by weight: 50-70 parts of water reducing agent, 0.1-0.3 part of xanthan gum, 1-2 parts of HPMC, 2-3 parts of retarder, 0.1-0.2 part of defoaming agent and 25-45 parts of tap water. The invention relates to a self-compacting concrete and a concrete composite additive, which is applied to the concrete, so that the concrete keeps the original strength, improves the cohesiveness and the water retention property, reduces the loss with time, keeps good fluidity and improves the stability of the concrete.
Description
Technical Field
The invention relates to the field of building materials, and relates to a concrete additive, in particular to a self-compacting concrete and a concrete composite additive.
Background
Concrete is one of the most widely used building materials worldwide, and modern concrete materials are revolutionarily changed due to the appearance and wide application of high-performance water reducing agents. The modern construction technology and the actual engineering requirements promote the concrete to be developed into the current large-flow concrete from the original hard and plastic concrete, and the self-compacting concrete is produced at the same time.
A series of problems still exist in the pouring use process of the self-compacting concrete, a large amount of additives are often required to be added in the mixing process of construction and construction to solve the problems of fluidity, slump loss and the like of the self-compacting concrete, wherein the concrete has strong sensitivity to the addition of a water reducing agent, and segregation and bleeding phenomena can also occur to the concrete due to improper mixing ratio, poor aggregate grading, excessive mixing of the water reducing agent and the like, the problems not only seriously affect the working performance of the concrete, but also cause engineering accidents, and affect the quality and the service life of the concrete engineering. Under the condition that resources in partial regions are deficient, the admixture technology of the cement concrete is applied to solve the problems of difficult proportioning, bleeding, poor operation performance and the like of the concrete, and the admixture technology is feasible and is also a requirement for continuously converting labor-intensive type concrete industry into technical type concrete industry.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a self-compacting concrete and a concrete composite additive, which are applied to the self-compacting concrete to maintain the original strength of the concrete, improve the cohesiveness and the water retention of the concrete, reduce the loss with time, maintain good fluidity and improve the stability of the concrete.
In order to solve the technical problems, the invention is mainly realized by the following technical scheme:
the self-compacting concrete composite additive is characterized by comprising the following components in parts by weight:
50-70 parts of water reducing agent, 0.1-0.3 part of xanthan gum, 1-2 parts of HPMC, 2-3 parts of retarder, 0.1-0.2 part of defoaming agent and 25-45 parts of tap water.
Further, the water reducing agent is a polycarboxylic acid water reducing agent, the content of the polycarboxylic acid water reducing agent is 45% -55%, and the water reducing rate is not less than 20%.
Further, the xanthan gum is an industrial grade 80-mesh instant product, and the viscosity (1%) is 1300-1700 cp. The xanthan gum has excellent water retention performance and cohesiveness, improves slump retention, reduces concrete slump loss with time, simultaneously enables water and a gel material to be uniformly and stably distributed, inhibits surface water secretion and aggregate surface water secretion, effectively reduces the water secretion rate of a concrete system, and improves the effect of later maintenance.
Further, the viscosity (1%) of HPMC is 2500-3500 cp. The HPMC is matched with xanthan gum and a water reducing agent for use, so that the fluidity of the fresh mixed material is adjusted, and a certain air entraining function is realized.
Further, the retarder is sodium gluconate.
Further, the defoaming agent is an organic silicon surfactant.
Further, the composite admixture is prepared according to the following method:
s1, weighing various raw materials for preparing the composite admixture according to parts by weight;
s2, adding a polycarboxylic acid water reducing agent and tap water into a stirring tank, adding xanthan gum and HPMC through a colloid mill, and stirring the solution for 30 min;
and S3, sequentially adding a retarder and a defoaming agent into the stirring tank, and continuously stirring for 30min to obtain the composite additive.
The self-compacting concrete comprises the following components in parts by weight:
350 parts of cement, 80-100 parts of fly ash, 1000 parts of river sand, 900 parts of mixed gravel, 150 parts of tap water, 170 parts of composite additive,
wherein the compound admixture is the compound admixture.
Further, the cement is Portland cement P.O 42.5.5; the fly ash is F type II; the river sand belongs to a zone II in a particle grading zone; the particle size of the mixed crushed stone is 5-25 mm.
Further, the mixed broken stone is formed by mixing small stones with the size of 5-10mm and large stones with the size of 10-25mm, and the weight ratio of the small stones to the large stones is 1: 1.5-1.8.
According to the invention, by adding the active ingredients such as xanthan gum and the like into the self-compacting concrete admixture, the applied concrete keeps the original strength, improves the cohesiveness and the water retention property, reduces the loss with time, keeps good fluidity and improves the stability of the concrete.
Detailed Description
The present invention will be described more clearly and completely in the following detailed description of specific embodiments of the present application, and it should be understood that the embodiments described are only a part of the present application and are not all embodiments.
Example 1
The concrete composite additive comprises the following components in parts by weight:
50 parts of water reducing agent, 0.1 part of xanthan gum, 2 parts of HPMC (hydroxy propyl methyl cellulose), 2 parts of retarder, 0.1 part of defoaming agent and 45 parts of tap water.
The water reducing agent is a polycarboxylic acid water reducing agent, the content of the polycarboxylic acid water reducing agent is 45%, and the water reducing rate is not less than 20%.
Further, the xanthan gum is an industrial grade 80-mesh instant product, and the viscosity (1%) is 1300-1700 cp. The xanthan gum has excellent water retention performance and cohesiveness, improves slump retention, reduces concrete slump loss with time, simultaneously enables water and a gel material to be uniformly and stably distributed, inhibits surface water secretion and aggregate surface water secretion, effectively reduces the water secretion rate of a concrete system, and improves the effect of later maintenance.
Further, the viscosity (1%) of HPMC is 2500-3500 cp. The HPMC is matched with xanthan gum and a water reducing agent for use, so that the fluidity of the fresh mixed material is adjusted, and a certain air entraining function is realized.
Further, the retarder is sodium gluconate.
Further, the defoaming agent is an organic silicon surfactant.
Further, the composite admixture is prepared according to the following method:
s1, weighing various raw materials for preparing the composite admixture according to parts by weight;
s2, adding a polycarboxylic acid water reducing agent and tap water into a stirring tank, adding xanthan gum and HPMC through a colloid mill, and stirring the solution for 30 min;
and S3, sequentially adding a retarder and a defoaming agent into the stirring tank, and continuously stirring for 30min to obtain the composite additive.
The self-compacting concrete comprises the following components in parts by weight:
300 parts of cement, 80 parts of fly ash, 900 parts of river sand, 900 parts of mixed crushed stone, 150 parts of tap water, 8 parts of composite additive,
wherein the composite admixture is the composite admixture.
Further, the cement is Portland cement P.O 42.5.5; the fly ash is F type II; the river sand belongs to a zone II in a particle grading zone; the particle size of the mixed crushed stone is 5-25 mm.
Further, the mixed broken stone is formed by mixing small stones with the size of 5-10mm and large stones with the size of 10-25mm, and the weight ratio of the small stones to the large stones is 1: 1.5-1.8.
And mixing and stirring the composite additive, cement, fly ash, river sand, mixed crushed stone and tap water by using an STD-60 type stirrer.
Example 2
The self-compacting concrete composite additive comprises the following components in parts by weight:
60 parts of water reducing agent, 0.2 part of xanthan gum, 2 parts of HPMC, 3 parts of retarder, 0.2 part of defoamer and 35 parts of tap water.
The water reducing agent is a polycarboxylic acid water reducing agent, the content of the polycarboxylic acid water reducing agent is 45%, and the water reducing rate is not less than 20%.
Further, the xanthan gum is an industrial grade 80-mesh instant product, and the viscosity (1%) is 1300-1700 cp. The xanthan gum has excellent water retention performance and cohesiveness, improves slump retention, reduces concrete slump loss with time, simultaneously enables water and a gel material to be uniformly and stably distributed, inhibits surface water secretion and aggregate surface water secretion, effectively reduces the water secretion rate of a concrete system, and improves the effect of later maintenance.
Further, the viscosity (1%) of HPMC is 2500-3500 cp. The HPMC is matched with xanthan gum and a water reducing agent for use, so that the fluidity of the fresh mixed material is adjusted, and a certain air entraining function is realized.
Further, the retarder is sodium gluconate.
Further, the defoaming agent is an organic silicon surfactant.
Further, the composite additive is prepared according to the following method:
s1, weighing various raw materials for preparing the composite admixture according to parts by weight;
s2, adding a polycarboxylic acid water reducing agent and tap water into a stirring tank, adding xanthan gum and HPMC through a colloid mill, and stirring the solution for 30 min;
and S3, sequentially adding a retarder and a defoaming agent into the stirring tank, and continuously stirring for 30min to obtain the composite additive.
The self-compacting concrete comprises the following components in parts by weight:
350 parts of cement, 100 parts of fly ash, 800 parts of river sand, 850 parts of mixed crushed stone, 170 parts of tap water and 10 parts of composite additive,
wherein the composite admixture is the composite admixture.
Further, the cement is Portland cement P.O 42.5.5; the fly ash is F type II; the river sand belongs to a zone II in a particle grading zone; the particle size of the mixed crushed stone is 5-25 mm.
Further, the mixed broken stone is formed by mixing small stones with the size of 5-10mm and large stones with the size of 10-25mm, and the weight ratio of the small stones to the large stones is 1: 1.5-1.8.
And mixing and stirring the composite additive, cement, fly ash, river sand, mixed crushed stone and tap water by using an STD-60 type stirrer.
Example 3
The self-compacting concrete composite additive comprises the following components in parts by weight:
70 parts of water reducing agent, 0.3 part of xanthan gum, 1 part of HPMC, 2 parts of retarder, 0.1 part of defoamer and 40 parts of tap water.
The water reducing agent is a polycarboxylic acid water reducing agent, the content of the polycarboxylic acid water reducing agent is 45%, and the water reducing rate is not less than 20%.
Further, the xanthan gum is an industrial grade 80-mesh instant product, and the viscosity (1%) is 1300-1700 cp. The xanthan gum has excellent water retention performance and cohesiveness, improves slump retention, reduces concrete slump loss with time, simultaneously enables water and a gel material to be uniformly and stably distributed, inhibits surface water secretion and aggregate surface water secretion, effectively reduces the water secretion rate of a concrete system, and improves the effect of later maintenance.
Further, the viscosity (1%) of HPMC is 2500-3500 cp. The HPMC is matched with xanthan gum and a water reducing agent for use, so that the fluidity of the fresh mixed material is adjusted, and a certain air entraining function is realized.
Further, the retarder is sodium gluconate.
Further, the defoaming agent is an organic silicon surfactant.
Further, the composite admixture is prepared according to the following method:
s1, weighing various raw materials for preparing the composite admixture according to parts by weight;
s2, adding a polycarboxylic acid water reducing agent and tap water into a stirring tank, adding xanthan gum and HPMC through a colloid mill, and stirring the solution for 30 min;
and S3, sequentially adding a retarder and a defoaming agent into the stirring tank, and continuously stirring for 30min to obtain the composite additive.
The self-compacting concrete comprises the following components in parts by weight:
320 parts of cement, 95 parts of fly ash, 1000 parts of river sand, 800 parts of mixed crushed stone, 155 parts of tap water and 9 parts of composite additive,
wherein the composite admixture is the composite admixture.
Further, the cement is Portland cement P.O 42.5.5; the fly ash is F type II; the river sand belongs to a zone II in a particle grading zone; the particle size of the mixed crushed stone is 5-25 mm.
Further, the mixed broken stone is formed by mixing small stones with the size of 5-10mm and large stones with the size of 10-25mm, and the weight ratio of the small stones to the large stones is 1: 1.5-1.8.
And mixing and stirring the composite additive, cement, fly ash, river sand, mixed crushed stone and tap water by using an STD-60 type stirrer.
Example 4
The self-compacting concrete composite additive comprises the following components in parts by weight:
55 parts of water reducing agent, 0.2 part of xanthan gum, 2 parts of HPMC (hydroxy propyl methyl cellulose), 3 parts of retarder, 0.2 part of defoaming agent and 30 parts of tap water.
The water reducing agent is a polycarboxylic acid water reducing agent, the content of the polycarboxylic acid water reducing agent is 45%, and the water reducing rate is not less than 20%.
Further, the xanthan gum is an industrial grade 80-mesh instant product, and the viscosity (1%) is 1300-1700 cp. The xanthan gum has excellent water retention performance and cohesiveness, improves slump retention, reduces concrete slump loss with time, simultaneously enables water and a gel material to be uniformly and stably distributed, inhibits surface water secretion and aggregate surface water secretion, effectively reduces the water secretion rate of a concrete system, and improves the effect of later maintenance.
Further, the viscosity (1%) of HPMC is 2500-3500 cp. The HPMC is matched with xanthan gum and a water reducing agent for use, so that the fluidity of the fresh mixed material is adjusted, and a certain air entraining function is realized.
Further, the retarder is sodium gluconate.
Further, the defoaming agent is an organic silicon surfactant.
Further, the composite additive is prepared according to the following method:
s1, weighing various raw materials for preparing the composite admixture according to parts by weight;
s2, adding a polycarboxylic acid water reducing agent and tap water into a stirring tank, adding xanthan gum and HPMC through a colloid mill, and stirring the solution for 30 min;
and S3, sequentially adding a retarder and a defoaming agent into the stirring tank, and continuously stirring for 30min to obtain the composite additive.
The self-compacting concrete comprises the following components in parts by weight:
345 parts of cement, 85 parts of fly ash, 950 parts of river sand, 880 parts of mixed crushed stone, 165 parts of tap water, 10 parts of a composite additive,
wherein the compound admixture is the compound admixture.
Further, the cement is Portland cement P.O 42.5.5; the fly ash is F type II; the river sand belongs to a zone II in a particle grading zone; the particle size of the mixed crushed stone is 5-25 mm.
Further, the mixed broken stone is formed by mixing small stones with the size of 5-10mm and large stones with the size of 10-25mm, and the weight ratio of the small stones to the large stones is 1: 1.5-1.8.
And mixing and stirring the composite additive, cement, fly ash, river sand, mixed crushed stone and tap water by using an STD-60 type stirrer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the illustrated embodiments, but rather should be construed in the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. The self-compacting concrete composite additive is characterized by comprising the following components in parts by weight:
50-70 parts of water reducing agent, 0.1-0.3 part of xanthan gum, 1-2 parts of HPMC, 2-3 parts of retarder, 0.1-0.2 part of defoaming agent and 25-45 parts of tap water.
2. The compound admixture of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent with a content of 45-55% and a water reducing rate of not less than 20%.
3. The composite admixture as defined in claim 1, wherein said xanthan gum is industrial grade 80 mesh instant product with viscosity of 1300-1700 cp.
4. The composite admixture according to claim 1, wherein said HPMC has a viscosity of 2500-3500 cp.
5. The compound admixture of claim 1, wherein the retarder is sodium gluconate.
6. The compound admixture according to claim 1, wherein the antifoaming agent is a silicone surfactant.
7. The compound admixture according to claim 1, which is prepared by the following method:
s1, weighing various raw materials for preparing the composite admixture according to parts by weight;
s2, adding a polycarboxylic acid water reducing agent and tap water into a stirring tank, adding xanthan gum and HPMC through a colloid mill, and stirring the solution for 30 min;
and S3, sequentially adding a retarder and a defoaming agent into the stirring tank, and continuously stirring for 30 min.
8. The self-compacting concrete is characterized by comprising the following components in parts by weight:
300-350 parts of cement, 80-100 parts of fly ash, 800-1000 parts of river sand, 900 parts of mixed broken stone, 150-170 parts of tap water, 8-10 parts of composite admixture,
wherein the compound admixture is the compound admixture as claimed in any one of the claims 1 to 7.
9. A self-compacting concrete according to claim 8, wherein said cement is portland cement P.O 42.5.5; the fly ash is F type II; the river sand belongs to a zone II in a particle grading zone; the particle size of the mixed crushed stone is 5-25 mm.
10. The self-compacting concrete according to claim 9, wherein the mixed crushed stones are formed by mixing small stones with a size of 5-10mm and large stones with a size of 10-25mm, and the weight ratio of the small stones to the large stones is 1: 1.5-1.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210462011.6A CN114956654A (en) | 2022-04-29 | 2022-04-29 | Self-compacting concrete and concrete composite additive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210462011.6A CN114956654A (en) | 2022-04-29 | 2022-04-29 | Self-compacting concrete and concrete composite additive |
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| CN114956654A true CN114956654A (en) | 2022-08-30 |
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| CN202210462011.6A Pending CN114956654A (en) | 2022-04-29 | 2022-04-29 | Self-compacting concrete and concrete composite additive |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06219809A (en) * | 1993-01-29 | 1994-08-09 | Sumitomo Cement Co Ltd | Production of self-packing concrete |
| CN1792978A (en) * | 2005-12-08 | 2006-06-28 | 贵州省公路工程总公司 | Machine-made sand self-compacting concrete |
| CN107500678A (en) * | 2017-09-30 | 2017-12-22 | 广西路桥工程集团有限公司 | A kind of self-compacting concrete |
| CN107572957A (en) * | 2017-09-15 | 2018-01-12 | 广西路桥工程集团有限公司 | A kind of self-compaction non-shrinking steel pipe concrete |
| CN110903056A (en) * | 2018-09-18 | 2020-03-24 | 武汉源锦商品混凝土有限公司 | High-strength self-compacting fair-faced concrete and preparation method thereof |
-
2022
- 2022-04-29 CN CN202210462011.6A patent/CN114956654A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06219809A (en) * | 1993-01-29 | 1994-08-09 | Sumitomo Cement Co Ltd | Production of self-packing concrete |
| CN1792978A (en) * | 2005-12-08 | 2006-06-28 | 贵州省公路工程总公司 | Machine-made sand self-compacting concrete |
| CN107572957A (en) * | 2017-09-15 | 2018-01-12 | 广西路桥工程集团有限公司 | A kind of self-compaction non-shrinking steel pipe concrete |
| CN107500678A (en) * | 2017-09-30 | 2017-12-22 | 广西路桥工程集团有限公司 | A kind of self-compacting concrete |
| CN110903056A (en) * | 2018-09-18 | 2020-03-24 | 武汉源锦商品混凝土有限公司 | High-strength self-compacting fair-faced concrete and preparation method thereof |
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Application publication date: 20220830 |