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Self-compacting concrete for pumping

A self-compacting concrete and concrete technology, applied in the field of construction, can solve problems such as difficult quality assurance, and achieve the effect of fast strength, good fluidity and improved slump in the later stage

Inactive Publication Date: 2020-12-15
周兆弟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The operation of concrete in the production process of solid square piles is generally manual operation, including mixing, feeding and vibrating of concrete, which is easy to cause large errors and difficult to guarantee the quality

Method used

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  • Self-compacting concrete for pumping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a self-compacting concrete for pumping, which includes pumping basic concrete components, mineral admixtures mixed with the pumping basic concrete, and admixtures, with a capacity of 2550 kg per cubic meter.

[0033] Among them, the pumping foundation concrete includes the following ingredients in parts by weight: 305 parts of PII 52.5 cement, 797 parts of fine aggregate, 1202 parts of coarse aggregate, 125 parts of water and 8.5 parts of naphthalenesulfonate superplasticizer. Sand with a degree modulus of 2.2-3.7 and a mud content of no more than 1%; coarse aggregates are continuously graded stones with a maximum particle size of no more than 1 / 3 of the inner diameter of the pumping pipe and a mud content of no more than 1%.

[0034] The mineral admixture accounts for 3-5% of the total weight. The mineral admixture includes at least a mixture of oxides and inorganic acid salts containing Si, Al, Fe, Ca. Specifically, the mineral admixture includ...

Embodiment 2

[0037] This embodiment provides a self-compacting concrete for pumping, which includes pumping basic concrete components and mineral admixtures mixed with the pumping basic concrete, and also includes admixtures, with a capacity of 2580 kg per cubic meter.

[0038] Among them, the pumping foundation concrete includes the following components by weight: 275 parts of PII 52.5 cement, 818 parts of fine aggregate, 1165 parts of coarse aggregate, 132 parts of water and 7.2 parts of naphthalenesulfonate superplasticizer. Sand with a degree modulus of 2.5-3.5 and a mud content of no more than 1%; coarse aggregates are continuously graded stones with a particle size of 1-2cm and a mud content of no more than 1%.

[0039] The mineral admixture accounts for 3-5% of the total weight. The mineral admixture includes at least a mixture of oxides and inorganic acid salts containing Si, Al, Fe, Ca. Specifically, the mineral admixture includes the following powder by weight 50 parts of coal as...

Embodiment 3

[0042] This embodiment provides a self-compacting concrete for pumping, which includes pumping basic concrete components and mineral admixtures mixed with the pumping basic concrete, and also includes admixtures, with a capacity of 2530 kg per cubic meter.

[0043] Among them, the pumping foundation concrete includes the following components by weight: 328 parts of PII 52.5 cement, 835 parts of fine aggregate, 1235 parts of coarse aggregate, 142 parts of water and 5.6 parts of naphthalenesulfonate superplasticizer, and the fine aggregate is made of fine Sand with a degree modulus of 2.8-3.2 and a mud content of no more than 1%; coarse aggregate uses stones with a particle size of 1-2cm and a mud content of no more than 1%.

[0044] The mineral admixture accounts for 5-10% of the total weight. The mineral admixture includes a mixture containing at least Si, Al, Fe, Ca oxides and inorganic acid salts. Specifically, the mineral admixture includes the following powder by weight 51...

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Abstract

The invention discloses self-compacting concrete for pumping, which comprises a pumping base concrete component and a mineral admixture mixed with the pumping base concrete, the mineral admixture accounts for 3-10% of the total weight, the mineral admixture comprises a mixture of oxide at least containing Si, Al, Fe, Ca and S and inorganic acid salt, and the mineral admixture also comprises an additive accounting for not more than 0.5% of the total weight. The mineral admixture is combined into different oxides or inorganic acid salts, different activities, surface effects, filling effects orvolcanic ash effects are achieved, and when the mineral admixture is mixed into the self-compacting concrete, the slump, work-ability, cohesiveness, segregation resistance and later strength of the self-compacting concrete can be improved; the concrete has better flow-ability, compactness and homogeneity, and the production requirement of a solid square pile is met; the curing speed and the strength increasing speed of the concrete are increased, the curing time of the concrete is shortened, and the effect of rapid curing in the autoclaving-free process is achieved.

Description

technical field [0001] The invention relates to the construction field, in particular to a self-compacting concrete for pumping. Background technique [0002] Self-compacting concrete is a kind of concrete with high fluidity, uniformity, stability and appropriate viscosity. It is not easy to segregate. It can fill any gap in the formwork with steel bars and compact itself under the action of gravity. It belongs to a category of high-performance concrete. Its outstanding feature is that the mixture has good working performance. Even under the condition of dense reinforcement and complex shape, it can be uniformly and densely filled and formed only by its own weight without vibration, which brings great convenience to the construction operation. At the same time, it has technical and economic effects such as improving the quality of concrete, improving the construction environment, speeding up the construction progress, increasing labor productivity, and reducing project costs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00146C04B2201/52C04B18/08C04B18/141C04B22/143C04B14/02C04B14/06C04B24/226C04B2103/12C04B2103/22C04B2103/304C04B2103/44C04B2103/0068C04B2103/50C04B22/064C04B18/146C04B14/106C04B14/24C04B2103/308C04B18/142C04B14/047
Inventor 周兆弟
Owner 周兆弟
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