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Self-compacting concrete and preparation method thereof

A technology of self-compacting concrete and mixture, applied in the field of concrete, can solve the problems of low pumpability, low compactness and compression resistance, poor fluidity of self-compacting concrete, etc.

Inactive Publication Date: 2020-10-20
颜小淋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for general engineering, housing construction, etc., it is not necessary to use the working performance of self-compacting concrete. Compared with ordinary concrete used in general engineering, self-compacting concrete has poor fluidity, low pumpability, and compactness. Low degree and pressure resistance

Method used

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  • Self-compacting concrete and preparation method thereof
  • Self-compacting concrete and preparation method thereof
  • Self-compacting concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare the following raw material components: 136 parts of cement, 107 parts of modified mineral powder, 77 parts of coal ash, 927 parts of gravel, 204 parts of coarse sand, 469 parts of fine sand, 122 parts of water and 11.4 parts of admixture. Among them, the admixture is composed of the following raw materials in parts by weight: 4.6 parts of polycarboxylate water reducer, 2.3 parts of binder, 1.7 parts of expansion agent, 2.4 parts of nano-graphite and 1.4 parts of polystyrene nano-microspheres.

[0032] Prepare self-compacting concrete as follows:

[0033] Step 1, mixing coal ash and 1 / 2 modified slag powder evenly, then adding coarse sand and crushed stone to form an aggregate mixture;

[0034] Step 2, mixing and stirring the cement and the remaining 1 / 2 modified slag powder to obtain a slurry mixture;

[0035] Step 3, adding the slurry mixture prepared in step 2 to the aggregate mixture in step 1 and stirring evenly to obtain a mixing material;

[0036] Step 4...

Embodiment 2

[0038] Prepare the following raw materials in parts by weight: 128 parts of cement, 114 parts of modified mineral powder, 81 parts of coal ash, 886 parts of gravel, 214 parts of coarse sand, 504 parts of fine sand, 116 parts of water and 8.9 parts of admixture. The raw materials of the admixture are preferably composed of 4.6 parts of polycarboxylate water reducer, 2.3 parts of binder, 1.7 parts of expansion agent, 2.4 parts of nano-graphite and 1.4 parts of polystyrene nano-microspheres.

[0039] Self-compacting concrete was prepared according to the method of Example 1.

Embodiment 3

[0041] Prepare the following raw materials in parts by weight: 112 parts of cement, 125 parts of modified mineral powder, 85 parts of coal ash, 800 parts of gravel, 233 parts of coarse sand, 455 parts of fine sand, 110 parts of water and 8 parts of admixture.

[0042] Self-compacting concrete was prepared according to the method of Example 1.

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Abstract

The invention discloses a self-compacting concrete and a preparation method thereof. The self-compacting concrete is prepared from 112 to 154 parts of cement, 95 to 125 parts of modified mineral powder, 75 to 85 parts of coal ash, 800 to 1100 parts of broken stone, 195 to 233 parts of coarse sand, 455 to 580 parts of fine sand, 110 to 150 parts of water and 8 to 12 parts of an additive. The concrete is low in water-binder ratio, high in strength, easy to operate, small in pumping pressure and long in pumping distance, and the compactness and compressive strength of the concrete are improved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a self-compacting concrete and a preparation method thereof. Background technique [0002] At present, through the design of concrete mix ratio, the limitation of coarse and fine aggregates and the requirement of low water-binder ratio are combined with high-performance fluidized water reducer to achieve high density of concrete, which is good for the durability of concrete and the protection of steel bars. Sex has a very substantial improvement and protection. [0003] However, for general engineering, housing construction, etc., it is not necessary to use the working performance of self-compacting concrete. Compared with ordinary concrete used in general engineering, self-compacting concrete has poor fluidity, low pumpability, and compactness. The degree and resistance to pressure are low. Contents of the invention [0004] Based on the above deficiencies in the prior art,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/02C04B18/14C04B14/22
CPCC04B14/22C04B18/141C04B18/142C04B20/023C04B28/00C04B18/08C04B14/02C04B14/06C04B2103/302C04B2103/44C04B14/024C04B16/08C04B24/10Y02W30/91
Inventor 颜小淋
Owner 颜小淋
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