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Expansive concrete for construction of ultra-long concrete structure

A technology of concrete structure and expansive concrete, applied in the field of expansive concrete, can solve the problems of insufficient concrete strength, affecting project quality, poor mixing ratio, etc., and achieve the effects of improving compression resistance, improving impermeability, and improving flexural toughness.

Inactive Publication Date: 2019-02-12
四川国泰高新管廊产业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the mixing ratio of the various components of the expansive concrete in the prior art is not very good, resulting in insufficient strength of the concrete, thereby affecting the quality of the project, and the proposed expansive concrete for super-long concrete structure construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The expansive concrete used for super-long concrete structure construction is composed of the following raw materials in parts by weight: water: 180 parts, cement: 300 parts, sand: 550 parts, gravel: 860 parts, fly ash: 105 parts, expansion agent: 35 parts parts, steel fiber: 55 parts.

[0021] The present invention also proposes expansive concrete for super-long concrete structure construction, comprising the following steps:

[0022] S1, add 300 parts of cement to the mixer, then add 180 parts of water, start the mixer, the mixing time should be 2-3 minutes, this step is pre-mixing, the purpose is to make the cement stir first, so as not to still Some cement is not mixed with water, resulting in uneven mixing;

[0023] S2, then add 550 parts of sand to the mixer. The mud content of the sand, the material of the sand body, and the content of harmful substances in the sand affect the strength and setting time of the concrete to varying degrees. The mixing time of this ...

Embodiment 2

[0029] The present invention also proposes expansive concrete for super-long concrete structure construction, comprising the following steps:

[0030] S1, add 310 parts of cement to the mixer, then add 189 parts of water, start the mixer, the mixing time should be 2-3 minutes, this step is pre-mixing, the purpose is to make the cement stir first, so as to avoid the stillness when adding raw materials later. Some cement is not mixed with water, resulting in uneven mixing;

[0031] S2, then add 620 parts of sand to the mixer. The mud content of the sand, the material of the sand body, and the content of harmful substances in the sand affect the strength and setting time of the concrete to varying degrees. The mixing time of this process is 2-3 minutes;

[0032] S3, adding 870 parts of stones, the strength and material of the stones affect the strength of the concrete and the quality of the finished concrete, the mixing time of this process is 1-3 minutes;

[0033] S4, adding 13...

Embodiment 3

[0037] The present invention also proposes expansive concrete for super-long concrete structure construction, comprising the following steps:

[0038] S1, add 343 parts of cement to the mixer, then add 175 parts of water, start the mixer, the mixing time should be 2-3 minutes, this step is pre-mixing, the purpose is to make the cement stir first, so as not to still Some cement is not mixed with water, resulting in uneven mixing;

[0039] S2, then add 566 parts of sand to the mixer. The mud content of the sand, the material of the sand body, and the harmful substance content of the sand affect the strength and setting time of the concrete to varying degrees. The mixing time of this process is 2-3 minutes;

[0040] S3, adding 878 parts of stones, the strength and material of the stones affect the strength of the concrete and the quality of the finished concrete, the mixing time of this process is 1-3 minutes;

[0041] S4, adding 145 parts of fly ash, fly ash can improve the flu...

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Abstract

The invention discloses expansive concrete for construction of an ultra-long concrete structure. The expansive concrete comprises the following raw materials in parts by weight: 180 parts of water, 300 parts of cement, 550 parts of sand, 860 parts of cobblestone, 105 parts of coal ash, 35 parts of an expanding agent, and 55 parts of steel fiber. By adding an aluminite powder expanding agent, the concrete is enabled to subjected to certain volume expansion in a hydration process, and generate cement with proper self-stress under constraint conditions, thereby enhancing the structure of ultra-long concrete.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to expansive concrete used for super-long concrete structure construction. Background technique [0002] Concrete refers to the collective name of engineering composite materials that use cementitious materials to cement aggregates into a whole. The term concrete usually refers to cement as cementitious material, sand and stone as aggregates; water (may contain admixtures) and admixtures) in a certain proportion, and the cement concrete obtained by mixing is also called ordinary concrete. [0003] In addition to the function of compensating shrinkage and generating self-stress, it is a special concrete with strong impermeability, early hardening, high later strength, and good sulfate resistance. , Expansive concrete is often used in some super-long building structures, but the mix ratio of the various components of the expansive concrete is not very good at present, resulting in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/34
CPCC04B28/02C04B2111/00293C04B2111/343C04B14/06C04B14/02C04B18/08C04B14/48C04B22/04
Inventor 彭伟王桃陈仪杨彬杨坤雷斌
Owner 四川国泰高新管廊产业投资有限公司
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