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Preparation method of anti-cracking early strength concrete for pipe gallery

A concrete and anti-cracking technology, which is applied in the field of preparation of anti-cracking and early-strength concrete for pipe gallery, can solve the problems of poor anti-seismic and anti-cracking performance, insufficient early strength of concrete, and inability to ensure that the concrete structure of the pipe gallery quickly reaches strength, etc. The effect of shortening curing time, improving anti-cracking ability and improving anti-seepage and anti-cracking performance

Active Publication Date: 2021-07-09
中化学交通建设集团市政工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the concrete in the prior art has insufficient early strength, poor anti-seismic and anti-crack performance, and cannot ensure that the concrete structure of the pipe gallery can quickly reach the strength and avoid harmful cracks. Preparation method of anti-cracking early-strength concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of anti-cracking early-strength concrete for pipe gallery proposed by the present invention comprises the following steps:

[0023] S1. In parts by weight, weigh 100 parts of raw Portland cement, 70 parts of slag cement, 380 parts of aggregate, 30 parts of synthetic fiber, 8 parts of early strength additive, 3 parts of polycarboxylate superplasticizer, dodecane 2 parts of sodium sulfonate, 100 parts of water, set aside;

[0024] S2, Portland cement, slag cement and aggregate are added in the mixer, and dry mixed for 3 minutes to obtain a dry mixture;

[0025] S3. Add synthetic fibers, early strength additives, polycarboxylate superplasticizer and sodium dodecylsulfonate to the dry mix in turn while stirring, and after mixing evenly, add water and stir until the concrete performance meets the pouring requirements;

[0026] The aggregate in the above step S1 is obtained by compounding crushed stone, sand and fly ash with a mass ratio of 3:2:1...

Embodiment 2

[0028] A kind of preparation method of anti-cracking early-strength concrete for pipe gallery proposed by the present invention comprises the following steps:

[0029] S1. In parts by weight, weigh 120 parts of raw Portland cement, 75 parts of slag cement, 400 parts of aggregate, 35 parts of synthetic fiber, 9 parts of early strength additive, 4 parts of polycarboxylate superplasticizer, dodecane 3 parts of sodium sulfonate, 150 parts of water, set aside;

[0030] S2, Portland cement, slag cement and aggregate are added in the mixer, and dry mixed for 4 minutes to obtain a dry mixture;

[0031] S3. Add synthetic fibers, early strength additives, polycarboxylate superplasticizer and sodium dodecylsulfonate to the dry mix in turn while stirring, and after mixing evenly, add water and stir until the concrete performance meets the pouring requirements;

[0032] The aggregate in the above step S1 is obtained by compounding crushed stone, sand and fly ash with a mass ratio of 3:2:1...

Embodiment 3

[0034] A kind of preparation method of anti-cracking early-strength concrete for pipe gallery proposed by the present invention comprises the following steps:

[0035] S1. In parts by weight, weigh 140 parts of raw Portland cement, 80 parts of slag cement, 440 parts of aggregate, 40 parts of synthetic fiber, 10 parts of early strength additive, 5 parts of polycarboxylate superplasticizer, dodecane 3.5 parts of sodium sulfonate, 200 parts of water, set aside;

[0036] S2, Portland cement, slag cement and aggregate are added in the mixer, and dry mixed for 5 minutes to obtain a dry mixture;

[0037] S3. Add synthetic fibers, early strength additives, polycarboxylate superplasticizer and sodium dodecylsulfonate to the dry mix in turn while stirring, and after mixing evenly, add water and stir until the concrete performance meets the pouring requirements;

[0038]In the above step S1, the aggregate is compounded by crushed stone, sand and fly ash with a mass ratio of 3:2:1; the p...

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Abstract

The invention belongs to the technical field of concrete engineering, particularly relates to a preparation method of anti-cracking early strength concrete for a pipe gallery, and solves the problems that concrete is insufficient in early strength and poor in anti-seismic and anti-cracking performance, and a pipe gallery concrete structure cannot quickly reach the strength and cannot be prevented from generating harmful cracks in the prior art. The preparation method of the anti-cracking early strength concrete for the pipe gallery comprises the steps of adding Portland cement, slag cement and aggregate into a stirrer, and mixing to obtain a dry mixture; and sequentially adding synthetic fibers, an early strength additive, a polycarboxylate superplasticizer and sodium dodecyl sulfate into the dry mixture while stirring, uniformly stirring and mixing, adding water, and stirring until the concrete performance meets the pouring requirement. The preparation method is simple, the functional advantages of all the raw materials of the concrete are fully utilized, the obtained concrete is used for pipe gallery construction, it can be effectively guaranteed that the pipe gallery concrete structure rapidly reaches the strength, meanwhile, harmful cracks are not generated, and the comprehensive performance is excellent.

Description

technical field [0001] The invention relates to the technical field of concrete engineering, in particular to a method for preparing anti-cracking early-strength concrete for a pipe gallery. Background technique [0002] The pipe corridor refers to the construction of a municipal shared tunnel under the urban road, which integrates various municipal pipelines such as electricity, communication, water supply, and gas, and implements "unified planning, unified construction, and unified management" to achieve comprehensive underground space. Utilization and sharing of resources. In order to ensure the safe operation of municipal pipelines, the construction of urban comprehensive utility corridors has entered a stage of rapid development. However, during the construction of the pipe gallery, it was found that due to the defects of insufficient early strength and poor anti-seismic cracking performance of the existing concrete, cracks of different degrees of cracking will appear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B20/02C04B16/06C04B14/42C04B24/20C04B103/10C04B111/27C04B111/34
CPCC04B28/08C04B20/023C04B16/0633C04B14/42C04B40/0039C04B2103/10C04B2201/50C04B2111/343C04B2111/27C04B7/02C04B2103/302C04B24/16C04B14/02C04B14/06C04B18/08C04B24/40C04B22/00C04B22/08C04B24/20C04B24/12
Inventor 查显卫淡智翔廖云王亚军胡雄杰王伟
Owner 中化学交通建设集团市政工程有限公司
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