Anti-shrinkage concrete and preparation process thereof

A technology for concrete and anti-shrinkage, applied in the field of concrete preparation, can solve problems such as corrosion resistance and other problems, concrete cracking, etc., and achieve the effects of reducing shrinkage rate, improving strength, and improving graft reaction.

Inactive Publication Date: 2019-05-24
浙江三门永泰建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the common shrinkage of concrete, especially large-volume concrete and high-strength concrete, the performance of concrete cracking, strength, anti-seepage, and corrosion resistance is reduced.

Method used

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  • Anti-shrinkage concrete and preparation process thereof
  • Anti-shrinkage concrete and preparation process thereof
  • Anti-shrinkage concrete and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0082] The present invention discloses a method for preparing anti-shrinkage concrete, comprising the following preparation steps:

[0083] 1) Prepare water reducer in proportion:

[0084] A. Prepare the first auxiliary agent in proportion;

[0085] a. After mixing 3% maleic anhydride and 28.6% water, A mixture is prepared;

[0086] b. After mixing 18% of the sepiolite fiber and the A mixture, the B mixture is prepared;

[0087] c. After mixing 4% SPDPC and 22% dimethyl sulfoxide, add it to the B mixture to prepare the C mixture;

[0088] d. Add 12% of PSPHD, 12% of low-density polyethylene and 0.4% of titanate coupling agent to C mixture to prepare the first auxiliary agent; the titanate coupling agent is from Nanjing Nengde Chemical Co., Ltd. The titanate coupling agent sold by the company is TCA-AA75;

[0089]B. After mixing 8% of β-cyclodextrin, 12% of polyethylene glycol monomethyl ether acrylate, 8% of sodium methacrylate sulfonate, 3% of butanediol and 38.2% of wate...

Embodiment 1

[0108] The difference between Examples 10-13 and Example 1 is that the first auxiliary agent includes the following raw materials in weight percent:

[0109]

[0110] The difference between Embodiment 14-17 and Embodiment 1 is that the expansion agent includes the following raw materials in weight percentage:

[0111]

[0112] The difference between Embodiment 18-21 and Embodiment 1 is that the second auxiliary agent includes the following raw materials in weight percentage:

[0113]

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PUM

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Abstract

The invention relates to the technical field of concrete preparation and relates to anti-shrinkage concrete. The anti-shrinkage concrete is prepared from, by weight, 200-260 parts of cement, 30-45 parts of mineral powder, 70-110 parts of coal ash, 740-840 parts of yellow sand, 1000-1020 parts of gravels, 3-7 parts of a water reducing agent, 1-5 parts of an expanding agent, 1-5 parts of an antifoaming agent and 170-200 parts of water. By adjustment of a ratio of raw materials of the concrete and adding of functional additives, the concrete shrinkage rate is decreased, harmful cracks of concretestructures due to early shrinkage, dry shrinkage and cold shrinkage are effectively reduced, great crack resistance and seepage prevention effects are achieved, and accordingly concrete strength is improved.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to an anti-shrinkage concrete and a preparation process thereof. Background technique [0002] Concrete is one of the most important civil engineering materials in contemporary times and is widely used in all aspects of construction. However, due to the widespread shrinkage of concrete, especially large-volume concrete and high-strength concrete, the performance of concrete cracking, strength, anti-seepage, and corrosion resistance is reduced. Contents of the invention [0003] The purpose of the present invention is to provide a kind of anti-shrinkage concrete and its preparation process, by adjusting the ratio between the various raw materials of concrete, and adding functional admixtures, reducing the shrinkage of concrete, effectively reducing the concrete structure due to early shrinkage, Drying shrinkage and cold shrinkage produce harmful cracks, achieving good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/34
Inventor 林朝晖
Owner 浙江三门永泰建材有限公司
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