Cold region cold weather concrete construction method

A construction method and technology in cold regions, applied in construction, building structure, construction material processing, etc., can solve problems such as weathering and denudation, concrete structure damage, etc., and achieve the effect of increasing speed, simple construction operation, and scientific and reasonable technology

Inactive Publication Date: 2017-01-04
绍兴职业技术学院
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Problems solved by technology

The concrete surface will expand and shrink, disintegrate, weather and erode under the action of freeze-thaw damage. After a long time, the overall concrete structure may be seriously damaged

Method used

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  • Cold region cold weather concrete construction method

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Embodiment Construction

[0042] 1. Construction steps:

[0043] Such as figure 1 Shown, technical scheme of the present invention is a kind of winter concrete construction method in cold area, comprises the following steps:

[0044] 1) Selection of raw materials, selection of cement, aggregate, water and admixtures;

[0045] Cement: Portland cement or ordinary Portland cement should be used for cement, the grade of which should not be lower than 42.5, and the product qualification certificate, factory inspection report and entry re-inspection report of the incoming cement should be checked;

[0046] Aggregate: The quality of coarse and fine aggregates used in concrete should meet the current national standards "Quality Standards and Inspection Methods for Crushed Stones or Pebbles for Ordinary Concrete" JGJ 53, "Quality Standards and Inspection Methods for Ordinary Concrete Sand" JGJ 52 , and its particle size should be between 5 and 25mm.

[0047] Water: Drinking water should be used for concrete ...

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Abstract

The invention belongs to the technical field of concrete construction, and particularly relates to a cold region cold weather concrete construction method. The method comprises the following steps of 1, selecting raw materials, and preparing cement, aggregate, water and an additive for use; 2, preparing tools and equipment for construction; 3, according to actual situation, adopting a matching ratio adjusting method, a heat storage and thermal insulation method, an external heating method or an additive mixing method for concrete raw material mixing; 4, constructing the heat preservation environment in the mixed concrete conveying process; 5, performing concrete pouring operation; 6, performing concrete maintenance. The method has the advantages that due to the fact that some characteristics of concrete are changed or poured concrete is subjected to external insulation measures, a traditional technology for spraying chloride on the surface of poured concrete for heat insulation is replaced, normal construction can be kept on the condition that the temperature is quite low, and the construction progress speed is increased on the premise that the quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of concrete construction, and in particular relates to a winter concrete construction method in cold regions. Background technique [0002] The quality of concrete is an important part of the quality of construction projects. The durability of concrete is an important determinant of the life of concrete engineering structures. The concrete surface will expand and shrink, disintegrate, weather and erode due to freeze-thaw damage. After a long time, the overall concrete structure may be seriously damaged. [0003] The winter in Northeast China is long and the temperature is extremely low. If you can’t find a set of effective winter concrete construction methods, you will inevitably encounter how to effectively maintain the poured concrete and how to prevent the early concrete failure during winter concrete construction. A series of issues such as freezing damage and how to ensure the strength of concrete in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/02E04G21/24
CPCE04G21/02E04G21/246
Inventor 蒋晓燕
Owner 绍兴职业技术学院
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