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Highly-antifreezing highly-slump retaining self-compacting C40 concrete

A concrete, high frost-resistant technology, applied in the field of building materials, can solve the problem that the frost-resistant performance, strength and pumping performance cannot meet the ice rink.

Active Publication Date: 2014-09-24
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For general construction concrete, its comprehensive indicators such as antifreeze performance, strength and pumping performance cannot meet the use of ice rinks. Demand for speed skating and other ice sports

Method used

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  • Highly-antifreezing highly-slump retaining self-compacting C40 concrete

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Embodiment Construction

[0024] Below we will further elaborate on the frost-resistant self-compacting concrete of the present invention in combination with specific examples, in order to understand its structural coordination and functional characteristics more clearly, but this cannot limit its protection scope.

[0025] The invention is a self-compacting C40 concrete with high frost resistance and high slump retention. The concrete includes cement, slag powder, fly ash, sand, stones, additives and water.

[0026] One of the most important components and proportions are as follows:

[0027] Composition unilateral dosage ratio (kg / m 3 )

[0028] Cement 330

[0029] Granulated blast furnace slag powder 80

[0030] Fly Ash 80

[0031] Natural medium sand with a fineness modulus of 2.3-3.0 830

[0032] Pebbles 920

[0033] Admixture 4.9

[0034] Mix water 160.

[0035] Ordinary Portland cement P.O42.5 is used as the cement in the antifreeze self-compacting C40 concrete used in the skating rink o...

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Abstract

The invention relates to highly-antifreezing highly-slump retaining self-compacting C40 concrete which comprises the following components by kg / m3: 330 parts of cement, 80 parts of granulated blast-furnace slag, 80 parts of fly ash, 830 parts of natural medium sand with a fineness modulus of 2.3-3.0, 920 parts of stone, 4.9 parts of additives, and 160 parts of mixing water; the additive is a modified air-entraining polycarboxylic water reducer, wherein the mixing amount of an air-entraining agent in the polycarboxylic water reducer RP325 is 0.1%, and the mixing amount of the additive for large-scale production is 1.0% of the total amount of gel materials; the air content in the concrete is 5.0%+ / -1.0%; the air-entraining amount in the poured structure from the beginning to the third hour is stabilized within a range of 5.0%+ / -1.0%, and the concrete expansion degree in 3 hours is maintained at 600+ / -50 mm; the number of antifreezing cycle is not less than 150, and the lowest temperature and the highest temperature in the antifreezing cycle are respectively -18 DEG C and 35 DEG C. The concrete of the invention can meet the concrete performance requirements for a skating rink in Shanghai oriental sports center with respect to high slump retaining performance, self-compacting performance, strength performance, high antifreezing performance, and the like.

Description

technical field [0001] The invention relates to building materials, in particular to a self-compacting C40 concrete with high frost resistance and high slump retention. Background technique [0002] The concrete used on the specially designed skating rink in the sports center needs to have higher requirements, and the strength, freezing resistance and self-compacting performance of the concrete must meet the corresponding standards. Therefore, the corresponding concrete type must be designed for the specific project. [0003] For general construction concrete, its comprehensive indicators such as antifreeze performance, strength and pumping performance cannot meet the use of ice rinks. Speed ​​skating and other ice sports needs. Contents of the invention [0004] The purpose of the present invention is to overcome the need that the current general concrete cannot be applied to the ice rink, and provide a new type of self-compacting concrete with strong antifreeze perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 吴德龙陈建大刘秀红沈剑峰卞成辉
Owner TONGJI UNIV
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