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A kind of self-compacting concrete and preparation method thereof

A self-compacting concrete and mixture technology, which is applied in the field of self-compacting concrete and its preparation, can solve problems such as poor compacting effect, and achieve the effects of good gap passage, good segregation resistance, and shrinkage relief

Inactive Publication Date: 2021-02-09
北京城建银龙混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first object of the present invention is to provide a self-compacting concrete, which solves the problem of poor compacting effect and can achieve self-compacting effect without vibration

Method used

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  • A kind of self-compacting concrete and preparation method thereof
  • A kind of self-compacting concrete and preparation method thereof
  • A kind of self-compacting concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0018] Embodiment 1-3: a kind of self-compacting concrete, it is prepared by following method:

[0019] (1) mixing polycarboxylate high-performance water reducer with a small amount of water to obtain a mixture of polycarboxylate high-performance water reducer and water;

[0020] (2) Add water to cement, fly ash, and mineral powder to mix, then add acetonitrile and PAA aqueous solution, mix well, add medium sand with a fineness modulus of 3.0-2.3 and stone with a particle size of 15-20mm, mix ; Then add the mixture of polycarboxylate high-performance water reducer and water that step (1) obtains, mix homogeneously;

[0021] In step (2), in terms of parts by mass, the consumption ratio of cement and acetonitrile is 100: 2; in adding the mixture of sand, stone, polycarboxylate high-performance water reducer and water and the subsequent mixing process, acetonitrile gradually Volatile.

[0022] The formula of embodiment 1-3 is as shown in table 1.

[0023] The formula of table ...

Embodiment 4

[0025] Embodiment 4: A kind of self-compacting concrete, the difference with embodiment 2 is that in step (2), after adding water in the crushed cement, fly ash, ore powder, no acetonitrile is added.

Embodiment 5

[0026] Embodiment 5: a kind of self-compacting concrete, the difference with embodiment 2 is, in step (2), after adding water in the cement after pulverizing, fly ash, slag, the acetonitrile amount that adds is cement's 5wt%.

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Abstract

The invention discloses self-compaction concrete and a preparation method of the concrete. The concrete comprises the following ingredients in parts by mass: 158-166 parts of water, 245-256 parts of cement, 108-113 parts of pulverized fuel ash, 48-52 parts of mineral powder, 780-821 parts of sand, 985-1035 parts of stone and 6.2-6.6 parts of high-performance polycarboxylic acid water reducer. Theconcrete can achieve a self-compaction effect without vibration.

Description

technical field [0001] The invention relates to a self-compacting concrete and a preparation method thereof. Background technique [0002] In order to reduce the problems of air bubbles and cavities in concrete, most of the concrete needs to be vibrated and compacted during grouting; does not work well. Therefore, it is of great value to develop a concrete that does not require vibration compaction. Contents of the invention [0003] The first object of the present invention is to provide a self-compacting concrete, which solves the problem of poor compacting effect and can achieve self-compacting effect without vibration. [0004] Above-mentioned technical purpose of the present invention is achieved through the following technical solutions: [0005] A self-compacting concrete, comprising the following components by mass fraction: 158-166 parts of water, 245-256 parts of cement, 108-113 parts of fly ash, 48-52 parts of mineral powder, 780-821 parts of sand, stone 985...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B111/70
CPCC04B28/00C04B2111/70C04B18/08C04B18/141C04B14/06C04B14/02C04B2103/302C04B24/125C04B24/2641
Inventor 常峰李杰张虎高建松齐峰
Owner 北京城建银龙混凝土有限公司
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