Self-compaction concrete containing zeolite powder and preparation method thereof

A technology for self-compacting concrete and zeolite powder, which is applied in the field of concrete, can solve the problems of prone to loss of cohesion over time in compaction, difficult to guarantee the stability of work performance, strict requirements for self-compacting concrete, etc., and achieves good self-compacting performance. , Improve the surface quality, the overall effect is ideal

Inactive Publication Date: 2013-10-16
CHINA CONSTR THIRD ENG BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Self-compacting concrete has more stringent requirements on raw materials and mix ratio, and it is difficult to guarantee the stability of its working performance. In particular, self-compacting concrete is more prone to hardening, bleeding, low internal cohesion, and large loss over time. occurrence of phenomenon
According to our research, adding an appropriate amount of zeolite powder under the same mix ratio can effectively improve the working performance of concrete. Although there are reports on the application of zeolite powder in self-compacting concrete at home and abroad, the mixing ratio of zeolite powder is the same. There is little research on a core technology

Method used

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  • Self-compaction concrete containing zeolite powder and preparation method thereof
  • Self-compaction concrete containing zeolite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The self-compacting concrete in this embodiment is composed of the following components according to parts by weight: cement 372, fly ash 150, zeolite powder 8, river sand 800, crushed stone 850, water 172, polycarboxylate reducing Liquid 7.95.

[0028] Cement, fly ash, river sand, gravel, polycarboxylate water reducer, and zeolite powder are all purchased from the market.

[0029] The polycarboxylate water reducer was purchased from the PCA polycarboxylate water reducer produced by Shenzhen Maidi Concrete Admixture Co., Ltd. The water reducer is a light brown liquid with a density of 1.07g / ml and a solid content of 20 %, PH value 6-8, alkali content ≤ 0.2%, bleeding ratio ≤ 20%, water reducing rate up to 30%, has good compatibility with different varieties of cement and admixtures, and can significantly reduce concrete shrinkage , significantly improve the volume stability and durability of concrete. Zeolite powder is purchased from Ziyang Zhongyuan Nonmetal Products...

Embodiment 2

[0037] The self-compacting concrete in this embodiment is composed of the following components according to parts by weight: cement 370, fly ash 150, zeolite powder 10, river sand 800, crushed stone 850, water 172, polycarboxylate Liquid 7.95.

[0038] The raw materials used and the preparation steps are the same as those in Example 1, and the proportion data of each component of the prepared self-compacting concrete are shown in Table 1.

Embodiment 3

[0040] The self-compacting concrete in this embodiment is composed of the following components according to parts by weight: cement 362, fly ash 150, zeolite powder 18, river sand 800, crushed stone 850, water 172, polycarboxylate Liquid 7.95.

[0041] The raw materials used and the preparation steps are the same as those in Example 1, and the proportion data of each component of the prepared self-compacting concrete are shown in Table 1.

[0042] Table 1 distribution ratio data of each group (kg / m 3 )

[0043]

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Abstract

The invention discloses self-compaction concrete containing zeolite powder and a preparation method thereof. The self-compaction concrete comprises the following components according to parts by weight: 362-372 parts of cement, 150 parts of fly ash, 8-18 parts of zeolite powder, 800 parts of river sand, 850 parts of broken stone, 172 parts of water and 7.95 parts of polycarboxylic acid water reducer. The components are evenly stirred according to the requirement to obtain a product of the invention. By adopting the invention, the property of the concrete can be effectively improved, the fluidity and the cohesion property of a mixture are good, isolation does not occur, the bleeding rate is smaller, and the property of a filling template is greatly enhanced. The invention is especially suitable for the continuous pouring of concrete of large square quantity applied to a large structure with high steel bar density and abnormal curved faces and enables the concrete to carry out self filling and compaction in the template.

Description

technical field [0001] The invention relates to concrete, in particular to a self-compacting concrete containing zeolite powder and a preparation method thereof. Background technique [0002] In the process of concrete construction, under normal circumstances, the cast-in-place concrete is usually pumped, and the hand-held vibrating rod is used to vibrate and compact, or the attached vibrator is used to assist vibration to make it compact. However, in special structures, such as dense steel bars or complex and large components, some parts of the components cannot be mechanically vibrated, so the compactness of the concrete cannot be guaranteed. Therefore, it is necessary to use high-performance self-compacting concrete to realize the self-compacting of concrete without using vibrating equipment to meet the engineering quality and construction needs. [0003] Self-compacting concrete has more stringent requirements on raw materials and mix ratio, and it is difficult to guara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/08C04B14/06C04B14/02C04B24/26C04B103/30
CPCC04B2111/00103C04B28/02Y02W30/91C04B14/047C04B14/06C04B18/08C04B20/0076C04B24/2647C04B14/02C04B14/068C04B24/2641C04B40/0028C04B18/12C04B2103/302
Inventor 王辉高纯陈兵冯乃谦顾晴霞
Owner CHINA CONSTR THIRD ENG BUREAU GRP CO LTD
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