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Preparation method of steel fiber self-compacting premixed concrete

A ready-mixed concrete and self-compacting technology, which is applied in the field of building materials, can solve problems such as easy cracking, self-heavy weight, and low tensile strength, and achieve the effects of improving bonding, improving compressive strength, and increasing compressive strength

Active Publication Date: 2020-04-24
深圳市恒星建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, concrete including self-compacting concrete is not only cheap, easy to obtain materials, and excellent in compressive strength, but also has the problems of heavy weight, low tensile strength, and easy cracking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) The cement of 140 parts by weight, the fly ash of 90 parts by weight, the long steel fiber (length 55-60mm, diameter 0.40-0.50mm) of 4.8 parts by weight, the basalt fiber dry mix of 22 parts by weight, and Stirring at a stirring speed of 3.4m / s for 50 seconds while adding 7.0 parts by weight of water reducer and 55 parts by weight of water thereto;

[0042] (2) the cement of 110 parts by weight, the slag powder of 150 parts by weight, the coarse aggregate of 670 parts by weight, the fine aggregate of 390 parts by weight, the short steel fiber of 4.0 parts by weight (length 18-20mm, diameter 1.20-1.30 mm) Dry mixing is uniform, and when adding 2.5 parts by weight of water reducer and 75 parts by weight of water, stir for 100 seconds at a stirring speed of 2.8m / s;

[0043] (3) Add the product of step (2) to the product of step (1) while stirring for 180 seconds at a stirring speed of 1.5m / s, thus preparing the steel fiber self-compacting ready-mixed product according ...

Embodiment 2

[0045] (1) the cement of 140 parts by weight, the fly ash of 90 parts by weight, the long steel fiber (length 55-60mm, diameter 0.40-0.50mm) of 4.6 parts by weight, the basalt fiber dry mix of 25 parts by weight, and Stirring at a stirring speed of 3.2m / s for 60 seconds while adding 8.0 parts by weight of water reducer and 50 parts by weight of water thereto;

[0046] (2) the cement of 110 parts by weight, the slag powder of 150 parts by weight, the coarse aggregate of 670 parts by weight, the fine aggregate of 390 parts by weight, the short steel fiber (length 18-20mm, diameter 1.20-1.30 mm) Dry mixing is uniform, and when adding 2.0 parts by weight of water reducer and 80 parts by weight of water, stir for 90 seconds at a stirring speed of 2.9m / s;

[0047] (3) Add the product of step (2) to the product of step (1) while stirring for 200 seconds at a stirring speed of 1.3m / s, thus preparing the steel fiber self-compacting ready-mixed product according to the present invention ...

Embodiment 3

[0049] (1) the cement of 140 parts by weight, the fly ash of 90 parts by weight, the long steel fiber (length 55-60mm, diameter 0.40-0.50mm) of 5.0 parts by weight, the basalt fiber dry mix of 20 parts by weight, and Stirring at a stirring speed of 3.5m / s for 45 seconds while adding 6.0 parts by weight of water reducer and 60 parts by weight of water thereto;

[0050] (2) the cement of 110 parts by weight, the slag powder of 150 parts by weight, the coarse aggregate of 670 parts by weight, the fine aggregate of 390 parts by weight, the short steel fiber (length 18-20mm, diameter 1.20-1.30 mm) Dry mixing is uniform, and when adding 3.0 parts by weight of water reducer and 70 parts by weight of water, stir for 110 seconds at a stirring speed of 2.6m / s;

[0051] (3) Add the product of step (2) to the product of step (1) while stirring for 150 seconds at a stirring speed of 1.6m / s, thus preparing the steel fiber self-compacting ready-mixed product according to the present inventio...

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Abstract

The invention discloses a preparation method of steel fiber self-compacting premixed concrete, wherein the method adopts a specific feeding sequence and mixing conditions as well as specific types ofsteel fibers and component proportions, so that the properties such as compressive strength, tensile strength and the like of the formed concrete can be further improved, and the crack resistance anddurability are improved. In addition, the invention also discloses the steel fiber self-compacting premixed concrete prepared by the preparation method.

Description

technical field [0001] The invention relates to the field of building materials, more specifically, to a method for preparing steel fiber self-compacting ready-mixed concrete and the concrete prepared therefrom. Background technique [0002] Recently, with the rapid development of modern civil engineering technology, there are more and more demands for large-volume, super-high-rise, long-span building structures, which put forward higher requirements for building material performance and construction technology. Among them, concrete is an extremely important engineering material in construction engineering, and self-compacting concrete, as a branch of high-performance concrete, has high fluidity, self-leveling without vibration, small slump loss over time, no segregation, Advantages such as non-bleeding occupy an increasing proportion in the application of concrete. In addition, self-compacting concrete also has the advantages of low cement consumption, high waste slag util...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B14/48C04B14/46C04B2103/302C04B18/141C04B18/12C04B14/06
Inventor 俞裕星俞建松许广森邹承忠
Owner 深圳市恒星建材有限公司
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