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High-strength concrete with strong durability and good workability, and preparation method thereof

A high-strength concrete and water-reducing agent technology, applied in the field of concrete, can solve the problems of concrete workability (reduced workability, etc.)

Pending Publication Date: 2022-01-04
GUANGZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that adding steel slag to concrete as a substitute for sand can solve the problem of steel slag accumulation, but the ensuing concrete workability (workability) is significantly reduced, which is difficult to solve.

Method used

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  • High-strength concrete with strong durability and good workability, and preparation method thereof

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Embodiment 1

[0028] This embodiment provides a high-strength concrete, which is composed of the following raw material components in parts by weight: 153.09 parts of water, 727.16 parts of cement, 28.39 parts of silica fume, 506.85 parts of steel slag sand, 397.5 parts of natural river sand, 810 parts of granite gravel, 11.33 parts of polycarboxylate water reducer; water-binder ratio is 0.202.

[0029] Among them, the cement used is P.O42.5R ordinary Portland cement produced by Guangzhou Shijing Cement Company, with an apparent density of 3100kg / m 3 ; The silica fume used is 99-grade silica fume produced by Sichuan Langtian Resources Comprehensive Utilization Co., Ltd., with an apparent density of 2300kg / m 3 The steel slag sand used is the converter slag produced by Hunan Valin Xiangtan Iron and Steel Co., Ltd., which is crushed and sieved into steel slag sand with a particle size of 0.075-5mm and an apparent density of 3379kg / m 3 The polycarboxylate water reducer used is a polycarboxylat...

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Abstract

The invention belongs to the field of concrete, and discloses a high-strength concrete with a high durability and good workability, and a preparation method thereof. The high-strength concrete is prepared from, by weight, 140 to 160 parts of water, 650 to 730 parts of cement, 23 to 33 parts of silica fume, 480 to 510 parts of steel slag sand, 390 to 405 parts of natural river sand, 780 to 840 parts of granite macadam and 7.5 to 15.1 parts of a polycarboxylic acid type water reducing agent. According to the high-strength concrete, the steel slag sand is adopted to partially replace natural river sand, the situation of shortage of the natural river sand is relieved, and the high-strength concrete has the advantages of high strength, high fluidity, high segregation resistance, high gap passing ability and high durability.

Description

technical field [0001] The invention belongs to the field of concrete, in particular to a high-strength concrete with strong durability and good workability and a preparation method thereof. Background technique [0002] Durability is an important indicator of high-performance concrete, especially for concrete projects with a large amount of engineering, its opinions are more important. If the durability of concrete is insufficient, it will have extremely serious consequences, and even cause an extremely heavy burden on the future society. According to a survey in the United States, the total value of concrete infrastructure projects in the United States is about 6 trillion U.S. dollars, and the annual maintenance or reconstruction costs are about 300 billion U.S. dollars, which is a huge cost. However, the scale of my country's current infrastructure construction projects is huge. After about 30-50 years, these projects will also enter the maintenance period, and the requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/90
CPCC04B28/04C04B2201/52C04B2111/90C04B18/146C04B18/142C04B14/048C04B14/06C04B2103/302
Inventor 赖勉亨刘嘉骏何正铭王庆魏立华陆宝予温伟龙廖锦龙
Owner GUANGZHOU UNIVERSITY
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