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High-performance concrete admixture and preparation method thereof

A high-performance concrete and admixture technology, which is applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of complex preparation method and poor effect of improving concrete performance, and achieves simple preparation process, The effect of large surface energy and good dispersion performance

Inactive Publication Date: 2021-04-09
陈华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods of existing concrete admixtures are complicated, and the effect of improving concrete performance is relatively poor.
[0003] Through the above analysis, the existing problems and defects of the prior art are: the preparation method of the existing concrete admixture is complicated, and the effect of improving the performance of concrete is relatively poor

Method used

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  • High-performance concrete admixture and preparation method thereof
  • High-performance concrete admixture and preparation method thereof
  • High-performance concrete admixture and preparation method thereof

Examples

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preparation example Construction

[0042] like figure 1 Shown, the preparation method of the high-performance concrete admixture that the embodiment of the present invention provides comprises the following steps:

[0043] S101, processing the limestone to obtain limestone powder: placing the limestone in a pulverizer for crushing to obtain limestone blocks of uniform size; placing the limestone block in a calciner and calcining the limestone block at high temperature, and taking out the calcined product after the calcining; placing the calcined product in a pulverizer, pulverizing the calcined product, sieving the pulverized calcined product, and grinding the undersieve to obtain limestone powder;

[0044] S102, perform high-temperature calcination treatment of kaolin: put kaolin in a calcination furnace, set the calcination temperature to 600-700° C., and calcination time to 2-3 hours, and calcine the kaolin to obtain calcined kaolin; place the calcined kaolin in a grinder , set the grinding particle size to 0...

Embodiment 1

[0077] Put 6 parts of blast furnace water-quenched slag in a pulverizer for crushing, put the crushed material in a grinding device for grinding, sieve the ground material, collect the under-sieve, and obtain blast furnace water-quenched slag powder; put 4 parts of desulfurization gypsum liquid in In the mixer, add 9 parts of limestone powder into the mixer, stir evenly, add 5 parts of kaolin powder and modified carbon powder modified by 1 part of carbon powder, 2 parts of alumina and 1 part of nano-silica, stirring Add 2 parts of synergist to obtain the mixture, that is, the high-performance concrete admixture.

Embodiment 2

[0079] Put 8 parts of blast furnace water-quenched slag in a pulverizer for crushing, put the crushed material in a grinding device for grinding, sieve the ground material, collect the under-sieve, and obtain blast furnace water-quenched slag powder; put 4 parts of desulfurization gypsum liquid in In the mixer, add 12 parts of limestone powder into the mixer, stir evenly, add 6 parts of kaolin powder and modified carbon powder modified by 2 parts of carbon powder, 3 parts of alumina and 1 part of nano-silica, and stir Add 2 parts of synergist to obtain the mixture, that is, the high-performance concrete admixture.

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Abstract

The invention belongs to the technical field of concrete preparation, and discloses a high-performance concrete admixture and a preparation method thereof, the high-performance concrete admixture is composed of the following components by mass: 9-15 parts of limestone, 6-10 parts of blast furnace water-quenched slag, 5-6 parts of kaolin, 4-5 parts of desulfurized gypsum, 2-4 parts of alumina, 2-3 parts of a synergist, 1-3 parts of carbon powder, and 1-2 parts of nano silica. The carbon powder is physically treated by utilizing the characteristics of dispersity promotion, defoaming property, rheological property and the like of silicon dioxide, the excellent properties of dispersity promotion, enhancement, defoaming, rheology, sagging prevention and the like are shown in the material, the dispersity of all the components in concrete can be improved, and the viscosity and gas content of a mixture are reduced, so that the working performance and the post-hardening mechanical property of the concrete mixture are improved. The preparation process is simple, raw materials are easy to obtain, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of concrete preparation, and in particular relates to a high-performance concrete admixture and a preparation method thereof. Background technique [0002] At present: ultra-high performance concrete (UHPC) is a new type of material with ultra-high strength, toughness and durability. Ultra-high performance, so the preparation of UHPC has high requirements on raw materials. Commonly used admixtures include high-quality silica fume, mineral powder, fly ash, etc., but with the sharp increase in demand, the supply of the above high-quality materials is in short supply and the price continues to rise. If Several cheap materials can be used to prepare admixtures suitable for UHPC through close packing and activation design, which can not only alleviate the shortage of high-quality admixture resources, but also reduce the preparation cost of UHPC. In addition, due to the ultra-high glue content and ultra-low water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B24/02C04B20/04C04B20/02C04B14/06C04B14/28C04B18/14
CPCC04B40/0046C04B20/04C04B20/023Y02W30/91
Inventor 陈华商艳
Owner 陈华
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