Pumping concrete admixture capable of improving pumpability and preparation method thereof

A technology for pumping concrete and pumping performance, which is applied in the field of pumping concrete admixtures and its preparation, can solve problems such as difficulty in application, expensive silica fume, and lack of high-quality fly ash, and achieve low product cost and improved workability , the effect of improving pumpability

Inactive Publication Date: 2019-07-12
ANHUI TONGGUAN (LUJIANG) MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-quality fly ash and slag resources are becoming more and more scarce, and silica fume is expensive, and it is difficult to use it in low- and medium-strength concrete such as C30 and C40. The market urgently needs low-cost concrete that can effectively improve the pumpability of concrete. performance admixture

Method used

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  • Pumping concrete admixture capable of improving pumpability and preparation method thereof
  • Pumping concrete admixture capable of improving pumpability and preparation method thereof
  • Pumping concrete admixture capable of improving pumpability and preparation method thereof

Examples

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Embodiment 1

[0031] Preparation of pumpable concrete admixtures for improved pumpability

[0032] The raw material composition of this embodiment is: by weight, copper tailing slag 75, granulated blast furnace slag 25, admixture 0.1, admixture is plasticized by the mass ratio of 1:1:2 triethanolamine, polyvinyl alcohol and polycarboxylic acid agent composition. The specific preparation method is as follows:

[0033] (1) separating the muddy copper tailings through a hydrocyclone to separate particles with a particle size of less than 200 meshes, then settling and concentrating, and then dehydrating through a filter press to obtain a copper tailing mud cake with a moisture content of 10%;

[0034] (2) Mix the cake-like material of copper tailing slag with granulated blast furnace slag, then dry and grind in a vertical mill or drying mill until the specific surface area is greater than 550m 2 / kg, and during the grinding process, the admixture is sprayed to obtain the pumpable concrete adm...

Embodiment 2

[0036] Preparation of pumpable concrete admixtures for improved pumpability

[0037] The raw material composition of this embodiment is: by weight, copper tailings 70, granulated blast furnace slag 30, admixture 0.05, admixture is plasticized by the mass ratio of 1:1:2 triethanolamine, polyvinyl alcohol and polycarboxylic acid agent composition. The specific preparation method is as follows:

[0038] (1) separating the muddy copper tailings through a hydrocyclone to separate particles with a particle size less than 200 meshes, then settling and concentrating, and then dehydrating through a filter press to obtain a copper tailing mud cake with a moisture content of 9%;

[0039] (2) Mix the cake-like material of copper tailing slag with granulated blast furnace slag, then dry and grind in a vertical mill or drying mill until the specific surface area is greater than 550m 2 / kg, and during the grinding process, the admixture is sprayed to obtain the pumpable concrete admixture th...

Embodiment 3

[0041] Preparation of pumpable concrete admixtures for improved pumpability

[0042] The raw material composition of this embodiment is: by weight, copper tailings 80, granulated blast furnace slag 20, admixture 0.1, admixture is plasticized by the mass ratio of 1:1:2 triethanolamine, polyvinyl alcohol and polycarboxylic acid agent composition. The specific preparation method is as follows:

[0043] (1) separating the muddy copper tailings through a hydrocyclone to separate particles with a particle size of less than 200 meshes, then settling and concentrating, and then dehydrating through a filter press to obtain a copper tailing mud cake with a moisture content of 8%;

[0044] (2) Mix the cake-like material of copper tailing slag with granulated blast furnace slag, then dry and grind in a vertical mill or drying mill until the specific surface area is greater than 550m 2 / kg, and during the grinding process, the admixture is sprayed to obtain the pumpable concrete admixtur...

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Abstract

The invention discloses a pumping concrete admixture capable of improving pumpability and a preparation method thereof. The admixture comprises the following raw materials (by weight): 70-80 parts ofcopper tailings, 20-30 parts of granulated blast-furnace slag, and 0-0.1 part of an additive. The additive is composed of triethanolamine, polyvinyl alcohol and a polycarboxylic plasticizer. The copper tailings from wet mill concentration contain lots of fine particles of less than 5 um. Through processes such as surface modification, drying, grinding, etc., the concrete admixture capable of effectively reducing bleeding and segregation of pumping concrete and remarkably enhancing pumpability can be prepared. Solid wastes can be largely utilized, the cost of the product is low, and the economic value is high. Thereby, the preparation method accords with the national circular economy and sustainable development policy.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a pumping concrete admixture capable of improving pumping performance and a preparation method thereof. Background technique [0002] Pumping concrete is a kind of ready-mixed concrete poured by concrete pump. Pumping concrete can not only improve the construction performance and quality of concrete, but also improve working conditions, increase the speed of concrete pouring and reduce engineering costs. At present, pumped concrete has become the most widely used variety in ready-mixed concrete. [0003] However, with the continuous expansion of the concrete industry and the shortage of high-quality raw materials and other factors, in actual projects, pumping concrete often has problems such as bleeding and segregation caused by pipe plugging, resulting in large economic losses. In C30, C40, etc. It is especially common in low-strength grades of concrete. To solve the pumping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/14C04B20/02C04B20/04
CPCC04B18/141C04B20/023C04B20/026C04B20/04C04B40/0039C04B24/122C04B24/2623C04B24/24Y02W30/91
Inventor 张代林黄赟蒋海托胡洪文方志甫陈佳阚忠辉李沛源贾帅王周和
Owner ANHUI TONGGUAN (LUJIANG) MINING CO LTD
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