Alkali-free liquid setting accelerator

Abstract

The invention discloses an alkali-free liquid setting accelerator which comprises the following components in percentage by mass: 48-58% of aluminum sulfate octadecahydrate, 3-5% of calcium fluoride, 1.5-3.5% of organic alkylol amine, 0.2-0.5% of cellulose, 0.2-0.5% of high-molecular polymer, 3-6% of soil mineral and the balance of water. The new materials and new formula are adopted to lower the rare material waste generated by resilience, enhance the durability and later strength of the concrete and eliminate the injuries of the environmental pollution and traditional setting accelerator to the human body. The alkali-free liquid setting accelerator is beneficial to improving the coal mine working environment and enhancing the occupational health level, and has important economic benefit, environmental benefit and social benefit for development of mining industry in China.

Description

technical field [0001] The invention relates to the technical field of materials in the mining engineering industry, in particular to an alkali-free liquid quick-setting agent for high-efficiency and environment-friendly wet sprayed concrete for mining. Background technique [0002] my country's coal mines have narrow working space and complex underground environment. For many years, relatively backward dry spraying or tidal spraying technology has been used, which has many problems, such as large rebound of dry spraying and high dust concentration at the spraying site. At the same time, the wet spraying concrete process has the advantages of high construction efficiency, low dust concentration, easy control of water-cement ratio, high concrete homogeneity, and low rebound rate. In the catalog of equipment and technology (the third batch), dry concrete sprayers have been clearly listed as eliminated products, which means the end of the fate of powder accelerators and the urg...

AI Technical Summary

Problems solved by technology

[0003] At present, the vast majority of accelerators used in domestic coal mines are strongly alkaline powder or liquid accelerators. These accelerators are strongly alkaline and often cause many problems when they are applied on site, mainly including alkali corrosion, strength The loss is relatively large, which affects the health of workers and the effect of support to a large extent