Injecting paste material for underground structure water plugging and preparation method thereof

Abstract

The invention provides an injecting paste material for underground structure water plugging and a preparation method thereof and belongs to the field of material science. The injecting paste material comprises the following raw materials in parts by weight: 200-600 parts of Portland cement, 600-900 parts of ultra-fine slag powder, 550-650 parts of water, 10-30 parts of sodium silicate, 5-10 parts of high efficiency slushing agent and 0.5-2 parts of cellulose ether. The water glass (sodium silicate) and Portland cement serve as an activator of the ultra-fine slag powder, the water amount of the injecting paste material is reduced by using the high efficiency slushing agent, the cellulose ether serves as a water-retaining agent, a thixotropic agent and a thickening agent of the injecting paste material, the superfine cement is replaced by employing the Portland cement and the ultra-fine slag powder, various materials can be mixed and stirred on site, the Portland cement, the ultra-fine slag powder and the cellulose ether are uniformly mixed and packaged in advance and are transported to the site and are uniformly mixed and stirred with water, water glass and high efficiency slushing agent, various requirements of the injecting paste are met, and the amount of the ultra-fine cement is reduced.

Description

technical field [0001] The invention relates to a grouting material, in particular to a grouting material for water blocking of underground structures, and belongs to the field of material science. Background technique [0002] During the construction of tunnels, subways, mine roadways, etc., water leakage is often encountered in surrounding rock or concrete support, and lining. In order to reduce the flow of water during the construction process, grouting technology is often used to block water. After grouting, the surrounding rock cracks or concrete cracks are filled with grout, thereby reducing the water seepage rate and playing the role of grouting water blocking. For water plugging grouting, the grouting material is required to have a certain gel time controllability, otherwise it is easy to cause the loss of grout, and it is difficult to achieve the purpose of grouting water plugging. Grouting materials should meet the requirements of injectability, controllability, s...

AI Technical Summary

Problems solved by technology

Ordinary cement-sodium silicate double-fluid grout has adjustable gel time, high calculus rate of grouting body, and has certain strength. It is more suitable for grouting with high water pressure, fast water flow rate and large karst fissures. However, the on-site operation time is not easy to control, and pipe blockage is prone to occur

Ultra-fine cement will be one of the most widely used grouting materials at present. It has the characteristics of high strength, good durability, non-toxic and harmless, wide source of materials, high stone formation rate, high consolidation strength, and the injectable width is less than 0.2mm. The surrounding rock cracks and concrete support cracks, but the setting time is long, it is easy to be diluted by low water, the strength rises slowly, which is not conducive to immediate excavation after grouting, and the unit price of materials is high