Composite high-efficiency ultrafine-powder grouting material

Abstract

The invention relates to a composite high-efficiency ultrafine-powder grouting material. The material is prepared by fully and evenly stirring the following raw materials in parts by weight: 2500-2700 parts of superfine cement, 241-443 parts of ultrafine composite mineral powder, 18-24 parts of a polycarboxylate superplasticizer, 13-20 parts of inorganic silicon sub-nanometer bead powder, 14-24 parts of an ultrafine complex expansion agent, 0.5-3.5 parts of methyl silicate and 0-1 part of a high-efficiency thickening time control agent. The composite high-efficiency ultrafine-powder grouting material is reasonable in formula, low in production cost, good in working performance, easy in processing, is environment-friendly and free from pollution, thus being wide in application scope.

Description

technical field [0001] The invention relates to the technical field of crack and crack treatment, in particular to a composite high-efficiency ultrafine powder grouting material. Background technique [0002] As a grouting material, cement has the advantages of high strength, good durability, non-toxic, tasteless, wide and convenient source of materials, and low price. Generally, ordinary cement is used for grouting and grouting. However, ordinary cement has a large particle size and a large number of coarse particles. When the water-cement ratio is large, the stability of the slurry is poor. Poor impermeability and corrosion resistance lead to poor durability, which affects structural stability and service life. Ordinary cement can meet engineering requirements. Therefore, it is imperative to develop new high-efficiency and high-performance ultra-fine cement grouting materials. [0003] Since Japan successfully developed MC-500 ultra-fine cement in the early 1980s, due to...

AI Technical Summary

Problems solved by technology

However, at present, this type of material is mainly made of Portland series ultra-fine cement or modified materials made by adding high-efficiency water reducer, expansion agent, etc. to the ultra-fine cement and grinding together, which directly leads to disadvantages : First, if there are defects in the produced products, it is difficult to reverse the predicament in time, and it may even be impossible to correct the defects at all, and can only be scrapped

As we all know, the new high-performance ultra-fine cement-based grouting material is more expensive, which will inevitably cause certain economic losses.

Second, due to the wear resistance and heat resistance of each material (the temperature in the mill is generally greater than 200°C), the volatility in the hot flash environment, etc., the fineness of some materials with good grindability has reached the technical requirements early. , and the materials that are difficult to grind are still very coarse, far from meeting the technical requirements, and if there is a change in effectiveness due to poor heat resistance, etc., the quality and performance of the processed products will be greatly reduced