A multifunctional composite grouting material

Abstract

The invention relates to a multifunctional compound grouting material. The grouting material is prepared from, by weight, 2640-2760 parts of superfine cement, 50-80 parts of modified nanoscale calcium powder, 17-25 part of polycarboxylate superplasticizer, 60-120 parts of superfine steel slag fine powder, 75-120 parts of superfine high-calcium fly ash, 10-20 parts of superfine fluorine gypsum powder, 0.1-0.3 part of secondary nanoscale polymer and 1-3 parts of aluminum magnesium silicate, and the raw materials are evenly stirred to obtain the material. The multifunctional compound grouting material is reasonable in composition, low in production cost, good in working performance, easy to process, environmentally friendly, energy-saving, pollution-free, and wide in application range.

Description

technical field [0001] The invention relates to the technical field of crack and fissure treatment, in particular to a multifunctional composite grouting material. Background technique [0002] As a grouting material, cement has the advantages of high strength, good durability, non-toxic, tasteless, wide and convenient material sources, 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, and the water is easy to separate and thicken. It cannot be effectively poured into fine cracks (0.1mm), especially for extremely fine cracks (0.02mm ) of the grouting. In addition, slow strength development, poor impermeability and corrosion resistance lead to poor durability, affecting structural stability and service life. Therefore, ordinary cement is difficult to meet engineering requirements. [...

AI Technical Summary

Problems solved by technology

But 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 and other modifiers to the ultra-fine cement and grinding together, which directly leads to Disadvantages: First, if there are defects or deficiencies in the produced products, it is not easy to reverse the situation 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