Production method of cement-based grouting material

Abstract

The invention provides a production method of a cement-based grouting material. The method comprises the steps that aggregate and/or a binding material are mixed with a liquid additive, weight ratio of the aggregate and/or the binding material with the liquid additive in the mixture is (90-110) : (0.1-30); the obtained mixture is subjected to a drying process and can be mixed with polymer rubber powder which can re-disperse to obtain the cement-based grouting material. According to the production method, a liquid additive which is not easy to dehydrate and dry, which relates to polycarboxylate superplasticizer particularly, can be dried easily, the performance of the additive can be retained to the greatest extent, the aggregate or the binding material which is subjected to preprocessing of the liquid additive is mixed into other materials according to a specified proportion of the cement-based grouting material, and a cement-based grouting material product with good performance can be produced.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a production method of cement-based grouting material. Background technique [0002] Cement-based grouting material is a dry-mixed material composed of cement as the base material, adding natural high-strength aggregates and concrete admixtures in an appropriate amount. After mixing with water, it has the characteristics of high fluidity, early strength, high strength, and micro-expansion. It is widely used. Used for secondary grouting of equipment foundations, grouting of steel structure column foundations, bonding grouting of small gaps such as track foundations, embedding of construction joints by reverse drilling in subways, tunnels, and underground projects, anchoring of anchor bolts, rapid filling of cable trenches, concrete beams, Reinforcement and repair grouting of columns, slabs and walls, other irregular dead corners, corners and concrete voids that are di...

AI Technical Summary

Problems solved by technology

This production process consumes a lot of energy and costs, and the performance of polycarboxylate superplasticizers will generally decrease by about 10-20% after high-temperature treatment

Due to the high temperature, the powdered polycarboxylate superplasticizer is easy to stick. If the quality of the liquid product fluctuates or the drying process is not properly controlled, tower burning accidents will easily occur

[0004] The technology of polycarboxylate superplasticizer is still being improved and improved, but due to the difficulty in processing powdered polycarboxylate superplasticizer, high energy consumption and high cost, it is difficult to apply it in cement-based grouting materials

If this problem cannot be solved, many types of high-performance water reducing agent technologies developed later will be useless in cement-based grouting materials.