Prestressing anchoring and grouting material additive, as well as preparation method and application thereof

Abstract

The invention discloses a prestressing anchoring and grouting material additive, as well as a preparation method and an application thereof. The prestressing anchoring and grouting material additive comprises expansion components, active blending materials, crack resisting components, water reducing components and regulating components in definite proportions. The preparation method comprises the following steps of: (A) adding the expansion components, the active blending materials, the crack resisting components, the water reducing components and the regulating components in weight percentage to a ball grinding mill; (B) grinding for 10-30 min to be uniform at normal temperature and pressure to make Brinell specific surface area not less than 350 m<2> / kg to obtain the product. The invention has simple acquirement of raw materials, feasible method, easy and convenient operation, reasonable formulation and convenient use, overcomes the performance defects of a common cement based grouting material and the problems existing during use in the traditional prestressing anchoring engineering. The invention can effectively improve the workability of the anchoring and grouting material, can effectively increase slurry fluidity, greatly reduce sopreina and avoid segregation and delamination on the basis of ensuring the strength of cement slurry, and can effectively compensate shrinkage under the plastic hardening state so as to increase the volume stability of the cement slurry.

Description

technical field [0001] The invention belongs to the technical field of building materials for geotechnical engineering, and in particular relates to a special admixture for prestressed anchoring grouting materials. At the same time, it also relates to a preparation method of a special admixture for prestressed anchoring grouting materials, and also relates to an application of the admixture in prestressed anchoring grouting materials. Background technique [0002] Prestressed anchorage technology is a new two-point prestressed structure developed on the basis of prestressed technology and the principle of wedge anchor. For the broken rock mass or faulted rock mass in the high slope, the purpose of stabilizing the slope is achieved by drilling holes in the rock mass and applying prestress to the anchor rods or anchor cables anchored in the holes. Now it is being popularized in the world for surface mine slope reinforcement, underground mining cavern support, railway tunnel s...

AI Technical Summary

Problems solved by technology

This kind of test consumes a lot of manpower, material resources and financial resources. What is more serious is that due to the lack of professional grouting teams, the quality of grouting is often unable to be controlled, causing serious hidden dangers to the project and huge losses to the state and people's property.