Super-early-strength micro-expansion grouting material with controllable setting time and preparation method and application thereof

Abstract

The invention provides a super-early-strength micro-expansion grouting material with controllable setting time and a preparation method and application thereof, and belongs to the technical field of grouting material reinforcement. Ordinary portland cement clinker and sulphate aluminium cement clinker are used as main gelling raw materials, and a filling compaction component, a setting adjusting component, a water retention thickening component, a water reducing component and an early expansion component are blended to prepare the grouting material with controllable setting time, early strength, easy diffusion, micro expansion, low cost, energy saving and environmental protection. The preparation method and the field process are simple to implement, the initial setting time is controlled at about 1h, the final setting time is fast, the early strength effect is good, the operation process is met, the material can be set as soon as possible, and the material is suitable for supporting underground soft rock. At the same time, the material can be used for grouting, and can also be used for grouting of anchor rods / cable holes, small conduits, anchor pipes, pipe sheds and the like, so that the material has good practical application value.

Description

technical field [0001] The invention belongs to the technical field of grouting material reinforcement, and in particular relates to a super-early-strength micro-expansion grouting material with controllable setting time and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The grouting material is the main substance that fills and consolidates the fractures and pores in the formation, and it is the key to achieve water blocking or reinforcement. There are many types of grouting materials, commonly used chemical grouting materials and cement grouting materials. The chemical grouting material has low viscosity, the setting time ...

AI Technical Summary

Problems solved by technology

However, just after the excavation of the face of the surrounding rock, the surrounding rock still has a certain self-stabilization ability, and before the instability produces obvious cracks, there is a certain difficulty in grouting. It is difficult to inject the grout. The deformation of the surrounding rocks is carried out only after certain cracks are formed, and the current grouting materials and techniques are used, and the grouting strength is very low in a short period of time (1 day), and the actual measurement is only 3-4 MPa, which is not ideal for effectively controlling the deformation of the surrounding rocks

Images