Transient grouting material

Abstract

The invention discloses a transient grouting material. The transient grouting material consists of the following components in parts by mass: 800-1100 parts of a cementing material, 0.3-3 parts of a functional additive, 0.5-2 parts of a setting time adjusting additive, 0.1-1.5 parts of a thickening agent, and 0.5-1 part of a reinforcing agent. The transient grouting material provided by the invention uses sulphoaluminate cement as a cementing material, the sulphoaluminate cement is a fast hardening cement, and under this basic system, boric acid is a retarding material of the sulphoaluminate cement and lithium carbonate is an accelerating material, so that by reasonably selecting the composition of modified materials, the transient grouting material provided by the invention has certain scour resistance, reasonable setting time and setting time interval, and the setting time can be reasonably controlled according to actual application scene conditions to avoid construction difficultiescaused by a too short setting time when the transient grouting material is applied to underground grouting or other dynamic water grouting conditions.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a transient grouting material. Background technique [0002] With its superior performance, concrete has become the main force of modern building materials, and is widely used in modern industrial and civil buildings, seaport projects, roads, tunnels, and bridges and other engineering constructions. With the application of concrete in different environmental areas, such as saline-alkali environment, areas with huge temperature differences, coastal areas, etc., the durability, safety and service life of concrete structures are severely challenged. [0003] With the rapid development of infrastructure, sleeve grouting materials for steel bar connections are widely used in prefabricated structures in the construction industry. In the emergency repair of concrete engineering, the demand for it is also increasing, and the performance requirements of the material are also getting hig...

AI Technical Summary

Problems solved by technology

[0004] The existing grouting materials are mainly composed of cement, aggregate and additives. Its disadvantages are slow setting time, generally more than 5 hours, low early strength, which can reach 20MPa in 1 day, poor fluidity, low expansion degree, more than 50 It is difficult to achieve self-leveling at a distance of one centimeter

But its disadvantage is that the price of this high-grade special cement is high and uneconomical

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