Early-stage high-expansion cement-based grouting material

Abstract

The invention discloses an early-stage high-expansion cement-based grouting material. The grouting material comprises the following raw materials: 300-400 kg of cement, 30-40 kg of an admixture, 520-650 kg of manufactured sand, 0.2-0.4 kg of a water-retaining agent, 1.0-2.5 kg of a water reducing agent, 5-10 kg of an expansion agent, 1-2 kg of a defoaming agent, a small amount of a gas foaming agent, and 130-140 kg of stirring water. The early-stage high-expansion cement-based grouting material provided by the invention is finally obtained through proper cooperation and material selection matching, and the grouting material has unique expansion performance, higher expansion performance in the early stage of hydration and no shrinkage or micro-expansion performance in the late stage of thehydration, and can fully fill an internal space, improve an effective contact area and enhance application effects under cooperation of a high flow state of mortar.

Description

technical field [0001] The invention relates to a grouting material, in particular to an early high-expansion cement-based grouting material. Background technique [0002] With the reinforcement of various domestic projects and the increase of large-scale high-rise, super high-rise or underground construction projects, the quality requirements for cement-based grouting materials are higher. In the development of existing cement-based grouting materials, too much attention has been paid to early strength, high strength, and expansion properties, etc., and little attention has been paid to whether the material has effective contact with the surrounding structure during use. The small effective contact area of ​​the structure directly reduces the use effect of the material. After long-term research and serious research, the inventor believes that there is an urgent need for an early high-expansion cement-based grouting material that can increase the effective contact area with...

AI Technical Summary

Problems solved by technology

In the development of existing cement-based grouting materials, too much attention has been paid to early strength, high strength, and expansion properties, etc., and little attention has been paid to whether the material has effective contact with the surrounding structure during use. The small effective contact area of ​​the structure directly reduces the use effect of the material

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