Self-repairing grouting material and preparation method thereof

Abstract

The invention provides a self-repairing grouting material and a preparation method thereof. The self-repairing grouting material is prepared by mixing grouting material powder with water, wherein thegrouting material powder is prepared from, by mass, 40%-50% of a cementing material, 5%-15% of micro aggregate, 40%-50% of fine aggregate, 0.01%-1% of an admixture and 1%-5% of a self-repairing agent.The preparation method comprises the steps that step 1, sulphoaluminate clinker is prepared; step 2, the raw materials are uniformly mixed separately as required; step 3, a chemical repair agent anda catalyst which cooperate with each other are selected; step 4, the raw material components are mixed uniformly according to the mass percentage to prepare the grouting material powder; step 5, the grouting material powder is mixed with the water to prepare the self-repairing grouting material. The self-repairing grouting material can repair cracks, the preparation steps ares simple, the operation is convenient, and the prepared self-repairing grouting material has high strength, high fluidity and durability.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a self-repairing grouting material and a preparation method thereof. Background technique [0002] The use of precast concrete elements in the construction industry is a new development trend. The current vertical connection methods of precast concrete components mainly include sleeve grouting connection, grout anchor connection and indirect connection, among which sleeve grouting connection is the main one. The stability of the sleeve grouting connection is mainly determined by the properties of the grouting material. The grouting materials currently on the market are mainly cement-based grouting materials, which have the characteristics of high compressive strength and the like. However, the external long-term force load of precast concrete components and the internal grouting material of precast concrete components are affected by their own microscopic characteristics and t...

AI Technical Summary

Problems solved by technology

However, the external long-term force load of precast concrete components and the internal grouting material of precast concrete components are affected by their own microscopic characteristics and the environment, which can easily cause cracks, damage or joints between grouting material and steel bars. If it is not repaired or not repaired in time, it will affect the durability and service life of the prefabricated building structure, and even seriously affect the stability of the entire prefabricated building structure.

[0003] In summary, there is an urgent need for a self-repairing grout and its preparation method to solve the problem of cracks, damage or detachment of the joint between the grout and the steel bar in the prior art, thereby improving the sleeve Durability, service life and stability of prefabricated building structures between grouting materials and steel bars

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