A kind of self-healing grouting material and preparation method thereof

Abstract

The invention provides a self-repairing grouting material and a preparation method thereof, which is prepared by mixing grouting material powder and water. The grouting material powder includes the following raw material components in mass percentage: 40% to 50% of gelling material, 5% ~15% micro-aggregate, 40%-50% fine aggregate, 0.01%-1% admixture and 1%-5% self-healing agent; the preparation method includes step 1, preparing sulfoaluminic acid Salt clinker; step 2, mixing each raw material evenly according to requirements; step 3, selecting a chemical repair agent and catalyst; step 4, mixing the raw material components evenly according to the mass percentage, and preparing grouting powder; step 5, Stir and mix the grouting material powder and water to make the self-repairing grouting material. The self-repairing grouting material of the invention can repair cracks, the preparation steps are simplified, 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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