Abrasion-resisting mortar repairing material with high elasticity and construction technology

Abstract

The invention mainly employs monocomponent polyurea as a cementing material, a small amount of thixotropic agents are added properly, and mixed with special-type sand materials to prepare an abrasion-resisting mortar with high elasticity and high cost performance. Through improvement of the construction technology, the construction problems of slow curing speed, difficult levelling of surfaces and the like are overcome. A novel concrete thin-layer abrasion-resisting repairing material is prepared. The novel mortar is a flexible repairing material with good performances, has excellent elasticity besides, and has high intensity, high abrasion-resistance and aging resistance. The repairing material solves the encountered problems during concrete thin layer repairing well, and has unique advantage in concrete thin layer defect repairing aspects. The repairing material has better performances compared to traditional polymer cement mortar and epoxy mortar, can replace the traditional polymer cement mortar and epoxy mortar, and has good repairing effects especially in the repairing of shallow-layer destroy of hydraulic concrete abrasion-resisting positions. The repairing material has good low temperature performance and can maintain certain flexibility at the temperature of minus 45 DEG C.

Description

technical field [0001] The invention relates to concrete repairing technology, especially a high-elastic anti-scouring mortar repairing material and construction technology which are mainly used in water conservancy projects and have good elasticity, high strength and low-temperature flexibility. Background technique [0002] Polyurea has the advantages of high tensile strength, high elongation, good aging resistance, and firm bonding. This material is generally only used as a coating. After curing, it has a good sealing and anti-seepage effect. It can be used as a sealing coating and an anti-seepage coating. At present, it has been used in urban subways, high-speed railways, tunnel bridges, water conservancy, electromechanical, petrochemical, It is widely used in many engineering fields such as offshore drilling. Polyurea can be divided into two components and one component according to the components. [0003] Two-component polyurea, also known as polyurea elastomer, can...

AI Technical Summary

Problems solved by technology

[0008] However, in the actual damage repair, it is not easy to repair the thin layer, and many difficulties will be encountered.

The reason is that the environmental conditions during actual repair are complex and changeable, which are different from the ideal conditions of the laboratory

Difficulty 1, the bonding problem between the new repair layer and the old concrete layer; Difficulty 2, the void and peeling problems easily caused by different shrinkage coefficients between the new repair layer and the old concrete layer; Difficulty 3, the strength of the repair material itself, Crack resistance and weather resistance; Difficulty 4, the new repair layer is too thin, poor impact resistance under the action of moving materials, etc.