Crack-resistant repair material with high resistance to erosion and abrasion

Abstract

The invention provides a crack-resistant repair material with high resistance to erosion and abrasion. The crack-resistant repair material with the high resistance to erosion and abrasion is mainly produced by mixing the raw materials of 28.0-38.0% of silicate cement, 5.0-7.5% of ultra-fine powder, 52.0-61.0% of iron ore, 0.5-1.5% of polymer rubber powder, 0.04-0.1% of water-absorbent resin, 0.8-1.6% of a volume stabilizer, 0.1-0.3% of a polycarboxylate-type water reducer, 0.01-0.03% of a defoaming agent and the like. The repair material has the advantages that the price is low, construction is convenient, the erosion and abrasion-resisting strength is high, the bonding strength is high, shrinkage is low, the crack resistance is high, a coefficient of linear expansion is similar to that ofconcrete, the crack-resistant repair material with the high resistance to erosion and abrasion does not fall off a matrix material, and the like; and organic materials of epoxy resin mortar and the like can be replaced.

Description

technical field [0001] The invention relates to a cement-based repair material, in particular to a crack-resistant high-impact and wear-resistant repair material suitable for repairing parts requiring high durability such as water scoured surfaces. Background technique [0002] The scouring wear and cavitation effect of high-speed sandy water on the flow surface of hydraulic concrete buildings will lead to large-scale erosion of surface concrete, and serious catastrophic accidents, so it has always been paid attention to. my country has started research on the application of anti-abrasion materials since the 1960s. The main idea is to improve the anti-abrasion performance of the concrete on the flow surface by increasing the compressive strength, and at the same time strengthen the protection of the concrete on the flow surface and timely correct the thin Layer abrasion damage is repaired. With the development and progress of material science, the compressive strength of ant...

AI Technical Summary

Problems solved by technology

Spraying polyurea elastomer has excellent comprehensive mechanical properties, but it requires high operating technology, high product price, and high repair cost

In addition, the application practice shows that the general linear expansion coefficient of resin mortar is larger than that of ordinary cement concrete. When it is applied in an environment with large temperature difference changes, the repair layer is easy to crack, and it will fall off from the base concrete and be destroyed.

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