Single-component high-performance mortar for repairing and reinforcing concrete

Abstract

The invention provides single-component t high-performance mortar for repairing and reinforcing concrete, which comprises the following components in part by mass: 200g of sand, 55 to 75 parts of ordinary portland cement, 10 to 30 parts of sulphate aluminium cement, 3 to 7 parts of siliceous dust, 8 to 12 parts of flyash, 0.18 to 0.22 part of water reducing agent, 2 to 4 parts of flexibilizer, 0.04 to 0.06 part of water-retaining agent, 1.0 to 2.0 parts of swelling agent and 0.1 to 0.2 part of polymer synthetic fiber. The single-component t high-performance mortar has the advantages of high initial strength, good adhesion, excellent cracking resistance, low ratio of compressive strength to flexural strength, excellent toughness, simple and convenient construction, single component, no toxin or smell, no harm to human bodies, and environmental protection without pollution.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a single-component high-performance mortar that can be used for concrete repair and reinforcement. Background technique [0002] All kinds of infrastructure in national production and life, such as industrial buildings, ports, bridges, etc., mostly use concrete materials. Due to the influence of factors such as the use environment, natural disasters or construction quality, concrete materials will have problems of varying degrees, ranging from honeycomb damage and affecting the appearance; to severe cases, insufficient bearing capacity and potential safety hazards. Effective repair and reinforcement of it is of great significance great significance. [0003] Cement-based materials and organic materials can be used for repair and reinforcement of concrete. Due to the good compatibility between cement-based materials and concrete foundations and high cost performance, ...

AI Technical Summary

Problems solved by technology

Due to the good compatibility between cement-based materials and concrete foundations and high cost performance, they are more widely used, but there are still some shortcomings, such as low early strength, resulting in long construction period; poor bonding performance, After construction, the bonding between the repair material and the concrete foundation interface is weak, and peeling damage is prone to occur; the crack resistance is poor, and the shrinkage after construction cannot be effectively controlled, and cracking is prone to occur, resulting in repair failure; low flexural strength and insufficient toughness; two-component construction, Emulsion-modified cement-based repair materials require two-component construction, and the construction quality is often difficult to control