Energy-saving type concrete crack repairing agent

Abstract

The invention discloses an energy-saving type concrete crack repairing agent which comprises the following components in parts by weight: 12-18 parts of sand, 5-10 parts of a quartz powder, 20-35 parts of ordinary portland cement, 10-18 parts of sulphoaluminate cement, 6-12 parts of sodium silicate, 5-9 parts of a polyvinyl acetate emulsion powder, 3-7 parts of silica fume, 7-10 parts of a slag powder, 6-9 parts of fly ash, 8-10 parts of an expansive agent, 0.4-0.6 part of a polycarboxylic acid type high-efficiency water-reducing agent, and 0.2-0.4 part of polypropylene fiber. The concrete repairing agent has high bonding strength, and significantly improves the binding force between a new concrete interface and an old concrete interface; the concrete repairing agent is short in congealing curing time, fast in development of strength after congealing, and suitable for rapid repairing; the concrete repairing agent has the advantages of environmental protection, no toxicity, no smell, harmlessness to human bodies, single-component construction, and no pollution to the environment; and the concrete repairing agent can be used for repairing of concrete cracks, holes, honeycombs and pock marks, and drawing repairing of seams of face bricks and mosaic.

Description

technical field [0001] The invention relates to an energy-saving concrete crack repair agent. Background technique [0002] Concrete is a heterogeneous brittle material mixed with sand and gravel aggregates, cement, water and other external materials. Due to a series of problems such as concrete construction, its own deformation and constraints, concrete cracks have become the most common engineering diseases in civil engineering, water conservancy, bridges, tunnels and other projects. The light ones cause corrosion of internal steel bars and other materials, reducing the bearing capacity and durability of reinforced concrete materials, and the severe ones will threaten people's lives and property. Due to the differences in the composition of concrete materials, microstructure, design and construction, and external influences, there are many reasons for concrete cracks: 1. The large amount of heat of hydration produced during the hydration of large-volume concrete cannot b...

AI Technical Summary

Problems solved by technology

Concrete cracks are inevitable, but existing repair materials have disadvantages such as low bond strength with old concrete, long curing time, only suitable for repairing large areas of damage, large shrinkage deformation, high viscosity, and high brittleness. Difficult to meet the repair requirements of concrete structure cracks