Concrete repair material, concrete repair coating and preparation method thereof

Abstract

The invention relates to the technical field of concrete, in particular to a concrete repair material, a concrete repair coating and a preparation method thereof. The concrete repairing material comprises the following raw materials in parts by weight: 80-120 parts of cement, 10-30 parts of fine sand, 40-60 parts of limestone, 10-30 parts of a hydrophobic material, 30-50 parts of dispersed latex powder, 20-40 parts of an expanding agent, 10-20 parts of a defoaming agent and 6-9 parts of an early strength agent. The concrete repairing material disclosed by the invention has the advantages of short setting time, high early strength, water resistance, aging resistance and relatively long service lifetime.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a concrete repair material, a concrete repair coating and a preparation method thereof. Background technique [0002] Cement pavement treatment not only has good construction performance and excellent durability, but also has solid pavement structure, strong diffusion load capacity, large friction resistance, good anti-skid performance, good wear resistance, good temperature and water stability, and long service life However, the cement concrete pavement also has some fatal defects, such as certain defects in the use conditions, environmental conditions, roadbed construction quality and materials, etc., it is easy to cause different degrees of local damage, such as Cracks, broken plates, local depressions or dislocations, cracks and loosening, local breakage into small pieces, peeling and peeling, local loosening to form potholes, slag drop or exposed pitted surface,...

AI Technical Summary

Problems solved by technology

[0002] Cement pavement treatment not only has good construction performance and excellent durability, but also has solid pavement structure, strong diffusion load capacity, large friction resistance, good anti-skid performance, good wear resistance, good temperature and water stability, and long service life However, the cement concrete pavement also has some fatal defects, such as certain defects in the use conditions, environmental conditions, roadbed construction quality and materials, etc., it is easy to cause different degrees of local damage, such as Cracks, broken plates, local depressions or dislocations, cracks and loosening, local breakage into small pieces, peeling and peeling, local loosening to form potholes, slag drop or exposed pitted surface, etc. Once the damage occurs, it will be damaged if it is not repaired in time. It will develop rapidly and spread to the surrounding area, thus forming a larger area of ​​damage. When these local damages reach a more serious level, it will not only affect the driving comfort on the road surface, but also damage the vehicle and even cause traffic accidents. Local damage may lead to more serious consequences. For this reason, the study of cement concrete rapid repair materials and methods is of great significance for the development and use of cement concrete pavement

[0003] For example, a concrete repair material and its preparation method proposed in Chinese patent CN109516747B, the material for concrete crack repair provided by this patent, at first utilizes cement, quartz sand, and river sand as base materials, for use after the repair material is solidified Provide sufficient strength; the epoxy-polyurethane composite material used not only has a certain degree of fluidity, but also maintains good elasticity, which can maintain a certain degree of fluidity in the initial stage of the repair material, make the material permeate and fill evenly, and improve curing After the strength; in the added epoxy-polyurethane composite material, fluorinated modified acrylic acid is used to modify the epoxy resin, which improves the durability of the repair material under ultraviolet conditions; the exothermic material and thermal change The materials cooperate with each other. Since the exothermic material will release heat when it meets water, and the thermally variable monomer N-isopropylacrylamide is used in the thermally variable material, the material will shrink after being heated. Therefore, after the initial crack is added , the heat-changing material will leave enough space to allow other polymer materials and base materials to flow into the gap after being heated and shrink, so that more base materials and polymers can be accommodated in the gap, and when the heat is dissipated, the heat-changing material The material will expand, so that the base material and polymer can fully fill the cracks and achieve high repair strength, but it still does not have the advantage of aging resistance, and it is difficult to withstand long-term vehicle rolling and thermal expansion and contraction of asphalt itself pressure, it will soon rupture again, reducing the service life of the repair material