Waterproof and anti-corrosion repair mortar for polymer cement-based concrete structure

Abstract

The invention relates to a waterproof and anti-corrosion repair mortar for a polymer cement-based concrete structure, in particular to a cement concrete repair material for a cement concrete structure, which is used for carrying out bonding reinforcement and repair on defects of municipal roads, municipal services, bridges and water conservancy projects (dams and gates). The waterproof and anti-corrosion repair mortar is prepared by mixed materials and water, and the mixed materials comprise the following components in parts by weight: 20-30 parts of portland cement, 0.01-0.05 part of high-performance water-reducing agent, 1-5 parts of high-aluminum cement, 15-30 parts of quartz sand, 25-60 parts of gravel and 1-3 parts of acrylic adhesive powder, 1-3 parts of fiber material, while the using amount of water accounts for 5-14% of the total parts of the mixed materials. Due to the adoption of the technical scheme, the waterproof and anti-corrosion repair mortar has the characteristics of good pressure resistance, high flexural strength, high bonding strength, good durability, convenient and fast construction, fast setting and early strength shrinkage control, and can greatly shorten the repair time and quickly resume the traffic in particular to roads.

Description

Technical field [0001] The present invention relates to a building material, and in particular to a cement concrete repair material used for bonding, reinforcing, and repairing defects in municipal roads, municipal administrations, bridges, and water conservancy projects (dams, gates). . Background technique [0002] With the increase of service life, under the combined action of vehicle load and external environment, road concrete structures such as bridges, culverts, curbs, etc. commonly suffer from surface concrete swelling, cracking, spalling, and internal steel bar corrosion, etc., especially In northern coastal areas, concrete structures are subject to the dual effects of salt damage and freeze-thaw cycles, causing more serious damage. These damages directly affect the appearance and normal use of concrete structures, and even affect the safety of concrete structures. At present, ordinary mortar is generally used as a repair material for damage to road concrete struct...

AI Technical Summary

Problems solved by technology

At present, for the damage of road concrete structures, ordinary mortar is generally used as a repair material. However, practice shows that the repair effect of ordinary mortar is often poor. The same damage occurs, and ordinary mortar cannot inhibit the development of the disease, resulting in the expansion of the disease range year by year

In addition to ordinary mortar, synthetic resin mortar also has certain applications. This kind of repair material has good durability and high bonding strength with old concrete, but this kind of material is completely different from ordinary concrete. The modulus of elasticity and coefficient of expansion are quite different. When this kind of material is used for repair, if the interface area is not specially treated, under the action of external force, a large stress will be generated in the interface area, which will cause damage.

In addition, the cost of synthetic resin repair materials is relatively high, which is unaffordable for general maintenance units, which restricts the promotion of this material

Existing concrete repair materials have problems such as poor repair effect and high cost