Rustproof repairing method for reinforced concrete structure

Abstract

The invention discloses a rustproof repairing method for a reinforced concrete structure, belonging to the technical field of building materials. The rustproof repairing method provided by the invention adopts a method for repairing a composite aluminum wire mesh by cement-based polymer repairing mortar to repair the reinforced concrete with cracks. The polymer repairing mortar comprises the following components in percentage by weight: 35% of high-alumina cement, 11% of talcum powder, 43% of quartz sand, 4% of anhydrous anhydrite powder, 2% of silane modified phenylpropyl glue powder, 1.3% of water reducing agent, 0.7% of shrinkage reducing agent and 3% of tin methane sulfonate. The rustproof repairing method provided by the invention can remarkably improve the mechanical properties of the reinforced concrete structure and also can remarkably improve the rustproof capacity and durability of the reinforced concrete structure. Moreover, the rustproof repairing method has a simple technical process and low material cost, and can be extensively applied to the reinforcing field of the concrete structures.

Description

Technical field: [0001] The invention relates to the field of reinforcement, repair and anticorrosion of reinforced concrete structures such as civil engineering, water conservancy, and bridges. Background technique: [0002] There are many reasons for cracks in reinforced concrete, which are very complicated and usually include the following types: 1) Defects and cracks are formed by improper selection of materials. Expired cement is used, the aggregate mud content is too high, alkali aggregate reaction occurs, cement stability is poor, and cement hydration is too high to cause cold shrinkage. 2) The construction violates the operation rules to form defects and cracks. The concrete is not vibrated densely, and honeycomb appears; the time of concrete mixing and transportation is too long, the water evaporates, causing irregular network cracks in the concrete; the formwork is removed too early, the concrete has not yet established sufficient strength, and the components are ...

AI Technical Summary

Problems solved by technology

2) The construction violates the operation rules to form defects and cracks

[0008] Although the above-mentioned repairing methods can restore the bearing capacity of reinforced concrete members well and even improve them, the existing problems are more prominent: 1) The toughness of members is generally reduced, and the beam is prone to brittle fracture under the limit state of bearing capacity

2) The above repair method does not protect the steel bars, and the steel bars are easily corroded by the erosive substances immersed

3) If the repair material is organic matter such as epoxy resin, it is prone to aging failure

4) The bonding ability of the interface between the repair material and the old concrete is poor, and the durability of the repair component cannot be well guaranteed

Images