Rustproof repairing method for reinforced concrete structure

A technology of reinforced concrete and repair mortar, which is used in building maintenance, bridge maintenance, building construction, etc., can solve the problems of aging failure, reduced component toughness, easy to appear brittle fracture, etc., to improve the ability to work together, high interface viscosity. The effect of the knot strength and the guarantee of the bonding ability

Active Publication Date: 2013-04-03
CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP XIAMEN HONGYE
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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 capaci

Method used

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  • Rustproof repairing method for reinforced concrete structure
  • Rustproof repairing method for reinforced concrete structure
  • Rustproof repairing method for reinforced concrete structure

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Embodiment Construction

[0027] 1. The composition materials and properties of the polymer repair mortar in this embodiment are shown in Table 2, and the amount of water added when stirring the mortar is 14% of the mass of the repair mortar.

[0028] Table 2 Composition and performance of polymer repair mortar

[0029]

[0030] 2. There are three types of crack width repair methods for components:

[0031] 2.1 The crack width of member 1 is less than 0.5mm:

[0032] Chisel away the damaged concrete to expose the steel bar at one end. Clean the surface with high pressure water to remove debris, dust from the concrete surface. Use the interface agent emulsion, roll it on the surface of the component with a roller, brush the damaged part with a small brush, and carry out the next repairing construction after 2-4 hours of curing.

[0033] The surface is closed with 5mm thick polymer repair mortar. After the component damage and cracks are repaired, connect one end of the aluminum wire to the steel ...

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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 ...

Claims

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Application Information

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IPC IPC(8): C04B28/14E04G23/02E01D22/00
Inventor 李悦辜中伟王二强杜修力
Owner CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP XIAMEN HONGYE
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