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Novel patching material

A repair material and a new type of technology, applied in the field of rapid repair materials and fiber polymer repair materials, can solve the problems of concrete damage, increase in concrete pavement, long cycle, etc., and achieve the effect of not easy to fall off, prevent cracks, and easy to implement

Inactive Publication Date: 2010-04-28
TONGJI UNIV
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, cracks in concrete pavements are often repaired by using cement-based repair materials to cover them. This method is not only a huge project, but also requires a long period of time, and it will increase the height of the repaired concrete pavement to varying degrees, which is not suitable for Multiple repairs; in addition, more importantly, the factors that cause concrete damage (such as sulfate attack, alkali aggregate reaction, etc.) will also cause damage to the cover concrete

Method used

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0023] The repair material of the present invention adds expansion agent and water reducer, which can effectively relieve the internal stress caused by the rapid hardening of cement, and effectively prevent cracks from recurring after the polymer cement is repaired. Secondly, fiber components are added, which can effectively reduce internal stress. Increasing the toughness and modulus of polymer cement further improves the crack resistance of concrete.

[0024] The early strength is mainly provided by 70-75% ash, which includes 96%-98% of rapid-hardening sulfoaluminate cement, 0.8%-1.5% of water reducing agent, and 0.8%-1.5% of expansion agent and 0.4%~1% coagulant, 22~25% polymer emulsion provides strong bonding performance and waterproof performance, plus 5~8% fiber, it plays a role of reinforcement and improves the concrete toughness, and f...

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Abstract

The invention relates to a novel patching material which comprises the following components in percentage by mass: 70-75% of ash, 20-22% of polymer emulsion and 5-8% of fiber, wherein the ash comprises quick-hardening sulphoaluminate cement, a water reducing agent, an expanding agent and a setting accelerator. The patching material prepared according to the proportion can be used for quick patching of concrete bridges, dams, roads and buildings, and has the advantages of close bonding with concrete, high strength, endurable water resistance and corrosion resistance. When in use, the patching material of the invention does not need to level the construction base level or make a protective layer, thereby saving time and labor and being a nontoxic no-pollution environment-friendly patching material.

Description

technical field [0001] The invention belongs to the technical field of building materials and polymer materials, and relates to a rapid repair material for concrete bridges, dams, roads, buildings, culverts and tunnels, in particular to a fiber polymer repair material. Background technique [0002] Concrete is a heterogeneous porous and brittle material with a large number of pores inside, low tensile strength and lack of toughness. Once the external tension exceeds its tensile capacity, cracks will occur. There are many reasons for concrete cracking, mainly including shrinkage, temperature stress, uneven foundation settlement, and alkali-aggregate reaction. Once cracks appear in the concrete, it will not only provide convenient conditions for the external erosive medium to enter the concrete, accelerate the damage process, affect its durability, but also affect its appearance. Especially for some newly-built concrete projects, some cracks are produced due to temperature s...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/72
Inventor 殷娟王光成王维陈明波
Owner TONGJI UNIV
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