Silica powder modified superfine cement crack repair material and preparation method thereof

Abstract

The invention discloses a silica powder modified superfine cement crack repair material and a preparation method thereof. The silica powder modified superfine cement crack repair material is prepared from, superfine cement, water, silica powder, a water reducing agent and a swelling agent, wherein the mass of the water is 40%-60% that of the superfine cement, the mass of the silica powder is 5%-15% that of the superfine cement, the mass of the water reducing agent is 0.5%-1.2% that of superfine cement, and the mass of the swelling agent is 8%-30% that of the superfine cement. The crack repair material has the advantages for being excellent in performance, low in manufacturing cost, environmentally friendly, convenient to construct and good in durability, and the preparation method is simpler.

Description

technical field [0001] The invention belongs to the field of road maintenance and relates to a silicon powder modified superfine cement crack repair material and a preparation method thereof. Background technique [0002] Cement concrete pavement is one of the main forms of road pavement structure in our country. With its advantages of high strength, good durability, excellent stability, strong water damage resistance, convenient maintenance, simple construction machinery, wide source of materials and convenience for night driving, etc. It is widely used in highways at all levels across the country. However, due to the low design strength, thin panels, poor construction quality and untimely maintenance of cement concrete pavement, the damage of concrete pavement can be seen everywhere, especially cracks. [0003] Cement concrete pavement cracks can be divided into surface cracks, penetrating cracks and buried cracks according to their location and characteristics. For medi...

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Problems solved by technology

Although organic repair materials have the functions of bonding, sealing, and reinforcement to cement pavement, they have single performance and narrow application areas. There are great differences in material properties and interface properties from cement concrete. High-modulus epoxy The toughness and bond strength of resin and phenolic materials cannot meet the requirements, and the strength and impact resistance of low-modulus polyurethane and vinyl materials cannot meet the requirements; and the compatibility of organic materials with cement pavement is poor, and the consistency of organic matter is relatively large, making it difficult to completely When filling narrow cement cracks, organic repair materials are easily taken away by tires during use; organic materials also have defects such as high cost and unfavorable environmental protection

Composite repair materials have good overall performance, but their high cost makes it difficult to popularize and use

Inorganic repair materials are economical and environmentally friendly, and have good compatibility with cement pavement. However, this type of material has high rigidity and poor interface adhesion. When used alone, the engineering effect is not ideal, and it needs to be modified before use.

[0005] Most of the existing cement concrete crack repair materials are organic materials, mainly including epoxy resin, polyurethane, methyl methacrylate, phenolic resin, water glass and emulsified asphalt, and the development of inorganic materials is still relatively small.

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