Quick repairing method of old cement concrete pavement

Abstract

The invention discloses a quick repairing method of an old cement concrete pavement. High-grade Portland cement or special cement, a mixed aggregate, a self-made aqueous polymer emulsion and a retarder are manually or mechanically mixed at normal temperature, a high-adhesion quick-drying powerful ultrathin cover surface can be rapidly formed by adopting a quick scraping or spraying method, and is tightly combined with an old concrete surface layer into a whole. The quick repairing method disclosed by the invention is applied to quick repairing of a municipal administration cement pavement; the characteristic that a conventional cement concrete road reaches design strength by curing for 28 days when being repaired is changed, the old cement concrete pavement is finally settled at temperature of 25 DEG C for 2-4h by adopting the quick repairing method disclosed by the invention, the problem of traffics is solved; meanwhile, the repaired old cement concrete pavement is convenient to construct and powerful in adhesion, and resists heat and frost.

Description

technical field [0001] The invention belongs to cement concrete pavement maintenance technology, and in particular relates to a quick repair method for old cement concrete pavement. Background technique [0002] With the development of China's social economy, the construction of cement pavement in Chinese cities is changing with each passing day. The total length of roads in my country is more than 2 million kilometers, of which cement concrete pavement accounts for about 32%. According to incomplete statistics, there are 50% of my country's existing cement concrete pavement. %-60% need timely and effective repair and maintenance. Due to heavy traffic, speeding and overloading, ordinary concrete cannot bear the heavy responsibility in the field of maintenance and repair. [0003] When repairing the existing concrete road surface, the newly poured concrete is usually directly poured into the pit, the surface and the road surface are smoothed, and the repair is completed after...

AI Technical Summary

Problems solved by technology

Due to heavy traffic, speeding and overloading, ordinary concrete cannot bear the heavy responsibility in the field of maintenance and repair

[0003] When repairing the existing concrete highway pavement, the newly poured concrete is usually directly poured into the pit, the surface and the road surface are smoothed, and the repair is completed after maintenance. This method has a long construction time. , Low adhesion to the original cement concrete, easy to fall off and other defects

At present, there is also early-strength concrete on the market, but its disadvantages such as high cost, construction limitations, and later strength have not been able to be widely used.

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