Frost-weathering construction method of channel lining concrete

Abstract

The invention provides a frost-weathering construction method of channel lining concrete. The frost-weathering construction method comprises the following steps of: leveling a concrete surface; vibrating the concrete by using a plate vibrator until grout is formed on the surface; removing excess water in the concrete by using a vacuum hydro-exhaustion machine; stopping the vacuum hydro-exhaustion machine; revibrating the concrete by using the plate vibrator; revibrating the concrete to extract the grout before the initial condensation of the concrete; manually plastering to finish the surface; covering a moisturizing film on the surface; heating and maintaining the concrete surface by adopting a mobile infrared ray heating beam; and watering to moisturize and maintain the concrete surface so as to complete the frost-weathering construction of the channel lining concrete of the channel. The frost-weathering construction method is applicable to the channel lining concrete with large area and thin thickness; and when the frost-weathering construction method is adopted, both frost thawing resistance and frost heaving resistance of the channel lining concrete can be improved, the time of peeling the frosted surface of the concrete can be prolonged, and compactness and strength of the concrete can also be increased; and moreover the frost-weathering construction method has the advantages of simplicity in operation as well as low difficulty and quickness in construction, can be used for greatly accelerating the construction progress, and is slightly affected by environmental factors as a construction process in a special season.

Description

technical field [0001] The invention relates to a method for constructing channel lining concrete in a freeze-thaw environment. Background technique [0002] Spalling is the main form of damage to concrete subjected to freeze-thaw cycles. In engineering practice, the surface of concrete components often peels off due to freeze-thaw damage, and the surface peeling will quickly reduce the overall frost resistance of the concrete, resulting in component failure. To improve the frost resistance of concrete, the usual practice is to use air-entraining agents in the concrete mix. However, when air-entraining agents are used in many projects, the concrete still peels off. In the case of a reasonable mix ratio, the construction process has a great influence on the frost resistance of the concrete. The traditional construction process cannot improve the frost resistance of the channel lining concrete and solve the problem of concrete surface spalling. Contents of the invention ...

AI Technical Summary

Problems solved by technology

In the case of a reasonable mix ratio, the construction process has a great influence on the frost resistance of the concrete. The traditional construction process cannot improve the frost resistance of the channel lining concrete and solve the problem of concrete surface spalling.