Method for repairing expressway pavement

Abstract

The invention discloses a method for repairing an expressway pavement. The method comprises the following steps: weighing the following raw materials in parts by weight: 55-65 parts of Portland cement, 78-86 parts of gravel, 21-29 parts of polystyrene resins, 8-16 parts of fatty alcohol-polyoxyethylene ether, 16-24 parts of calamine, 11-19 parts of chitin, 20-28 parts of sodium hydroxide and 40-50 parts of tartaric acid; grinding and mixing the polystyrene resins, fatty alcohol-polyoxyethylene ether, calamine and chitin; adding the Portland cement, gravel and sodium hydroxide respectively for uniformly stirring, adding water for stirring and standing, and adding tartaric acid for stirring and standing so as to obtain a repair material; pouring the repair material onto a damaged pavement, leveling, and maintaining, thereby completing repair. The material disclosed by the invention is used for rapid and efficient repair of the expressway pavement, the process is simple and feasible, rolling is not needed, and all that is needed is simple paving and flattening. According to the concrete pavement repair method disclosed by the invention, the pavement can be open to traffic after being repaired within an hour, the traffic opening time can be greatly shortened, and repeated repair is not needed after one-step repair.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a method for repairing highway pavement. Background technique [0002] With the rapid development of my country's national economy, the construction of various roads, bridges, and municipal projects is rapid. Among them, the proportion of cement concrete pavement increased significantly. Under the repeated action of loads and the continuous influence of factors such as freeze-thaw cycle, salt freezing, carbonization, etc., as well as the combined effects of many factors such as design, construction, and maintenance, the cement concrete pavement will inevitably deteriorate during use. Various damages, such as cracks, potholes, cracks, etc., will affect the speed and quality of traffic and cause traffic problems. In order to minimize traffic problems, repairs to damaged pavement must be carried out in a timely manner. [0003] At present, the commonly used repair method is ...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used repair method is to re-cast ordinary cement concrete on the damaged road surface. Due to the long maintenance time after repairing the road surface by this traditional repair method, it generally takes 3 to 7 days to open to traffic. In fact, cement concrete needs 28 days to achieve its strength. Stability, coupled with the poor adhesion and large shrinkage of ordinary concrete, resulting in poor durability of the repaired road surface, one place often needs to be repaired repeatedly, the construction is complicated and the operation time is long

Images