Method for quickly repairing concrete road surface

Abstract

The invention discloses a method for quickly repairing a concrete road surface. Each cubic meter of road surface repairing materials adopted by the method comprise the following components by weight: 333 to 387kg of metakaolin, 138kg of slag, 28 to 82kg of ordinary Portland cement, 415kg of water glass, 708kg of medium sand and 1,505kg of stones (5-20mm), wherein the modulus of the water glass is1.4; the water cement ratio of the formula is 0.37 to 0.39; the water content comprises the contained water of the water glass and the externally added water; and the amount of the externally added water is co-determined by the water cement ratio and the contained water of the water glass. Compared with the ordinary cement concrete repairing method, the method of the invention can greatly shortenthe open traffic time; the road repaired by the method of the invention can be used only 8 to 10 hours later at most; and the durability of the repairing materials and the bonding property of the newand old concrete are far superior to those of the ordinary concrete repairing material.

Description

technical field [0001] The invention belongs to cement concrete pavement maintenance technology, in particular to a quick repair method for damaged concrete pavement. Background technique [0002] The current total length of roads in my country is more than 2 million kilometers, of which cement concrete pavement accounts for about 60%. According to incomplete statistics, 50% to 60% of my country's existing cement concrete pavement needs to be repaired. Therefore, it is necessary to develop fast and durable repair materials. And repair method more and more people's attention. [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 ordin...

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. Because this traditional repair method takes a long time to repair the road surface, it generally takes 3 to 7 days In fact, it takes 28 days for cement concrete to stabilize its strength. In addition, ordinary concrete has poor adhesion and large shrinkage, resulting in poor durability of the repaired road surface. A place often needs to be repaired repeatedly.