Repair method of structural water damage of asphalt pavement with cement-cured base layer

Abstract

The invention discloses a repair method of a structural water damage of an asphalt pavement with a cement-cured base layer, belonging to the field of maintenance and repair of road works. The method comprises the following repair steps: a) milling damaged surface layer and base layer structure and arranging transverse drainpipe; b) arranging lower sealing layer; and c) paving macroporous asphalt mixture layer, dense-graded asphalt mixture surface layer, etc. Compared with prior art, the method provided by the invention is environmentally friendly and highly efficient, can maintain a long-term and continuous use of the pavement structure, and has a good application value.

Description

technical field [0001] The invention relates to the field of maintenance and repair of road engineering, in particular to a method for repairing water damage of asphalt pavement structure of cement treatment base. Background technique [0002] Due to the wide source of raw materials and low cost, cement treatment base materials have unique resource advantages and economic advantages in my country, accounting for more than 85% of the base level of roads at all levels in my country, and play a pivotal role in highway pavement construction. The main load-bearing layer determines the length of service life of the pavement. [0003] From the perspective of performance, the advantages of cement-treated base materials are high rigidity and good board performance. The disadvantage is that dry shrinkage and temperature shrinkage cracks are prone to occur, resulting in a large number of reflective cracks on the asphalt pavement. Because the cement treatment material is very dense, it ...

AI Technical Summary

Problems solved by technology

[0003] From the perspective of performance, the advantages of cement-treated base materials are high rigidity and good board performance. The disadvantage is that dry shrinkage and temperature shrinkage cracks are prone to occur, resulting in a large number of reflection cracks on the asphalt pavement.

Because the cement treatment material is very dense, it is difficult to discharge the water infiltrated into the base from cracks, between structural layers, the central divider or asphalt layer, and the pavement structure will soon appear pumping, loosening and potholes under the repeated action of driving load or freezing and thawing and other diseases have a serious impact on driving safety

For such structural water damage on the pavement, the traditional maintenance method is to dig out the diseased structure and re-pave the cement-treated base structure. Since the cement-treated base requires at least 7 days of curing time to pave the asphalt surface structure, this method not only The maintenance cycle is long, and the recurrence of structural water damage cannot be avoided, and the effect is not good

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