Whether it is a new pavement or an old pavement, there will be gaps of one kind or another. In the new pavement, there will be various joints of different shapes, and the water that falls on the surface of the pavement will pass through the pavement joints and the surface pores. Directly infiltrated into the interior of the pavement structure; while the old roads have a long service life, there will be some loose and cracked phenomena. When the groundwater level rises, the groundwater will rise through the capillary into the lower part of the pavement structure, causing the road to be stagnant. At the same time, for other reasons, in the case of water on both sides of the road, the water will also infiltrate directly along the road surface. Inside the pavement structure.
Free water entering the pavement structure is the primary cause of causing or accelerating road damage. The moisture enclosed in the pavement structure penetrates into the interior of the structure, which easily causes deformation of the inner layer of the road, and the strength of the concrete material is reduced, thereby enabling the pressure capacity. Reduced and shortened service life. Even more frightening is that because the pavement is a layered structure, the free water entering the pores will exert a lot of pressure under the driving load. According to the test, the pressure difference can reach 69 kPa. This pressure can cause the asphalt surface layer to peel off and loosen, which makes the performance of the whole pavement structure deteriorate rapidly. In severe cases, even the concrete layer is staggered and the bottom of the plate is emptied. It seriously threatens the safety and service life of the road.