When the base oil is used to maintain the base, it is required that the base oil seeps into the base. Generally speaking, it is better to penetrate 5- 10 mm or more. If it can't penetrate to the base, it will only be sprinkled on the surface to form an oil film (or oil skin), which will not be consolidated, stable, combined and waterproof. Even after spraying hot asphalt on the prime coat for sealing, it will be stuck and pushed off by transport vehicles and pavers during construction. Therefore, the deeper the bottom oil penetrates into the bottom, the better.

infiltration

Fill the tiny cracks on the surface of the base: the priming oil contains some asphalt, which can fill the cracks after infiltration. The surface of the consolidated base is loose: the loose fine aggregate on the surface of the base is inevitable and cannot be eliminated, and the asphalt in the base oil has the consolidation effect. Improve the surface strength and integrity of the base: the surface of the base is the weak link of its overall strength, and the bottom oil can make up for it.

Increase the contact between the base and the pavement: China's highway pavement is designed as a multi-layer elastic system, and the conditions between layers are completely continuous, and the combination between layers of pavement structure is not tight. Theoretically, the thickness of the structural layer will increase, which is economically wasteful. Therefore, the prime coat oil aims to strengthen the bond between semi-rigid base and asphalt surface, and make the bond between layers as close as possible to a completely continuous state.

When the base oil is used to maintain the base, it is required that the base oil seeps into the base. Generally speaking, it is better to penetrate 5- 10 mm or more. If it can't penetrate to the base, it will only be sprinkled on the surface to form an oil film (or oil skin), which will not be consolidated, stable, combined and waterproof. Even after spraying hot asphalt on the prime coat for sealing, it will be stuck and pushed off by transport vehicles and pavers during construction. Therefore, the deeper the bottom oil penetrates into the bottom, the better.