Countermeasure of Disease Prevention and Cure for Asphalt Highway

Asphalt concrete pavement disease there are many factors, there are design reasons, there are construction reasons. In view of the early characteristics of asphalt concrete pavement disease, especially the following three suggestions.

First, as appropriate thinner asphalt surface layer thickness. Mainly for the following four considerations. 1, semi-rigid asphalt pavement structure of the carrying capacity of semi-rigid material layer (base and sub-base) to bear, without thickening the surface layer to improve the carrying capacity. 2, to improve the performance of asphalt pavement is not a thick asphalt surface layer, but with high quality asphalt. 3, the asphalt surface cracks not only reflective cracks in the normal construction, most of the asphalt surface layer itself temperature cracking. 4, in general, thick asphalt surface easily lead to rut. At the same time, should also strengthen the asphalt pavement waterproof design, choose a reasonable grass-roots and sub-base structure.
Second, strictly control the quality of asphalt mixture. Asphalt to use a good high and low temperature performance, anti-aging properties, low wax content, high-viscosity high-quality domestic or imported asphalt. Aggregate should use the surface roughness, stone hard, wear resistance, embedded crowded role, and good adhesion properties of asphalt aggregate. At the same time, according to local climatic conditions and traffic conditions, the asphalt mixture gradation scientific design, high temperature stability and fatigue performance, low temperature crack resistance, durability and other road performance as much as possible with each other.
Third, strict control of construction quality. Asphalt pavement construction (DAB60-A100,DAB60-A50B,DAP60-A100)must be based on total quality management requirements, establish and improve the effective quality assurance system, the implementation of target management, process management, clear responsibility for the construction process, the quality of each process to conduct strict inspection, control, Control the mixing quality of asphalt mixture to ensure a good top surface roughness, a reasonable sprinkle through the oil layer, sticky layer of oil, improve the quality of paving surface to ensure that meet quality standards.
 

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