(1) due to the existence of joints and cracks, the old cement concrete pavement as the base of the overall strength is reduced, and under the action of external forces, the asphalt overlay in the three-dimensional stress state. The vehicle passing adiscontinuous board, because the joints and cracks on both sides of the adjacent plate reflecting cracks of vertical displacement difference, asphalt overlay in the corresponding position of the larger shear stress, the shear stress is the main reason of asphalt pavement reflection cracks produced. Usually referred to as the load type reflective crack.(2) due to the exposure of the pavement in the atmosphere, the asphalt overlay and the old cement concrete face have the shrinkage and the temperature stress. Because of the Old Cement Concrete Pavement Stress in the joints is not continuous, so the asphalt overlay and bear it and the old pavement caused by temperature stress, especially under low temperature in winter, the asphalt overlay at the seams, cracks, because of excessive tensile stress and cracking formation temperature reflection crack.The mechanism of 3 glass fiber grid to restrain reflection crackThe glass fiber grid has the advantages of high tensile strength, low elongation and no creep
Geotextiles are used for road, railway, tunnel, dam, tailings treatment, isolation, filtration, drainage, reinforcement, protection and enhancement...Analysis of the causes of cracks in the asphalt overlay, the formation of a new type of excellent geotechnical substrates by special coating process.Asphalt overlay on old cement concrete pavement is a kind of special pavement structure, and its stress and strain characteristics are quite different from those of general elastic layered system.
In the local municipal quota to look for, if not, then only by the actual market price in order to supplement the purpose of the form to supplement the input calculation. General municipal quota will have the corresponding sub purpose, you can look at.Fiberglass geogrid with glass fiber rovings as the main raw material, the reticular structure material of the knitting process, to protect and improve the overall use of polyester glass fiber geogrid with high strength aramid fibre filament, warp knitting weaving cloth after directional grid slab, geotechnical grille into coated processing.
