Permeable reservoir mainly plays a transitional coupling role. When the permeable oil layer spreads to the base, it will form a certain penetration depth on the base, fill the surface gaps of semi-rigid base, and form a special structural layer, that is, the coupling layer itself belongs to the base, which reduces the modulus of the base material, thus solving the bonding problem between organic binder and inorganic binder.
The function of permeable oil layer is mainly reflected in the following aspects: first, it improves the continuity of pavement structure design, from multi-layer combined system to continuous combined system; Secondly, the function of permeable oil layer is equivalent to increasing the thickness of flexible material structure layer, thus improving the deformation resistance of pavement structure; Thirdly, after the permeable oil layer penetrates into the base, the open pores of the base mixture are closed, which enhances the ability of the base to resist water damage; Finally, the permeable reservoir can avoid the evaporation of water at the grass-roots level and save the maintenance cost of sprinkler.
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