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Of highway asphalt pavement skid surface with coarse aggregate , mainly for lack of basalt and granite , Chongqing similar to the hard basalt stone , but rich in limestone and sandstone , limestone accounted absolutely Yuxiang highway along the existing materials most , while the distribution of a small amount of sandstone , but there is no past highway asphalt pavement skid surface with more basalt , granite , To buy from field , higher freight costs . Therefore , looking for local materials can be used for highway asphalt pavement skid surface of the highway construction must solve the problem . Limestone as a new pavement material for asphalt pavement surface Yuxiang highway construction have great economic benefits , not only can greatly reduce the project cost , but also to promote local economic development . The article mainly from the characteristics of the aggregate as well as the composition of the mixed material affect two aspects of the performance of asphalt pavement skid surface combined with Yuxiang highway engineering , conducted a feasibility study for asphalt pavement skid surface layer of limestone . On the one hand , the article by freezing and thawing test the robustness of the test , wear test , impact test, crush test , sturdy test trials , compared limestone , sandstone , basalt aggregate of the physical and mechanical properties and skid resistance after grinding performance research, studies have shown that the limestone meet the physical and mechanical indexes asphalt pavement construction specification requirements for aggregate performance , considering the wear value , shock value , crushing value , sturdy , polished value indicators , limestone sliding wear resistance is 57% of the basalt ; hand, small accelerated loading test mixture of limestone , basalt aggregate formation , as well as through long - term skid resistance of asphalt mixture indoor evaluation method --- with a limestone material but using anti - sliding wear resistance of the mixture formed in different gradations , also raised a fineness modulus aggregate structure depth estimated formula and prove the feasibility of the formula . The research results for the estimated pavement skid performance has a certain theoretical significance and practical value .
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