厂拌热再生沥青混合料物理力学性能试验研究

采用4种不同使用年限铣刨料及同一铣刨料的不同掺配率进行系统地厂拌热再生沥青混合料的配合比设计及物理力学性能试验。结果表明,对于不同老化程度的铣刨料,在同一铣刨料的掺配率下,铣刨料中回收沥青老化越严重,热再生沥青混合料的60℃稳定度越大,毛体积密度、空隙率和水稳定性越差,但变化幅度不大。对于同种铣刨料,混合料的毛体积密度及残留稳定度随着铣刨料掺配率的增加而呈减小的趋势,混合料的空隙率随着铣刨料掺配率的增大而增大,而混合料的动稳定度则表现先增加后减小的趋势。

Experimental Research on Physical and Mechanical Properties of Plant Mix Heat-recycled Asphalt Mixture

Four kinds of milling planing materials with the different durable years and a kind of milling planing material with the different mixing rates are used to systematically carry out the design of mix proportion and the experiment of physical and mechanical properties of the plant mix heat-recycled asphalt mixture.The results show that for the milling planning materials with the different aging degrees and at the mixing rate of the same milling plan material,the more serious the aging of asphalt recycled in milling planning material,the greater the 600C stability of heat-recycled asphalt mixture,and the worse the bulk density,the void content and the water stability.But the range of variation is not large.For the same milling planing material,the bulk density and the residual stability of mixture decrease with the increase of mixing rate of milling planing material.The void content of mixture increases with the increase of mixing rate of milling planing material,while the dynamic stability of mixture shows a trend of increase at first and then decrease.