一、磨耗层的使用寿命和用料定额试行指标: 为使磨耗层的铺装与养护能保证在一定期限内的正常使用,亦使于有计划的定期进行中修起见,特根据所选用各种不同材料的结构类型,在行车不同程度的磨耗情况下,定出各种使用年限指标与用料定额指标如下表: First, the service life of wear layer and the amount of materials Trial pilot indicators: in order to wear layer of pavement and maintenance to ensure the normal use within a certain period of time, but also in the planned period of regular repair, special according to the selection of each Different types of structural types of materials, driving in different degrees of wear and tear, set a variety of service life indicators and materials quota indicators in the following table: