The compaction characteristics of asphalt mixture for stress absorbing layer were investigated to ensure the construction workability.Gyratory compactor was used to prepare mixture specimen and the relation between the number of gyratory compaction and the degree of compaction was used to investigate the effects of asphalt content,compaction temperature and aggregate gradation.Test results indicated that compaction energy index,compaction rate and the numbers of gyratory compaction at the corresponding degree of compaction of 95％and 99％could be used as compaction parameters.Among these parameters,the compaction rate was not suitable for proper evaluation for mix-ture compaction.The numbers of gyratory compaction at the corresponding degree of compaction of 95％and 99％were found to be 10 and 35 gyrations,which can be used to determine the optimum asphalt content.The critical sieve si-zes for asphalt mixture for stress absorbing layer were 1.18 mm and 2.36 mm and the reasonable passing ranges were found to be 45％～50％and 65％～75％,respectively.
关键词
应力吸收层/旋转压实/压实特性/压实温度/级配控制
Key words
stress absorbing layer/gyratory compaction/compaction characteristics/compaction tempera-ture/gradation control
维普
万方数据