多孔沥青混合料压实关键技术研究

Research on Key Technologies of Porous Asphalt Concrete Compaction

多孔沥青混合料所形成的大空隙结构,使其在压实特性上与密级配沥青混合料存在较大差异,而规范上对于多孔沥青混合料的压实技术没有特定说明。通过室内旋转压实方法成型多孔沥青混合料试件,对其压实特性进行分析,得出多孔沥青混合料在施工压实阶段的可压实性较好,较之与密级配沥青混合料,达到相同密实度时所需压实功较小。现场试验路的压实结果验证了室内研究结果,即多孔沥青混合料所需施工压实功较小。施工中,推荐初压采用10~12 t压路机静压2遍,复压和终压采用13~16 t压路机,各静压2~3遍。

The big void sturcture of porous asphalt concrete makes different compaction characteristics,while there are no specific illustrates on the PAC＇s construction technical specification.Molding porous asphalt concrete specimens use Superpave Gyratory Compactor in the lab,analyzed its compaction characteristics.The results show that porous asphalt concrete has well compaction characteristics,compared with graded asphalt mixture,it needs small compaction power when reach the same compactness.Compaction results of test road verified the research results in the lab,that＇s to say the compaction power of porous asphalt concrete compacted is smaller.Recommended two pass of initial pressure with 10～12 t roller,2～3 passes of secondary pressure with 13～16 t roller,static pressure through the compaction process.