轻质高效能木质沥青混合料的弹性降噪性能  

Elastic and noise reduction performance of light weight and high efficacy wood bituminous mixtures

作　　者：李蕊[1] 李彦伟[2] 石鑫[2] 温永[1] 裴建中[1] 于澎[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]石家庄市交通运输局,河北石家庄050051

出　　处：《长安大学学报（自然科学版）》2012年第4期21-24,50,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：交通运输部西部交通建设科技项目(2011319812020);陕西省自然科学基础研究计划重点项目(2010JZ009);教育部创新团队发展计划项目(IRT1050);中央高校基本科研业务费专项资金项目(CHD2011JC098)

摘　　要：为研究木质沥青混合料的性能优势,采用应力、应变、泊松比和比强度对木质沥青混合料与石质沥青混合料进行了力学性能比较;利用GB反弹系数和吸声系数,对木质沥青混合料和石质沥青混合料的弹性性能和降噪性能进行了比较。结果表明:木质沥青混合料的应力-应变曲线平缓,呈柔性破坏,且泊松比高出石质沥青混合料60%～80%,抗压比强度和劈裂比强度与石质混合料相比高出10%～20%;木质沥青混合料的GB反弹系数为石质沥青混合料的1/9～1/2,表明木质沥青混合料具有更加优异的弹性恢复能力;木质沥青混合料的吸声系数超过石质沥青混合料1倍以上,表现出良好的吸声性能。To study the advantages of wood bituminous mixtures performance, the strain, stress, Poisson＇s ratio, and specific strength were used to evaluate the mechanical properties of wood bituminous mixtures and stone bituminous mixtures. Meanwhile, GB rebounding coefficient and absorption coefficient of wood bituminous mixtures were investigated and compared with stone bi- tuminous mixtures in elastic properties and noise reduction performance. The results show that the stress-strain curve of wood bituminous mixtures is gentle and exhibits flexible failure. The Poisson＇s ratio and specific strength of wood bituminous mixtures are promoted from 60% to 80% and 10% to 20% respectively compared with stone bituminous mixtures. Furthermore, the GB rebounding coefficient and absorption coefficient of wood bituminous mixtures are from 1/9 to 1/2 and two times respectively of the ones of stone bituminous mixtures. Those show that the wood bituminous mixtures have excellent elastic properties and noise reduction performance. 6 tabs, 6 figs, 6 refs.

关 键 词：道路工程 木质沥青混合料 力学性能 比强度 弹性性能 降噪性能 

分 类 号：U414.75[交通运输工程—道路与铁道工程]