摘要
为探索APP改性沥青油毡作为旧水泥路面沥青加铺层间结构的防裂机理及效果,进行了层间水平拉伸试验、实体工程验证及现场芯样的直剪试验。研制了层间水平拉伸试验台,对其机械组成及工作原理进行了阐述,并将APP油毡作为层间材料进行了水平拉伸试验,表明试验机具有良好的机械性能,且APP油毡具有比其它材料良好的层间防裂性能。将APP油毡应用于试验路,现场钻芯验证了APP油毡具有良好的层间粘结及工作性能。用现场所取芯样的直剪试验表明,有APP油毡夹层芯样剪切破坏位移为7.5 mm,比无油毡夹层时多3.0 mm。试验结果表明:APP改性沥青油毡路用性能良好,作为夹层结构防止旧水泥路面沥青加铺层反射裂缝效果明显。
To research the mechanisms and effects of atactic polypropylene（APP） modified asphalt felt preventing crack,which is used as interlayer between old cement concrete pavement and asphalt overlay,authors carried through the tests of level tension,field road,and direct shearing.A new test-bed machine,named level tension for interlayer,was developed,and its mechanical composition and work principle were also set forth.Using the new machine,level tension tests were conducted with APP modified asphalt felt as interlayer materials,which indicated that the test-bed has favorable mechanical behaviors and the felt had better performance to prevent cracks than any other materials.APP modified asphalt felt was applied to field road,moreover,its favorable interlayer bonding and working performances were proved by field drill cores.The direct shear tests accounted that the shearing destruction displacement comes to 7.5 mm,3.0 mm more than that without the specific interlayer,with the cores from the road.The test results showed that APP modified asphalt felt has good road service performances,with evident effect of anti-cracking when it is used as an interlayer material between asphalt overlay and old cement concrete pavement.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第1期38-41,共4页
Journal of Wuhan University of Technology
基金
国家西部交通建设科技项目(200531881213)
