机场跑道路面混凝土不停航施工技术研究

摘要

根据A工程地区气候特征,荷载条件,施工经济性方面选择采用SBS 改性沥青混合料进行机场道面罩面不停航施工.利用马歇尔试验、施工期压实度、矿料级配油石比对施工现场的改性沥青混合料进行施工技术评价.研究结果表明:改性后的日本90#+5％和克拉玛依 1 10#+5％的动稳定度分别提高了3.43％和3.46％;改性后的日本90#+5％破坏应力和破坏应变均提高了1.15％,劲度横梁下降1.16％,克拉玛依沥青K+5％SBS 破坏应力和破坏应变提高了 1.19％;日本90#+5％SBS 的沥青残留稳定度提高了 12％,冻融劈裂强度比提高 12％;克拉玛依沥青 K+5％SBS 沥青残留稳定度提高了5％,冻融劈裂强度比提高 1 1％;RB+5％SBS 和克拉玛依沥青 K+5％SBS 的抗疲劳强度都得到了较小幅度的提高.表明两种混合料的高温稳定性、低温抗裂性、水稳定性和抗疲劳性都得到了明显提高,满足使用要求.%according to the climatic characteristics and load conditions of A project area,SBS modified asphalt mixture is chosen to carry out the construction of airport road face mask.The construc-tion technology evaluation of the modified asphalt mixture in the construction site was carried out with Marshall test,construction period compaction degree and ore gradation.The results showed that the dy-namic stability of the modified 90#+5％and karamay 1 10#+5％increased by 3.43％and 3.46％re-spectively.After modification,the damage stress and failure strain of 90#+5％in Japan increased by 1.15％,and the strength beam decreased by 1.16％,and the damage stress and failure strain of kara-may asphalt K+5％increased by 1.19％.The stability of asphalt residual in Japan＇s 90#+5％SBS in-creased by 12％,and the crack strength of freeze －thaw skin increased by 12％.The residual stability of karamay pitch K+5％SBS was increased by 5％,and the crack intensity of freeze －thaw skin increased by 1 1％.The fatigue strength of RB+5％SBS and karamay asphalt K+5％SBS was improved by a small margin.It is shown that the high temperature stability,low temperature crack resistance,water stability and fatigue resistance of the two kinds of mixtures have been improved obviously.