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半刚性基层沥青路面抗裂缝连续施工技术改变了传统施工方法中的基-面层层间结合状态,使基层和面层粒料能够互相嵌入,有效提高了道路基面层的层间结合强度。该文通过基面层层间剪切、拉拔试验,对比分析了传统施工方法与连续施工方法,以及连续施工不同延迟成型时间、压实度控制条件下半刚性基层与沥青混合料面层之间的层间粘结性能。结果表明:连续施工方法成型的试件其层间粘结强度和摩擦系数均高于传统方法成型的试件;连续施工中采用基层初始压实度为96%~98%可使基面层间获得较高的粘结强度;在基层混合料凝结硬化前,延迟成型对层间粘结强度的影响较小,超过该时间,则会对层间粘结强度造成一定损失;当连续施工基层初始压实度为96%~98%时,可使道路基面层层间嵌挤深度达到8~10mm,基面层间能够较好地相互嵌挤咬合,使基面层结构形成连续的整体。
Semi-rigid base asphalt pavement anti-cracking continuous construction technology changes the traditional construction method of base - surface layer bonding state, so that the grassroots and surface layer of particles can be embedded with each other, effectively improve the road base layer of the interlayer bonding strength. Based on the interlaminar shearing and drawing tests, this paper compares and analyzes the traditional construction methods and continuous construction methods, as well as the different lag forming time and degree of compaction control between semi-rigid base and asphalt mixture Between the interlayer bonding performance. The results show that the bond strength and friction coefficient of the specimens formed by continuous construction method are higher than those of the traditional method. The initial compaction degree of 96% ~ 98% Get a higher bond strength; before the base material mixture is set and hardened, the delayed forming has little effect on the interlaminar bond strength, beyond this time, it will cause some loss between the interlaminar bond strength; When compaction degree is 96% -98%, the embedding depth of the road surface layer can reach 8-10mm, and the base surface layers can be well pressed and engaged with each other, so that the base surface layer structure forms a continuous whole.