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采用三点弯曲断裂、疲劳试验,室内加速加载磨耗试验和温缩系数试验研究薄层环氧铺装材料的低温性能。试验结果表明在-10℃时其弯拉断裂应变大于4 000μm/m。当加载的疲劳应变大于1 000μm/m时,仍表现出很好的低温抗疲劳性能。加速加载磨耗次数达到6万次后表面构造浓度大于1 mm,温缩系数为5.88×10-5/℃,水泥混凝土板表面浮浆清除和糙面处理可有效地增加界面黏结强度,以抵抗低温收缩应力,避免层间黏结不足而产生的脱层问题。
The low temperature performance of the thin-layer epoxy pavement was studied by three-point bending fracture test, fatigue test, accelerated loading and abrasion test and shrinkage coefficient test. The experimental results show that the bending strain at break is greater than 4 000 μm / m at -10 ℃. When the loaded fatigue strain is more than 1 000μm / m, it still shows good low temperature fatigue resistance. The surface structure concentration is more than 1 mm and the coefficient of thermal contraction is 5.88 × 10-5 / ℃ after 60,000 cycles of accelerated loading and abrasion, and the floating and surface treatment of cement concrete slab can effectively increase the interfacial bonding strength to resist low temperature Shrinkage stress, to avoid the problem of delamination caused by insufficient bonding between layers.