白改黑工程中反射裂缝防治措施研究

旧水泥混凝土路面白改黑工程中反射裂缝防治措施对延长路面使用寿命意义重大。文章通过间接弯拉试验、间接剪切试验、轮碾试验，分别测试采用无夹层、封层、封层＋防水卷材、封层＋土工布、封层＋玻纤格栅、封层＋聚酯纤维布等不同防裂夹层材料的防裂措施的层间间接弯拉强度、间接抗剪强度及其轮碾疲劳寿命，并结合实体工程对防水卷材的防裂效果进行跟踪调查，进一步说明其反射裂缝防治措施的可行性。

Study on Reflection Crack Control Measures in White-to-Black Engineering

In the white-to-black engineering of old cement concrete pavement, the reflection crack control measures have the major significance to extend the pavement life.Through indirect bending test, indirect shear test, and wheel grind test, the article respectively tested the indirect bending tensile strength, indirect shear strength and its wheel-grinding fatigue life between layers of crack control measures by applying different crack-prevention sandwich materials of no interlayer, sealing layer, sealing layer＋ waterproofing coiled material, sealing layer＋ geotextile, sealing layer＋ glass fiber grille, sealing layer＋ polyester fiber cloth,and conducted the tracking survey on the crack control effect of waterproofing coiled materials in combination with actual engineering,which further illustrated its feasibility of reflection crack control measures.