高粘度抗滑封装薄层沥青路面长效协同作用机理分析

The Analyse of the Long-Term Action Mechanism of High Viscosity Slip-Resistant Encapsulated Thin Layer and Asphalt Pavement

为提高沥青路面行车抗滑耐久性能,研究开发了一种新型的高粘度抗滑封装薄层材料。通过理论分析及室内肯塔堡飞散试验、抗折抗压强度试验、粘附力试验、干缩试验、静态模量试验及小型加载试验开展研究。结果表明:开发的高粘度抗滑封装薄层的弯拉强度标准值大于5.0 MPa,满足重载交通要求;与沥青路面具有很好的粘结力,斜剪试验28 d剪应力可达到0.89 MPa,是沥青路面抗剪要求的1.8倍;-10℃、15℃和60℃三个试验温度下28 d静态模量测定值均在8000 MPa左右,能够抵抗车辆车载及温度应力作用;对于室内小型加速加载试验测试,经过18万次荷载作用,摆值仍能够达到51BPN,远高于规范要求的42BPN。开发的高粘度抗滑封装薄层耐磨、抗剪切能力强、静态模量大,通过与沥青面层协同作用可以提高路面抗滑性能,综合提高沥青路面长效抗滑机制。

In order to improve the long-term performance of asphalt pavement against sliding,a new kind of high viscosity anti-sliding encapsulating thin layer material was developed.Through theoretical analysis and indoor Kentucky dispersion test,flexural and compressive strength test,adhesion test,static modulus test and small load test.The results show that the developed high viscosity anti-slip packaging thin layer has a flexural and tensile strength standard value greater than 5.0 MPa,which meets the requirements of heavy traffic.It has good adhesion with asphalt pavement,and the shear stress of 28 d oblique shear test can reach 0.89 MPa,which is 1.8 times of the shearing strength of asphalt pavement.-10℃,15℃ and 60℃ three test temperature static modulus measurements of 28 d are about 8000 MPa,resistant to vehicle on-board and temperature stress;after 180000 times of loading,the pendulum value still reached 51BPN,far higher than the 42BPN required by the code.Conclusion:the developed high viscosity anti-skid encapsulation thin layer has strong abrasion resistance,shear resistance and static modulus.Through synergistic action with asphalt pavement,the anti-skid performance of pavement can be improved and the long-term anti-skid mechanism of asphalt pavement can be comprehensively improved.