橡胶沥青应力吸收层在城市新建道路中的应用研究

Research on Application of Rubber Asphalt Stress Absorbing Layer in Newly Built Urban Roads

为减少或延缓城市道路半刚性基层反射裂缝的萌生、扩展,通过室内试验研究了橡胶沥青应力吸收层路用性能,分析其作为半刚性基础抗裂措施的抗裂效果。结合城市新建道路工程现场试验段,对其施工工艺和施工质量控制要点进行了总结,提高了现场施工的质量,并对现场试验段的长期使用效果进行跟踪观察。结果表明,铺设橡胶沥青应力吸收层后,路面的疲劳、剪切、拉拔和低温抗裂性能均具有较大的提高,其路面在使用较长一段时间后均未出现反射裂缝,其能较好的防止或延缓反射裂缝的产生、扩展。

In order to reduce or delay the initiation and expansion of reflective cracks in semi-rigid base of urban roads,the pavement performance of rubber asphalt stress absorption layer is studied through laboratory tests.And its anti-cracking effect as a semi-rigid foundation anti-cracking measure is analyzed.Combined with the field test section of newly built urban road engineering,its construction technologies and construction quality control essentials are summarized.The quality of field construction is improved,and the long-term use effect of field test section is tracked and observed.The results show that after paving the rubber asphalt stress absorption layer,the fatigue,shearing,drawing and low-temperature crack resistance performance of the pavement are greatly improved.The pavement has no reflective cracks after a longer period of use.It can better prevent or delay the generation and expansion of reflection cracks.