Wang Wenfeng, Duan Shaochan, Zhu Haoran
National Engineering Laboratory for Advanced Road Materials, JSTI Group, Nanjing 210017, China.
Materials (Basel). 2021 Mar 16;14(6):1449. doi: 10.3390/ma14061449.
In order to improve the durability of the asphalt pavement on a cement concrete bridge, this study investigated the effect of the modulus of the asphalt mixture at the bottom layer on the mechanical response of bridge pavement, along with a type of emerging bridge pavement structure. In addition, the design method and pavement performance of a high-modulus asphalt mixture were investigated using laboratory and field tests, and the life expectancy of the deck pavement structure was predicted based on the rutting deformation. The results showed that the application of a high-modulus asphalt mixture as the bottom asphalt layer decreased the stress level of the pavement structure. The new high-modulus asphalt mixture displayed excellent comprehensive performance, i.e., the dynamic stability reached 9632 times/mm and the fatigue life reached 1.65 million cycles. Based on the rutting depth prediction, using high-modulus mixtures for the bridge pavement prolonged the service life from the original 5 years to 10 years, which significantly enhanced the durability of the pavement structure. These research results could be of potential interest for practical applications in the construction industry.
为提高水泥混凝土桥沥青路面的耐久性，本研究结合一种新型桥路面结构，探究了底层沥青混合料模量对桥路面力学响应的影响。此外，通过室内试验和现场试验研究了高模量沥青混合料的设计方法及路面性能，并基于车辙变形预测了桥面铺装结构的使用寿命。结果表明，采用高模量沥青混合料作为底层沥青层可降低路面结构的应力水平。新型高模量沥青混合料表现出优异的综合性能，即动稳定度达到9632次/mm，疲劳寿命达到165万次。基于车辙深度预测，采用高模量混合料用于桥面铺装可使使用寿命从原来的5年延长至10年，显著提高了路面结构的耐久性。这些研究成果在建筑行业的实际应用中可能具有潜在价值。
