Takaikaew Thaworn, Hoy Menglim, Horpibulsuk Suksun, Arulrajah Arul, Mohammadinia Alireza, Horpibulsuk Jitwadee
School of Civil Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
Center of Excellence in Innovation for Sustainable Infrastructure Development, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
Heliyon. 2021 May 14;7(5):e07015. doi: 10.1016/j.heliyon.2021.e07015. eCollection 2021 May.
This study reports on the laboratory performance, field performance and cost analysis of fiber-reinforced asphalt concrete (FR-AC) pavement using AC60/70 and polymer modified asphalt (PMA) as binders. The performance testing included indirect tensile resilient modulus, indirect tensile strength modulus, indirect tensile fatigue life, dynamic creep and wheel-tracker tests. Field trials of AC60/70 and PMA mixtures, were undertaken with and without fibers and the International Roughness Index, texture depth, and rutting of the mixtures were measured over time. The PMA + Fiber mixture exhibited the best performance among the materials tested. The performance of AC60/70 + Fiber mixture were comparable to PMA mixture. The improvement of both fatigue cracking and rutting were similar for AC60/70 + Fiber mixtures while the improvement of fatigue cracking was higher than rutting for the PMA mixtures. Since the performance of FR-AC was similar for both laboratory and plant mixed specimens, the laboratory mix design results can be used to interpret the field performance. The fiber reinforced AC60/70 mixture was found to be the most economical. The outcome of this research can be used as a guide, for establishing the specification of FR-AC pavement in Thailand and other countries using similar mix design.
本研究报告了以AC60/70和聚合物改性沥青（PMA）作为粘结剂的纤维增强沥青混凝土（FR-AC）路面的实验室性能、现场性能及成本分析。性能测试包括间接拉伸回弹模量、间接拉伸强度模量、间接拉伸疲劳寿命、动态蠕变和车辙试验。对AC60/70和PMA混合料进行了有无纤维的现场试验，并随时间测量了混合料的国际平整度指数、纹理深度和车辙情况。在测试的材料中，PMA+纤维混合料表现出最佳性能。AC60/70+纤维混合料的性能与PMA混合料相当。AC60/70+纤维混合料在疲劳开裂和车辙方面的改善效果相近，而PMA混合料在疲劳开裂方面的改善效果高于车辙。由于FR-AC在实验室和工厂混合试件中的性能相似，因此实验室配合比设计结果可用于解释现场性能。发现纤维增强AC60/70混合料最为经济。本研究结果可作为指南，用于在泰国及其他采用类似配合比设计的国家制定FR-AC路面的规范。
