Wu Bingyang, Han Zhanchuang, Mao Yunbo, Wang Shuai, Zhao Hui, Zhang Shuo, Li Mingchen
School of Transportation, Inner Mongolia University, Hohhot 010031, China.
Department of Civil and Environment Engineering, National University of Singapore, Singapore 117576, Singapore.
Materials (Basel). 2025 Feb 26;18(5):1037. doi: 10.3390/ma18051037.
The double-layer one-time-paving technology for asphalt mixtures enhances the interlayer adhesion and stability of pavement by simultaneously laying and compacting two layers of asphalt mixture, demonstrating improvements over traditional layer-by-layer paving and compaction methods. Based on this technology, the effects of paving techniques, mixture types, and structural layer thickness on the low-temperature crack resistance of pavement at -10 °C were investigated. Results indicated that, compared to traditional paving methods, the maximum tensile strain and bending strain energy density of pavement using the double-layer one-time-paving technique increased by at least 14% and 20%, respectively, under a 95% confidence level. Compared to the AC-13 + AC-25 mixture combination, the AC-16 + AC-20, AC-16 + AC-25, and AC-13 + AC-20 combinations showed increases in maximum tensile strain by at least 25%, 15%, and 15%, and in bending strain energy density by at least 57%, 38%, and 31%, respectively. Compared to the 5 cm + 5 cm thickness combination, the 4 cm + 6 cm and 3 cm + 7 cm combinations exhibited increases in maximum tensile strain by at least 14% and 22%, and in bending strain energy density by at least 16% and 29%, respectively. To effectively improve the low-temperature crack resistance of asphalt pavement at -10 °C, it is recommended to adopt a double-layer one-time-paving structure with a 3 cm AC-16 upper layer and a 7 cm AC-20 lower layer, providing insights for more durable asphalt pavements in cold climates.
沥青混合料双层一次性摊铺技术通过同时摊铺和压实两层沥青混合料，增强了路面的层间粘结力和稳定性，相较于传统的分层摊铺和压实方法有显著改进。基于该技术，研究了摊铺工艺、混合料类型和结构层厚度对-10℃时路面低温抗裂性能的影响。结果表明，在95%置信水平下，与传统摊铺方法相比，采用双层一次性摊铺技术的路面最大拉应变和弯曲应变能密度分别至少提高了14%和20%。与AC-13+AC-25混合料组合相比，AC-16+AC-20、AC-16+AC-25和AC-13+AC-20组合的最大拉应变分别至少提高了25%、15%和15%，弯曲应变能密度分别至少提高了57%、38%和31%。与5cm+5cm厚度组合相比，4cm+6cm和3cm+7cm组合的最大拉应变分别至少提高了14%和22%，弯曲应变能密度分别至少提高了16%和29%。为有效提高-10℃时沥青路面的低温抗裂性能，建议采用上层3cm AC-16、下层7cm AC-20的双层一次性摊铺结构，为寒冷气候下更耐用的沥青路面提供了思路。
