乳化沥青冷再生混合料疲劳性能分析  

Fatigue Performance Analysis of Emulsified Asphalt Cold Recycled Mixture

作　　者：周岚 ZHOU Lan(Nanjing Daorun Transportation Technology Co.,Ltd.,Nanjing,Jiangsu 210000,China)

机构地区：[1]南京道润交通科技有限公司,江苏南京210000

出　　处：《黑龙江交通科技》2024年第7期44-47,共4页Communications Science and Technology Heilongjiang

摘　　要：为了研究乳化沥青冷再生混合料的疲劳性能,采用半圆弯曲疲劳试验,以乳化沥青混合料CIR-20试件为对象,深入探讨了不同应力比条件下乳化沥青冷再生混合料的抗疲劳性能。研究发现,水泥用量对再生混合料疲劳性能具有显著影响。添加1.5%的水泥能增强乳化沥青冷再生混合料的抗裂强度。在同等应力条件下,水泥的添加对乳化沥青冷再生混合料的疲劳性能产生负面影响,导致疲劳寿命的减少。相对于热拌沥青混合料,在低应力比(<0.35)下,乳化沥青冷再生混合料的抗疲劳性能优于普通热拌沥青混合料;而在高应力比(≥0.35)条件下,其抗疲劳性能则相对较差。To investigate the fatigue performance of emulsified asphalt cold recycled mixture,the semi-circular bending fatigue test(SCB fatigue test)was conducted on CIR-20 emulsified asphalt mixture specimens.The anti-fatigue performance of emulsified asphalt cold recycled mixture under different stress ratios was thoroughly explored.The study found that the cement dosage has a significant impact on the fatigue performance of the recycled mixture.Adding 1.5%cement can enhance the crack resistance of emulsified asphalt cold recycled mixture.Under the same stress condition,the addition of cement has a negative impact on the fatigue performance of emulsified asphalt cold recycled mixture,leading to a reduction in fatigue life.Compared to hot mix asphalt mixture,emulsified asphalt cold recycled mixture exhibits better anti-fatigue performance under low stress ratios(<0.35),while its anti-fatigue performance is relatively poorer under high stress ratios(≥0.35).

关 键 词：道路工程 乳化沥青 冷再生混合料 疲劳性能 半圆弯曲疲劳试验 

分 类 号：U416.217[交通运输工程—道路与铁道工程]