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
周岚1
作者信息
- 1. 南京道润交通科技有限公司,江苏 南京 210000
- 折叠
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.
Abstract
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 as-phalt cold recycled mixture under different stress ratios was thoroughly explored.The study found that the cement dosage has a signifi-cant 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 as-phalt coldrecycledmixture exhibits better anti-fatigue performance under lowstress ratios(<0.35),while its anti-fatigue perform-ance 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Key words
road engineering/emulsified asphalt/cold recycled mixture/fatigue performance/SCB fatigue test引用本文复制引用
出版年
2024
NETL
NSTL
万方数据