温拌LDHs改性沥青混合料抗紫外老化性能及应用研究
Anti-ultraviolet aging performance and application of warm-mix asphalt mixtures containing layered double hydroxides additives
卢忠明 1米轶轩 2吴少鹏 3蒋永庆 1黄文嗣 1王志 2周宇恒3
作者信息
- 1. 四川久马高速公路有限责任公司,四川阿坝藏族羌族自治州 610000
- 2. 北京新桥技术发展有限公司,北京 100089
- 3. 武汉理工大学材料科学与工程学院,湖北 武汉 430070
- 折叠
摘要
采用层状双金属氢氧化物(LDHs)作为抗紫外添加剂,温拌剂作为降黏添加剂,制备了一种新型抗紫外沥青混合料.通过透射电子显微镜研究了LDHs的晶体稳定性,同时通过黏度试验研究了温拌剂的降黏效果,再通过物理性能试验、车辙试验、水稳定性试验研究了LDHs的最佳掺量及温拌LDHs改性沥青混合料的抗紫外老化性能,最后铺筑温拌LDHs改性沥青混合料试验段,对试验路用性能进行评价.结果表明:在170℃下,LDHs具有良好的晶体稳定性,温拌剂能显著降低LDHs改性沥青的黏度,LDHs能够有效提高温拌沥青混合料的抗紫外性能和力学性能,推荐实体工程中掺加LDHs质量与沥青质量之比为0.03.
Abstract
A new anti-ultraviolet(UV)asphalt mixture using layered double hydroxides(LDHs)as UV-resistant additives and warm-mix agents as viscosity-reducing additives was prepared.The stability of LDHs crystals was investigated by transmission electron microscopy.Simultaneously,viscosity tests were conducted to investigate the viscosity-reducing effect of the warm-mix agents.Subsequently,physical performance test,wheel rutting test,and moisture damage resistance performance test were conducted to investigate the optimal content of LDHs and the anti-UV aging performance of warm-mix asphalt mixtures containing LDHs additives.Finally,a test road with warm-mix asphalt mixtures containing LDHs additives was constructed,and the pavement performances of the test road was investigated.The results indicate that LDHs have excellent crystal structure stability at 170℃.The warm-mix agents significantly reduce the viscosity of the LDHs modified asphalt.LDHs effectively improve the anti-UV aging performance and mechanical performance of the warm-mix asphalt mixtures.The recommended mass ratio of LDHs to asphalt binder for engineering is 0.03.
关键词
改性沥青:沥青混合料:层状双金属氢氧化物/温拌剂/老化性能Key words
modified asphalt/asphalt mixtures/layered double hydroxides/warm-mix agent/aging characteristic引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据