不同环境下酸性闪长岩沥青混合料长期水稳性能评价研究
Evaluation of Long-Term Water Stability of Acidic Diorite Asphalt Mixtures in Different Environments
曹忠露 1陈平 2刘学文 2谭波2
作者信息
- 1. 中交天津港湾工程研究院有限公司,天津市 300222
- 2. 桂林理工大学 广西建筑新能源与节能重点实验室,广西 桂林 541004
- 折叠
摘要
通过浸水马歇尔试验、冻融劈裂试验以及车辙试验评价了采用酸碱复合集料、单掺水泥(2%水泥替代矿粉)、消石灰(30%消石灰水浸泡石料)以及抗剥落剂(0.3%抗剥落剂改性沥青)的酸性闪长岩沥青混合料的短期水稳性能,再通过反复冻融劈裂试验、反复冻融烘劈裂试验以及反复酸蚀冻融劈裂试验测试处置酸性闪长岩沥青混合料在不同环境下的长期水稳性能.结果表明:酸性闪长岩的物理力学性能均满足规范要求;处置后酸性闪长岩沥青混合料的短期水稳性能显著提升,满足规范使用要求;但经0.2%抗剥落剂处置的酸性闪长岩沥青混合料在高温下的长期水稳性能较差;经30%消石灰水处置的酸性闪长岩沥青混合料具有良好的长期水稳性能,可推荐应用于工程中.
Abstract
The short-term water stability of acidic diorite asphalt mixtures with acid-alkaline composite aggregates mixed with cement(2%cement instead of mineral powder),slaked lime(30%slaked lime water for stone immersion),and anti-spalling agent(modified asphalt with 0.3%anti-spalling agent)was evaluated by Marshall test of immersion,freeze-thaw splitting test,and rutting test.Then,by repeated freeze-thaw splitting test,repeated freeze-thaw and baking splitting test,and repeated acid-etching freeze-thaw splitting test,the long-term water stability of the treated acidic diorite asphalt mixtures in different environments was tested.The results show that the physical and mechanical properties of acidic diorite meet the specification requirements;the short-term water stability of the treated acidic diorite asphalt mixtures is significantly improved and meets the specification requirements.However,the long-term water stability of the acidic diorite asphalt mixtures treated with 0.2%anti-spalling agent is poor at high temperatures.The acidic diorite asphalt mixtures treated with 30%slaked lime water have good long-term water stability and can be recommended for engineering applications.
关键词
沥青混合料/酸性闪长岩/冻融、冻融烘/酸蚀冻融/水稳性能Key words
asphalt mixture/acid diorite/freeze-thaw/freeze-thaw and baking/acid-etching引用本文复制引用
基金项目
国家自然科学基金资助项目(52062009)
出版年
2024
国家科技期刊平台
NSTL
万方数据