摘要
以冻融循环试验为基础,研究蓄盐类沥青混合料长期性能变化规律。结合冻融损伤原理和Logistic模型,评价掺不同类型蓄盐材料沥青混合料在冻融循环下的衰变特性。结果表明:掺加蓄盐材料对沥青混合料的高温性能影响不大,但是会降低沥青混合料的低温抗裂性;随冻融循环次数增加,基质沥青混合料和掺粉末状蓄盐材料a、b沥青混合料的空隙率呈上升趋势,基质沥青混合料和掺粉末状蓄盐材料a沥青混合料的冻融劈裂强度比整体呈下降趋势,而掺颗粒状蓄盐材料c沥青混合料的空隙率整体先增大后逐渐趋于稳定。Logistic模型能较好地反应冻融损伤变量的变化规律。
Based on the freeze-thaw cycle test,the long-term performance change law of salt storage asphalt mixture was studied.Combined with the principle of freeze-thaw damage and Logistic model,the decay characteristics of asphalt mixture with different types of salt storage materials under freeze-thaw cycles were evaluated.The results show that the salt storage material has little effect on the high temperature performance of the asphalt mixture,but it will reduce the low temperature crack resistance of the mixture.With the increase of freeze-thaw cycles,the porosity of matrix asphalt mixture and powdered salt storage material a and b asphalt mixture shows an upward trend,while the freeze-thaw splitting strength ratio of matrix asphalt mixture and powdered salt storage material a asphalt mixture shows an overall downward trend.However,the porosity of granular salt storage material c asphalt mixture first increases and then tends to be gentle.The Logistic model can better reflect the change rule of freeze-thaw damage variables.
作者
徐冰倩
王虎
史婧菲
仲小玲
XU Bingqian;WANG Hu;SHI Jingfei;ZHONG Xiaoling(Xinjiang Agricultural University College of Transportation and Logistics Engineering,Urumqi 830000,China;Xinjiang Highway Bridge Testing&Testing Center Co.Ltd.,Urumqi 830052,China)
出处
《新型建筑材料》
2024年第10期57-61,68,共6页
New Building Materials
基金
2022自治区自然基金面上项目(2022D01A78)
新疆农业大学交通运输工程校级重点学科开放课题(XJAUTE2022K05)。
关键词
蓄盐类沥青混合料
水稳定性
损伤模型
冻融循环
the asphalt mixture include salt
water stability
damage model
freeze-thaw cycle
