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材料导报  2022, Vol. 36 Issue (16): 21110128-7    https://doi.org/10.11896/cldb.21110128
  低碳生态路面材料 |
冻融循环作用下乳化沥青冷再生混合料空隙特性
杨彦海1, 王汉彬1, 杨野1,2,*
1 沈阳建筑大学交通工程学院, 沈阳 110168
2 大连海事大学交通运输工程学院,辽宁 大连 116026
Characterization of Air Voids in Cold Recycled Mixtures with Emulsified Asphalt Under Freeze-Thaw Cycles
YANG Yanhai1, WANG Hanbin1, YANG Ye1,2,*
1 School of Transportation Engineering, Shenyang Jianzhu University, Shenyang 110168, China
2 College of Transportation Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China
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摘要 为探究冻融作用下乳化沥青冷再生混合料的空隙特性变化规律、揭示混合料内部空隙演化行为,基于工业CT和数字图像处理技术,本工作对干燥与真空饱水状态下乳化沥青冷再生混合料经历0次、10次、20次冻融循环作用下的空隙率、空隙体积(Volume3d)、等效直径(EqDiameter)、形状因子(Shape-3d)等参数进行研究。结果表明,冻融循环作用后,干燥和真空饱水试件空隙率均增长,且饱水试件空隙率增加幅度显著大于干燥试件;干燥试件的空隙体积与数量均随冻融循环次数的增加而增大,说明冻融循环作用下干燥试件主要表现为新空隙产生和空隙扩大,空隙连通较少;真空饱水试件的小型、中型空隙数量随冻融循环次数的增加先增大后减小,而空隙平均体积和大型空隙的数量均只随冻融循环次数的增加而增大,说明冻融循环作用下真空饱水试件空隙表现为新空隙产生、空隙扩大和空隙连通;冻融循环作用下,空隙的形状因子均发生小幅变化,说明空隙的区域形态基本保持不变。冻融循环作用使乳化沥青冷再生混合料内部空隙发生改变,水相变产生的冻胀力使空隙显著变化,导致混合料损伤加剧。
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杨彦海
王汉彬
杨野
关键词:  道路工程  乳化沥青冷再生混合料  冻融作用  空隙特性演化规律  工业CT    
Abstract: In order to explore the change law of void characteristics of emulsified asphalt cold recycled mixtures under freeze-thaw and reveal the evolution behavior of voids in the mixture, based on industrial CT and digital image processing technology, the air voids, void volume (Volume3d), equivalent diameter (EqDiameter), shape factor (Shape-3d) and other parameters were studied on dry and vacuum saturated specimens of emulsified asphalt cold recycled mixtures subjected to 0, 10, 20 freeze-thaw cycles. The results show that the air voids of dry and vacuum saturated specimens increases, and the increase range of air voids of water saturated specimens is significantly higher than that of dry specimens after freeze-thaw cycle. The volume and quantity of voids in dry specimens increase with the increase of the number of freeze-thaw cycles, indicating that the dry specimens are mainly characterized by the generation of new voids and void expansion, and voids connection is less under freeze-thaw cycles. The number of small and medium voids in vacuum saturated specimens first increases and then decreases with the increase of the number of freeze-thaw cycles, while the average volume of voids and the number of large voids only increase with the increase of the number of freeze-thaw cycles, indicating that the voids of vacuum saturated specimens are mainly characterized by the gene-ration of new voids, voids expansion and voids connection under freeze-thaw cycles. The shape factors of voids change slightly, indicating that the regional shape of voids remains basically unchanged under freeze-thaw cycle. The freeze-thaw cycle changes the internal voids of emulsified asphalt cold recycled mixtures, and the frost heaving force produced by water phase change significantly changes the voids, resulting in the aggravation of mixture damage.
Key words:  road engineering    emulsified asphalt cold recycled mixtures    freeze-thaw    evolution law of void characteristics    industrial CT
出版日期:  2022-08-25      发布日期:  2022-08-29
ZTFLH:  U414  
基金资助: 辽宁省特聘教授项目(tpjs2017003);辽宁省自然科学基金指导项目(201602631)
通讯作者:  *yangye@sjzu.edu.cn   
作者简介:  杨彦海,沈阳建筑大学交通工程学院教授、博士后合作导师。1998年东北林业大学交通土建工程专业本科毕业后到辽宁省交通科学研究院工作,2004年沈阳建筑大学材料学专业硕士毕业,2007年东北大学工程力学专业博士毕业,2011年到沈阳建筑大学工作至今。目前主要从事新型路面材料及路面结构,道路病害诊断、路面养护与决策技术,废旧资源循环再利用,道路基础设施智能仿真、建造与监测等方面的研究。在国内外核心以上期刊发表学术论文80余篇。编写辽宁省地方标准等6部,著作4部。授权专利10项。杨野,沈阳建筑大学交通工程学院实验师,2013年沈阳建筑大学土木工程专业本科毕业,2016年沈阳建筑大学道路与铁道工程专业硕士毕业,2017年到沈阳建筑大学工作至今,2018年在大连海事大学道路与铁道工程专业攻读博士研究生。主要从事新型路面材料与路面结构、道路施工与养护技术、公路固体废弃物资源循环再利用等方面的研究。以第一作者和通讯作者发表核心以上学术论文7篇,参编著作4部,参与发表中文核心以上学术论文18篇,参与授权专利11项。
引用本文:    
杨彦海, 王汉彬, 杨野. 冻融循环作用下乳化沥青冷再生混合料空隙特性[J]. 材料导报, 2022, 36(16): 21110128-7.
YANG Yanhai, WANG Hanbin, YANG Ye. Characterization of Air Voids in Cold Recycled Mixtures with Emulsified Asphalt Under Freeze-Thaw Cycles. Materials Reports, 2022, 36(16): 21110128-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21110128  或          http://www.mater-rep.com/CN/Y2022/V36/I16/21110128
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