寒区机场刚性道面薄层修补材料性能试验分析  

Experimental analysis on the performance of thin-layer repair material for airport rigid pavement in cold area

作　　者：冯莉 刘国光[1] 杨跃敏 FENG Li;LIU Guoguang;YANG Yuemin(College of Transportation Science and Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学交通科学与工程学院,天津300300

出　　处：《新型建筑材料》2021年第9期74-79,84,共7页New Building Materials

基　　金：国家重点研发项目(2020YFB1600100);天津市教委科研项目(2018KJ243)。

摘　　要：选取了2类新型道面快速修补料,测试了不同厚度(6、12、18、24、30 mm)薄层修补试件在-15℃低温养护环境下的水化反应温度变化曲线,研究了修补厚度和回弹冲击强度对薄层破坏的影响及规律,分析了薄层修补失效的破坏特征演变。结果表明,尽管低温抑制快速修补材料水化作用,材料B仍表现出初始水化反应剧烈、入模温度较高、有效水化反应时间较长等优点;在冻融循环和冲击荷载作用下,修补层破坏特征随着修补厚度增加由强度破坏演变为粘接能力失效而整体脱落;为保证修补层与原道面变形协调一致以及充分发挥材料自身强度和界面强度,建议超薄层修补时材料B修补厚度不超过4 mm。Two types of new road surface quick repair materials were selected,and the hydration reaction temperature change curve of different thickness(6,12,18,24,30 mm)thin-layer repair specimens under-15℃low-temperature curing environment were measured through comparative experiments.The influence and laws of repair thickness and rebound impact strength on thin layer damage were investigated and the development of the damage characteristics of the thin-layer repairing failure were analyzed.The results show that although low temperature will inhibit the hydration reaction of the rapid repairing material,material B still exhibits the advantages of severer initial hydration reaction,higher mold temperature,and longer effective hydration reaction time.Under the effects of freeze-thaw cycles and impact loads,the damage characteristics of the repair layer evolve from strength failure to failure of bonding ability with the whole falls off as the thickness of the repair increases.In order to ensure the coordinated deformation and consistency between the repair layer and the original pavement surface,and to make interface strength and the strength of material itself work at full capacity,it is recommended that the repair thickness of material B does not exceed 4 mm when using the ultra-thin layer repair method.

关 键 词：薄层修补材料 刚性道面 寒区机场 抗冻性能 

分 类 号：TU58[建筑科学—建筑技术科学]