摘要
研究了水泥混凝土桥面铺装层间黏结性能随温度的变化规律,同时探究了黏结层的温度性能以及直剪与斜剪剪切强度之间的关系.对比分析了4种涂膜黏结层(SBS改性沥青、WTR改性沥青、WTR/APAO改性沥青、AMP-100二阶反应型黏结涂料)和3种改性沥青碎石黏结层(SBS改性沥青碎石、WTR改性沥青碎石、WTR/APAO改性沥青碎石)的拉拔及剪切强度差异.采用回归分析法获得层间强度随温度的变化规律;计算不同温度下层间强度与常温(20℃)下层间强度的比值,用于黏结层剪切强度和拉拔强度的温度敏感性对比分析;分析不同温度下斜剪强度与直剪强度的比值关系.结果表明:层间拉拔强度、层间剪切强度与温度均满足单指数函数关系,拟合优度R2达0.970以上. WTR/APAO改性沥青黏结层及WTR/APAO改性沥青碎石黏结层力学性能优良,在不同温度下的拉拔和剪切强度值均高于同类型黏结层. AMP-100黏结层拉拔和剪切强度对温度的敏感性最低.建立了20~45℃的层间强度比值表,用于层间强度预估.斜剪强度显著高于直剪强度,同时斜剪强度对温度的敏感性低于直剪强度,当温度处于20~45℃时,斜剪强度与直剪强度比值范围为1.165~2.990.
The variation of bonding performance between pavement layers of cement concrete bridge decks with temperature was studied,and the relationship between the temperature properties of the bonding layer and the shear strength of straight shear and oblique shear was explored.The differences in pulling and shear strength of four coating adhesive layers(SBS modified asphalt,WTR modified asphalt,WTR/APAO modified asphalt,AMP-100 secondorder reactive adhesive coating)and three modified asphalt crushed stone bonding layers(SBS modified asphalt crushed stone,WTR modified asphalt crushed stone,WTR/APAO modified asphalt crushed stone)were compared and analyzed.Regression analysis was used to obtain the variation law of interlayer intensity with temperature.The study calculated the ratio of the strength between the lower layers and the strength between the lower layers at normal temperature(20℃),which was used for the comparative analysis of the temperature sensitivity of the shear strength and the pull strength of the bonding layer;The ratio of oblique shear strength to straight shear strength at different temperatures was also analyzed.The results show that the pull strength between layers,shear strength,and tempera⁃ture between layers all meet the relationship of a single exponential function,with a goodness of fit R2 above 0.970.The WTR/APAO modified bitumen bond layer and WTR/APAO modified asphalt crushed stone bond layer have ex⁃cellent mechanical properties,with higher pull and shear strength values at different temperatures than those of the same type of bonding layer.The pulling and shear strength of the AMP-100 bond layer is the least sensitive to tem⁃perature.An interlayer strength ratio table of 20~40℃was established for interlayer strength estimation.The oblique shear strength is significantly higher than the straight shear strength,and the sensitivity of the oblique shear strength to temperature is lower than that of the straight shear strength.At temperatures ranging from 20℃to 45℃,the ratio of obl
作者
颜可珍
黄顺欣
葛冬冬
洪哲
YAN Kezhen;HUANG Shunxin;GE Dongdong;HONG Zhe(College of Civil Engineering,Hunan University,Changsha 410082,China;School of Transportation Engineering,Changsha University of Science&Technology,Changsha 410004,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第7期23-32,共10页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51778224)。
关键词
黏结性能
黏结层
温度
拉拔强度
剪切强度
bonding performance
adhesive layer
temperature
pull strength
shear strength
