基于防水粘结层附着力的桥面铺装层间粘结强度和抗剪强度预测  

Prediction of interlayer bond strength and shear strength of bridge deck pavement based on the adhesion of waterproof bond layer

作　　者：刘明龙 LIU Minglong(CRCC Chongqing Investment Group Co.Ltd.,Chongqing 401122,China)

机构地区：[1]中铁建重庆投资集团有限公司,重庆401122

出　　处：《新型建筑材料》2024年第2期122-127,共6页New Building Materials

基　　金：中铁建重庆投资集团有限公司科技研发项目(CQTZ-KX02-2022-02)。

摘　　要：针对目前水泥混凝土复合式桥面铺装层间结合效果有损评价方法存在的弊端,通过室内试验建立特定桥面铺装结构和材料条件下组合结构的层间粘结强度和层间剪切强度与附着力之间的函数关系,同时求得温度修正系数;根据测得的工程现场防水粘结层的附着力计算得到组合结构的层间粘结强度和抗剪强度,进而换算成20℃条件下的强度标准值;并参照相关规范对实际工程层间结合效果进行质量评定。结果表明,防水粘结层对水泥混凝土的附着力与组合结构的层间粘结强度及抗剪强度存在较强的线性正相关,且强度预测值与实测值的误差基本都在10%以内;强度预测值换算成标准值后可直接借助规范进行层间结合效果评价。Aiming at the disadvantages of the current evaluation method of the damage of interlayer bonding effect of cement concrete composite bridge pavement,the functional relations between interlayer bond strength and shear strength and adhesion of composite structure under specific bridge pavement structure and material conditions are established by laboratory tests,and the temperature correction coefficient is obtained in this paper.The interlayer bond strength and shear strength of the composite structure are calculated according to the measured adhesion of the waterproof bond layer on the project site,and then converted to the standard strength value at 20 ℃.The quality evaluation of the actual engineering interlayer combination effect is carried out with reference to the relevant standards.The results show that there is a strong linear positive correlation between the adhesion of waterproof bonding layer to cement concrete and the interlayer bonding strength and shear strength of composite structure,and the error between the predicted value and the measured value is basically within 10%.The interlayer bonding effect can be evaluated directly with the help of the specification after the predicted strength value is converted to the standard value.

关 键 词：附着力 桥面铺装 防水粘结层 粘结强度 抗剪强度 预测 

分 类 号：TU57[建筑科学—建筑技术科学]