【摘要】 为提高旧墙翻新瓷砖界面剂的性能,分别对掺入四种聚合物(PTB、EVA、VAE及SAE)的界面剂进行对比,测试了其黏结性能(含冻融和风振)、压折比、吸水率和微观结构特征,并结合XRD、FTIR、压汞法(MIP)、SEM试验及孔隙、裂纹分析系统(PCAS)进行机理分析。结果表明:掺入聚合物改性后,增大了界面剂黏结强度(含冻融和风振),减小了界面剂压折比和吸水率。在P/W(聚合物与外加水体积比)为1:1时,黏结强度(含冻融和风振)排序均为PTBJ(表示PTB界面剂)>VAEJ>SAEJ>EVAJ,压折比排序为SAEJ>VAEJ>EVAJ>PTBJ,吸水率排序为SAEJ>EVAJ>VAEJ>PTBJ。PTBJ呈现更为复杂致密的、不完全连续的空间骨架-基体网状结构体系,具有更高的黏结强度以及较小的压折比和吸水率。本研究可为城市更新中旧墙瓷砖面翻新工程提供理论和试验基础。更多还原

【Abstract】 To enhance the interfacial performance of renovation agents for old wall tiles,four polymer-modified formulations(PTB,EVA,VAE,and SAE) were evaluated.Systematic assessments of bond strength(including freeze-thaw and wind vibration),compressive-flexural ratio,water absorption,and microstructural characteristics were conducted through XRD,FTIR,mercury intrusion porosimetry(MIP),SEM,and pore and crack analysis system(PCAS) analyses.Results demonstrated that polymer modification significantly improved interfacial bond strength while reducing compressive-flexural ratio and water absorption.When the volume ratio of polymer to external water is 1:1,the order of bond strength(including freeze-thaw and wind vibration) is PTBJ(representing PTB interface agent)>VAEJ>SAEJ>EVAJ.The order of compressive-flexural ratio is SAEJ>VAEJ>EVAJ>PTBJ.And the order of water absorption is SAEJ>EVAJ>VAEJ>PTBJ.PTBJ exhibits a more complex and dense,yet incomplete,continuous spatial network structure,resulting in enhanced bond strength and reduced compressive-flexural ratio and water absorption.This study provides a theoretical and experimental foundation for optimizing polymer-modified interface agents in urban renewal projects that involve aged ceramic tile surfaces.更多还原