摘要
采用控制变量法研究了VAE可再分散乳胶粉掺量对聚合物水泥填缝料(Polymer-Modified Cement Based Composed Joint Sealant,PCJS)拉伸性能的影响规律。将苯丙乳液水泥基路面填缝料中的部分填料替换为VAE乳胶粉制成新型的PCJS,测量了不同VAE乳胶粉掺量下PCJS的拉伸强度、拉伸断裂伸长率、拉伸峰值应变、拉伸模量,观察记录了拉伸破坏形态,分析了温差对PCJS早期拉伸强度性能的影响,研究了苯丙乳液(SAE)和VAE乳胶粉对PCJS的复合改性作用。试验结果表明:30℃温差处理对PCJS早期拉伸强度发展无显著影响。且在28d标准条件下养护完成后,随着VAE乳胶粉掺量增加,PCJS拉伸强度和拉伸模量显著上升,拉伸破坏形态由"内聚破坏"向"粘结破坏"转变,拉伸断裂伸长率和拉伸峰值应变随乳胶粉掺量增加呈先上升后下降趋势,当乳胶粉掺量为2%~3%时,PCJS拉伸变形性能最佳。
This paper studies the law of the effect of the VAE re-dispersible emulsion powder content on the tensile properties of polymer-modified cement based composed joint sealant（PCJS）systematically by single factor test.A new kind of PCJS is produced by adding VAE re-dispersible emulsion powder into styrene-acrylic emulsion based cement compound joint sealant.Under condition of different polymer powdercontent,the tensile strength,early tensile strength,tensile breaking elongation,peak strain and tensile modulus of PCJS are measured respectively.Moreover,the tension failure modes of the PCJS with different content of VAE re-dispersible emulsion powder are recorded and investigated.The effect of different cure condition and emulsion powder content on early tensile strength of PCJS is studied.The composite effect of styrene-acrylic emulsion（SAE）and VAE re-dispersible emulsion powder on the modification of PCJS is studied.The results show that no obvious differences in materials＇early tensile strength emerge at the temperature variation of 30 oC.The tests on specimens with full curing date of 28 days show that as the added proportion of VAE re-dispersible emulsion powder increases,significant growth in both PCJS＇s tensile strength and tensile modulus can be observed.In addition,the tensile failure mode is transformed from cohesive failure to adhesive failure with the increase of polymer powder content.Besides,the tensile deformation capacity of PCJS increases first and then decreases along with the increasing of the VAE redispersible emulsion powder content.Besides,the PCJS can optimize the performance of tensile deformation,as the VAE re-dispersible emulsion powder is added into it by 2%~3%.
作者
杨宁
白二雷
许金余
李为民
张玺
YANG Ning;BAI Erlei;XU Jinyu;LI Weiming;ZHANG Xi(Aeronautical Engineering College,Air Force Engineering University,Xi＇an 710038,China;College of Mechanics and Civil Archietecture,Northwest Polytechnic University,Xi＇an 710072,China;Airport and Barracks Office,Air Force Logistics Department in Southern Military Region,Guangzhou 510052,China;Transport and Barracks Office,Logistics Department of Unit 93199,Harbin 150001,China)
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2018年第4期105-111,共7页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金(51208507
51378497)
关键词
聚合物水泥
苯丙乳液
VAE乳胶粉
填缝料
拉伸性能
polymer-cement composition
SAE
VAE re-dispersible emulsion powder
joint sealant
tensile property
