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《SAP对高延性水泥基复合材料弯曲性能的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第31卷第2期深圳大学学报理工版Vo1.3lNo.22014年3月JOURNAL0FSHENZHENUNIVERSITYSCIENCEANDENGINEERINGMar.2O14【土木建筑工程/ArchitectureandCivilEngineering】SAP对高延性水泥基复合材料弯曲性能的影响祝瑜,杨英姿,姚燕,管学茂1)河南理工大学材料科学与工程学院,河南焦作454003;2)哈尔滨工业大学土木工程学院,哈尔滨150001摘要:为了考察超级吸水颗粒(superabsorbentpolymerparticles,SAP)对高延性水泥基复合材料(engineered
2、cementitiouscomposites,ECC)性能的影响,研究了SAP的质量分数分别为0、0.2%和0.4%时,6组水泥基复合材料的抗弯性能、抗压强度、抗折强度及裂缝分布特点.结果表明,水泥基复合材料的28d挠度都不低于10mm;SAP的质量分数越高,ECC的挠度越大.粉煤灰的质量分数为70%时,水泥基复合材料的28d挠度超过了25mm.SAP的质量分数越多,抗压强度和抗折强度都有不同程度的减小.但其后期强度增加较快.此外,ECC的弯曲变形能力与金属相似;在基体中引入SAP颗粒,能够增加裂缝数量,减小裂缝宽度和裂缝间距.关键词:工程材料;高延性水泥基复合材料;P
3、VA纤维;超级吸水颗粒;粉煤灰;韧性中图分类号:TQ177.68文献标志码:Adoi:10.3724/SP.J.1249.2014.02193Effectofsuperabs0rbentpolymerparticlesontheflexuralpropertiesofengineeredcementitiouscompositesZhuYu,YangYingzi,YaoYan,andGuanXuemao1)SchoolofMaterialsScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo454003,Hen
4、anProvince,P.R.China2)SchoolofCivilEngineering,HarbinInstituteofTechnology,Harbin150001,P.R.ChinaAbstract:Theinfluenceofsuperabsorbentpolymer(SAP)particlesonthemechanicalpropertiesofengineeredce.mentitiouscomposites(ECC)isinvestigatedbyemployingthefour-pointbendingtest.compressivestrengt
5、handflexuralstrength.SixdifferentECCmixproportionsareapplied,andthereplacementlevelsofflyashare50%and70%,andSAPcontentsare0,0.2%and0.4%ofbindermaterials.respectively.Theresultsshowthatthedeflec—tionofECConDay28iSnotlessthan10mm.ThedeflectionofECCbecomeslargerwiththeincreaseofthecontentof
6、SAP.Especially,whenthereplacementlevelofflyashis70%,thedeflectionofECCon28daysis25mm,theincreaseofSAPwillresultindecreaseofthecompressivestrengthandflexuralstrengthofECConDay28.andobviousincreaseofthecompressivestrengthafterDay28.TheductilityofECCissimilartothatofmeta1.Incorpora—tingSAPi
7、ntomatrixcanincreasethecracknumberandreducethecrackwidthandcrackdistance.Keywords:engineeringmaterial;engineeredcementitiouscomposites;pdyvinylalcoholfiber;superabsorbentpoly.trierparticles;flyash;ductilityReceived:20l3‘10-09:Accepted:2014—02—18Foundation:NationalNaturalS
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