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1、第31卷第2期深圳大學(xué)學(xué)報(bào)理工版Vo1.3lNo.22014年3月JOURNAL0FSHENZHENUNIVERSITYSCIENCEANDENGINEERINGMar.2O14【土木建筑工程/ArchitectureandCivilEngineering】SAP對(duì)高延性水泥基復(fù)合材料彎曲性能的影響祝瑜,楊英姿,姚燕,管學(xué)茂1)河南理工大學(xué)材料科學(xué)與工程學(xué)院,河南焦作454003;2)哈爾濱工業(yè)大學(xué)土木工程學(xué)院,哈爾濱150001摘要:為了考察超級(jí)吸水顆粒(superabsorbentpolymerparticles,SAP)對(duì)高延性水泥基復(fù)合材料(engineered
2、cementitiouscomposites,ECC)性能的影響,研究了SAP的質(zhì)量分?jǐn)?shù)分別為0、0.2%和0.4%時(shí),6組水泥基復(fù)合材料的抗彎性能、抗壓強(qiáng)度、抗折強(qiáng)度及裂縫分布特點(diǎn).結(jié)果表明,水泥基復(fù)合材料的28d撓度都不低于10mm;SAP的質(zhì)量分?jǐn)?shù)越高,ECC的撓度越大.粉煤灰的質(zhì)量分?jǐn)?shù)為70%時(shí),水泥基復(fù)合材料的28d撓度超過(guò)了25mm.SAP的質(zhì)量分?jǐn)?shù)越多,抗壓強(qiáng)度和抗折強(qiáng)度都有不同程度的減?。浜笃趶?qiáng)度增加較快.此外,ECC的彎曲變形能力與金屬相似;在基體中引入SAP顆粒,能夠增加裂縫數(shù)量,減小裂縫寬度和裂縫間距.關(guān)鍵詞:工程材料;高延性水泥基復(fù)合材料;P
3、VA纖維;超級(jí)吸水顆粒;粉煤灰;韌性中圖分類(lèi)號(hào):TQ177.68文獻(xiàn)標(biāo)志碼: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.a(chǎn)ndobviousincreaseofthecompressivestrengthafterDay28.TheductilityofECCissimilartothatofmeta1.Incorpora—tingSAPi
7、ntomatrixcanincreasethecracknumberandreducethecrackwidthandcrackdistance.Keywords:engineeringmaterial;engineeredcementitiouscomposites;pdyvinylalcoholfiber;superabsorbentpoly.trierparticles;flyash;ductilityReceived:20l3‘10-09:Accepted:2014—02—18Foundation:NationalNaturalS