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1、第19卷第4期建筑材料學(xué)報Vo1.19.No.42016年8月JOURNALOFBUILDINGMATERIALSAug.,2O16文章編號:1007-9629(2016)04—0752—06氯鹽干濕循環(huán)下纖維編織網(wǎng)增強(qiáng)混凝土力學(xué)性能尹世平,王波,強(qiáng)東峰,王玄玄?!?1.中國礦業(yè)大學(xué)深部巖土力學(xué)與地下工程國家重點實驗室,江蘇徐州221116;2.中國礦業(yè)大學(xué)江蘇省土木工程環(huán)境災(zāi)變與結(jié)構(gòu)可靠性重點實驗室,江蘇徐州221116;3.中國礦業(yè)大學(xué)力學(xué)與建筑工程學(xué)院,江蘇徐州221I16)摘要:通過拉拔和四點彎曲試驗研究了氯鹽(NaC1)溶液作用下干濕循環(huán)次數(shù)、氯鹽溶液濃度(質(zhì)量分
2、數(shù))和短切纖維種類對纖維編織網(wǎng)增強(qiáng)混凝土(TRC)性能的影響.結(jié)果表明:在濃度為5.0A0的氯鹽溶液作用下,隨著干濕循環(huán)次數(shù)的增加,TRC中纖維束與混凝土的界面性能呈現(xiàn)下降趨勢,而TRC的抗彎強(qiáng)度有先提高后降低的趨勢;在120次干濕循環(huán)作用下,隨著氯鹽溶液濃度的增加,纖維束與混凝土的界面黏結(jié)強(qiáng)度變化不大,而TRC的抗彎強(qiáng)度也呈現(xiàn)先升高后降低的趨勢.摻加短切AR-glass纖維和PVA纖維均可提高纖維束與混凝土的界面性能及TRC的抗彎性能,且后者對TRC抗彎承載力的提高更為明顯.關(guān)鍵詞:纖維編織網(wǎng)增強(qiáng)混凝土;氯鹽干濕循環(huán);界面性能;抗彎強(qiáng)度中圖分類號:TQ528.582文獻(xiàn)標(biāo)
3、志碼:Adoi:10.3969/j.issn.1007-9629.2016.04.025MechanicalPerformanceofTextileReinforcedConcreteunderChlorideSaltDry—WetCycleyINShiping’。“,WANGBo,QIANGDongfeng”,WANGXuanxuan,(1.StateKeyLaboratoryforGeomeehanics&DeepUndergroundEngineering,ChinaUniversityofMiningandTechnology,Xuzhou221116,China;
4、2.JiangsuKeyLaboratoryofEnvironmentalImpactandStructuralSafetyinEngineering,ChinaUniversityofMiningandTechnology,Xuzhou221116,China;3.SchoolofMechanics&CivilEngineering,ChinaUniversityofMiningandTechnology,Xuzhou221116,China)Abstract:Bythepullouttestandfour-pointbendingtest,theinfluenceoft
5、henumberofdry—wetcycles,theconcentration(massfraction)ofchloridesolutionandthetypesofshortfibersontheperformanceoftextilereinforcedconcrete(TRC)wasstudiedundertheactionofsodiumchloridesolution.Theresultsshowthatunder59/5concentrationofchloridesolution,withtheincreaseofthenumberofdry-wetcyc
6、les,theinterracialpropertybetweenyarnsandconcreteinTRCpresentsadownwardtrendandthebendingstrengthofTRCincreasesfirstandthendecreases;under120timesofdry-wetcycles,withtheincreaseoftheconcentrationofchloridesolution,theinterfacialstrengthbetweenyarnsandconcreteinTRCchangesalittleandthebendin
7、gstrengthofTRCalsoincreasesfirstandthendecreases.AddingbothAR—glassandPVAshortfiberscouldimprovetheinterracialpropertybetweenyarnsandconcreteinTRCandtheben—dingpropertyofTRC,andthelatterhasbetterimprovementontheflexuralbearingcapacityofTRC.Keywords:textilerein