- 喬 治1,張 磊1,2,王志杰3,楊久俊1,2
2017年第10期
摘要
引用本文
摘??要:通過分析陽極極化電位-時間曲線、Cl-固結能力、水泥凈漿的pH值來研究煅燒水滑石(CLDH)對海水海砂混凝土護筋性的影響,并與礦渣和粉煤灰進行比較。此外,還研究了煅燒水滑石對海水海砂混凝土力學性能的影響。結果表明,煅燒水滑石、礦渣、粉煤灰單摻摻量分別為6%、50%、20%時,海水海砂混凝土護筋性較好,Cl-固結能力較好。護筋性與Cl-固結能力呈現出良好的相關性。礦物摻合料摻量越高,水泥凈漿pH越低;煅燒水滑石摻量越高,水泥凈漿pH越高。改善海水海砂混凝土護筋性的能力依次為:煅燒水滑石>礦渣>粉煤灰,礦物摻合料對護筋性的影響十分有限。煅燒水滑石降低海水海砂混凝土的3d強度,但可增加海水海砂混凝土28d強度。Abstract:TheeffectofCLDH(CalcinedLayerdDoubleHydrixide)onrebar-protectingpropertiesofseawater-seasandconcretewasstudiedbyanalyzingcurveofrebarpolarizationandtime,chlorideioncombination,pHvalueofcementpasteandcomparedwiththeeffectofslagandflyash.Inaddition,themechanicalpropertiesofseawater-seasandconcretearealsostudied.TheresultsshowthatwhentheCLDHcontentis6%,theslagcontentis50%andtheflyashcontentis20%,rebar-protectingpropertiesofseawater-seasandconcreteisrelativelysuperior,chlorideioncombinationisrelativelysuperior.Thereisthegoodcorrelationbetweenchlorideioncombinationandrebar-protectingproperties.Themoreadmixturecontent,thelowerpHvalueofcementpaste;ThemoreCLDHcontent,thehigherpHvalueofcementpaste.Theabilityofimprovementofrebar-protectingpropertiesisinsequenceofCLDH>slag>flyash,theadmixturehaslimitedimprovementontherebar-protectingproperties.CLDHcandecreasethe3dstrengthofseawater-seasandconcrete,butincreaseits28dstrength.
喬治,張磊,王志杰,等.煅燒水滑石對海水海砂混凝土性能影響的研究[J].混凝土與水泥制品,2017(10):1-5.
QIAO Z, ZHANG L, WANG Z J,et al.Influence Research of Calcined Layerd Double Hydrixide on Performance of Seawater-seasand Concrete[J].China Concrete and Cement Products,2017(10):1-5.