碱矿渣混凝土氯离子渗透及钢筋锈蚀性能分析-analysis of chloride ion penetration and steel corrosion performance of alkali-activated slag concrete.docxVIP

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碱矿渣混凝土氯离子渗透及钢筋锈蚀性能分析-analysis of chloride ion penetration and steel corrosion performance of alkali-activated slag concrete.docx

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碱矿渣混凝土氯离子渗透及钢筋锈蚀性能分析-analysis of chloride ion penetration and steel corrosion performance of alkali-activated slag concrete

ABSTRACTAlkaliactivatedslagconcreteisakindofenergy-savingandenvironment-friendlybuildingmaterials.Ithasexcellentphysicalmechanicalpropertiesanddurability.ThecorrelationtheoryofAlkaliactivatedslagconcretehasbecamematureddayafterday.TheresearchonChlorideionpermeabilityandreinforcementcorrosionofAlkaliactivatedslagconcreteisverylittle.TheresearchisimportanttopromotionofAlkaliactivatedslagconcreteinthebaseofreinforcedconcreteandprestressedconcreteprojectsintheapplication.Thespecialsurfaceofslag,alkalinekind,alkalicontent,modulusofwaterglassandmineraladmixtureswasfoundtoaffecttheChlorideionpermeabilityandreinforcementcorrosionofAlkaliactivatedslagconcrete.Inthispapertheywerestudiedbythewayoftherapidchloridepermeabilitytest(ASTM1202)andwetanddrycycle.Andtherelationshipbetweentheporestructure,interfacefeaturesandchlorideionpermeability,thereinforcementcorrosionwasstudied.Theresultshows:①Whenthesolutiontoslagratioisfrom0.43to0.53,thecoulombspassedconcretein6hrsincreasedwiththeratioincreasedinthesameconditions,theChlorideionpermeabilityandreinforcementcorrosionofAlkaliactivatedslagconcreteactivatedwithwaterglassincreasedwiththerationincreased.②Whenthespecialsurfaceofslagisform302m2/kgto517m2/kg,thecoulombsdecreasedwiththespecialsurfaceincreasedinthesameconditions,thechlorideionpermeabilityincreasedwithspecialsurfaceincreased.③Inthesameconditions,ThereinforcementcorrosionofAlkaliactivatedslagconcreteactivatedwaterglassdecreasedwithalkalicontentandthemodulusofwaterglassincreased.④Whentheflyashcontentisfrom30%to70%,thecoulombspassedconcreteincreasedwiththecontentincreased.TheChlorideionpermeabilityincreasedwiththecontentincreased,andthereinforcementcorrosionofAlkaliactivatedslagconcretedecreased.Fromthepointofviewofcontrollingchlorideionpermeabilityandreinforcementcorrosioninalkaliactivatedslagconcrete,theamountofflyashtakingtheplaceofslagshouldbelowerthan50%.Whenthesilicafumecontentisfrom5%to15%,thecoulombspassedconcretedecreasedwiththecontentincreased.TheChlorideionpermeabili