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节能与环保
石东升1，杨嘉奇1，韩佳彤2，李召波2
摘 要：为研究两种水胶比粒化高炉矿渣高强水泥基材料的盐冻与自愈性能，利用快速冻融法进行盐冻与自愈试验。结果表明，经过500次盐冻循环后，粒化高炉矿渣高强水泥基材料的总体抗压强度下降率与普通石英砂高强水泥基材料类似；盐冻循环后经过适当养护，粒化高炉矿渣高强水泥基材料和普通石英砂高强水泥基材料的抗压强度均有提高。扫描电镜（SEM）及硬化混凝土气孔结构测定仪测试结果表明，不同冻融循环下的含气量均表明粒化高炉矿渣高强水泥基材料有一定的自愈能力。Abstract:Thesaltfreezingandself-healingpropertiesofgranulatedblastfurnaceslaghighstrengthcement-basedmaterialsoftwokindsofwater-binderratiowerestudiedbythesalt-freezingandself-healingtests.Theresultsshowthatafter500timesofsalt-freezingcycles,theoverallcompressivestrengthdroprateofgranulatedblastfurnaceslaghighstrengthcement-basedmaterialsissimilartothatofquartzsandhighstrengthcement-basedmaterials.Bymoderatecuringaftersalt-freezingcycles,thecompressivestrengthofgranulatedblastfurnaceslaghighstrengthcement-basedmaterialsandquartzsandhighstrengthcement-basedmaterialsisincreased.Theresultofscanningelectronmicroscopy(SEM)andthestomatalstructuretesterforhardenedconcreteshowthatthegascontentunderdifferentfreeze-thawcyclesindicatesthatthegranulatedblastfurnaceslaghighstrengthcement-basedmaterialshasself-healingcapability.
石东升,杨嘉奇,韩佳彤,等.粒化高炉矿渣高强水泥基材料盐冻与自愈性能试验研究[J].混凝土与水泥制品,2020(4):96-99.
SHI D S,YANG J Q,HAN J T,et al. Experiment Study on Salt Freezing and Self-healing Properties of Granulated Blast Furnace Slag High Strength Cement-based Materials[J].China Concrete and Cement Products,2020(4):96-99.
陈 登1，宋旭艳1，姜正平1，何智海2
摘 要：研究了不同种类、形态的秸秆和粉煤灰复掺对混凝土的工作性、力学性能和保温性能的影响。结果表明，秸秆会降低混凝土的坍落度、表观密度、强度和导热系数，而粉煤灰的掺入能够提高秸秆混凝土的坍落度，但降低其表观密度、强度和导热系数；掺秸秆粉混凝土的工作性、强度和保温性能优于掺秸秆条混凝土；三种秸秆中，掺油菜秸秆混凝土的工作性、强度和保温性能均优于小麦秸秆和玉米秸秆。Abstract:Theeffectsofdifferenttypesandshapesofstrawandflyashonworkingperformance,mechanicalpropertyandthermalperformanceofconcretewereinvestigated.Theresultsshowthattheslump,apparentdensities,strengthandthermalconductivityvaluesofconcretedecreasewiththeincreaseofthecontentofstraw.Theslumpofconcreteincreaseswhiletheapparentdensities,strengthandthermalconductivityvaluesdecreasewiththeincreaseofthecontentofflyash.Theworkingperformance,strengthandthermalperformanceofconcretecontainingthestrawpowderarebetterthanthatofconcretecontainingthestrawstripe.Theworkingperformance,strengthandthermalperformanceofconcretecontainingrapestrawarebetterthanthoseofcontainingwheatstraworcornstraw.
陈登,宋旭艳,姜正平,等.秸秆与粉煤灰复掺对混凝土性能的影响[J].混凝土与水泥制品,2020(4):100-103.
CHEN D,SONG X Y,JIANG Z P,et al.Effects of Combined Admixture of Straw and Fly Ash on the Properties of Concrete[J].China Concrete and Cement Products,2020(4):100-103.