58·2023年5月试验与研究江西建材骨料粒径与粉煤灰掺量对混凝土性能影响的探究王合平福泉市教育局,贵州福泉550500摘要:文中开展了混凝土抗压强度、抗拉强度随骨料粒径和粉煤灰掺量变化规律的研究。研究结果表明,短期养护龄期下,掺入粉煤灰后混凝土的力学性能与粉煤灰掺量表现为负相关,长期养护龄期下,掺入粉煤灰后混凝土的力学性能与粉煤灰掺量表现为先呈正相关后负相关;掺入粉煤灰后,混凝土抗拉强度和抗压强度在养护初期与骨料粒径呈正相关;当养护龄期为28d时,骨料粒径太大对混凝土的力学性能提升效果不明显;混凝土龄期影响因子与粉煤灰掺量呈正相关,与骨料粒径呈负相关。关键词:土木工程;混凝土;粉煤灰;骨料粒径;力学性能中图分类号:TU52文献标识码:A文章编号:1006-2890(2023)05-0058-04StudyontheInfluenceofAggregateParticleSizeandFlyAshContentonConcretePerformanceWangHepingFuquanEducationBureau,Fuquan,Guizhou550500Abstract:Inthispaper,thevariationlawofcompressivestrengthandtensilestrengthofconcretewithaggregateparticlesizeandflyashcontentwasstudied.Theresultsshowthatthemechanicalpropertiesofconcretemixedwithflyasharenegativelycorrelatedwithflyashcontentundershort-termcuring,whilethemechanicalpropertiesofconcretemixedwithflyasharefirstpositivelycorrelatedwithflyashcontentandthennegativelycorrelatedwithflyashcontentunderlong-termcuring.Afteraddingflyash,thetensilestrengthandcompressivestrengthofconcretearepositivelycorrelatedwithaggregateparticlesizeattheinitialcuringstage.Whenthecuringageis28days,theimprovementeffectofthemechanicalpropertiesofconcreteisnotobviouswhentheaggregatesizeistoolarge.Theinfluencefactorofconcreteageispositivelycorrelatedwithflyashcontentandnegativelycorrelatedwithaggregateparticlesize.Keywords:Civilengineering;Concrete;Flyash;Aggregatesize;Mechanicalproperty0引言粉煤灰是我国电厂排放的灰白色工业固体废弃物之一,近年排放总量持续升高[1-2]。此外,目前排放企业对粉煤灰的后续二次处理不当,对环境造成了严重的二次污染。当前,将粉煤灰替代水泥掺入到混凝土中,是发挥其剩余价值最有效的途径[2-31,不仅处理了固体废弃物,减少了对环境的污染,而且降低了水泥的使用量,节约了大量能源并减少了二氧化...