doi:10.3963/j.issn.1674-6066.2023.01.003大掺量铁尾矿砂在预拌混凝土中的试验研究胡新军1,胡胜雄1,马海军2,万惠文3(1.武汉华强新型建筑材料有限公司,武汉430000;2.湖北地兴绿源建筑材料有限公司,武汉430000;3.武汉理工大学,武汉430070)摘要:采用铁尾矿砂与机制砂混掺成混合砂制备混凝土,主要研究了铁尾矿砂对混凝土工作性能、力学性能、干缩性能的影响。结果表明,制备C30混凝土时,可用50%铁尾矿砂与50%机制砂作混合砂;而制备C50混凝土时,铁尾矿砂与机制砂的合适比例为40%∶60%。铁尾矿砂对混凝土的流动性和坍落度损失影响都较小,但对混凝土的粘聚性影响较大。掺有铁尾矿砂的混凝土力学性能要比基准混凝土高,弹性模量也大;掺有铁尾矿砂的混凝土干燥收缩性能要好于基准混凝土。关键词:预拌混凝土;铁尾矿砂;混合砂;工作性能;力学性能ExperimentalStudyofIron-tailingSandwithLargeContentinReady-mixedConcreteHUXin-jun1,HUSheng-xiong1,MAHai-jun2,WANHui-wen3(1.WuhanHuaqiangNewBuildingMaterialsCoLtd,Wuhan430000,China;2.HubeiDixingLuyuanBuildingMaterialsCoLtd,Wuhan430000,China;3.WuhanUniversityofTechnology,Wuhan430070,China)Abstract:Thispapermainlystudiedtheinfluenceofiron-tailingsandontheworkability,mechanicalpropertiesanddryingshrinkagepropertyofconcretewhichusedthemethodofpreparingconcretewithmixedsandmadeofiron-tail-ingsandandmechanicalsand.Theresultsshowedthat50%iron-tailingsandand50%mechanicalsandcanbeusedasmixedsandwhenpreparingC30concrete;WhenpreparingC50concrete,theappropriateratioofiron-tailingsandtoma-chine-madesandwas40%∶60%.Forconcrete,iron-tailingsandhadlittleimpactonitsfluidityandslumploss,buthadagreaterimpactonitscohesiveness.Themechanicalpropertiesofconcretemixedwithiron-tailingsandwerehigherthanthatofbenchmarkconcrete,andtheelasticmoduluswasalsohigher.Thedryingshrinkageperformanceofconcretemixedwithiron-tailingsandwasalsobetterthanthatofbenchmarkconcrete.Keywords:ready-mixedconcrete;iron-tailingsand;mixedsand;workability;mechanicalproperties收稿日期:2022-11-21.作者简介:胡新军(1976-),高级工程师.E-mail:164779481@qq.com混凝土是目前世界上使用最大宗的建筑材料[1]。随着我国基础建设的迅速推进,预拌商品混凝土的需求量日益增长...
