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时间:2019-03-01
《掺碎石陶粒多孔混凝土基本性能试验研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、学兔兔www.xuetutu.com2015年第6期(总第308期)混凝土实用技术Number6in2015(TotalNo.308)ConcretePRACTICALTECHNOLoGYdoi:10.3969/j.issn.1002~550.2015.06.038掺碎石陶粒多孔混凝土基本性能试验研究刘聃。刘荣桂。胡白香。徐荣进。殷杰。,温惠清(1.江苏大学土木工程与力学学院,江苏镇江212013;2.江苏金土木建设集团有限公司,江苏常熟215500)摘要:以黏土陶粒、碎石、水泥、Zs一1外加剂等为主要原料,制备了一种高性能陶粒多孔混凝土,通过试
2、验分析了骨料粒径、碎石掺量对陶粒多孔混凝土孔隙率、透水系数、强度等性能的影响,并对其破坏形态、破坏机理进行了分析。结果表明:纯陶粒骨料多孔混凝土的孔隙率为23%~27%,透水系数为6.3~7.1,强度为1—3MPa,在不显著降低孔隙性能的前提下,掺入碎石能有效提高其强度至15MPa以上;多孔混凝土的强度和孔隙率随骨料粒径的增大而小幅提高,且碎石掺量越大提高效果愈明显。与纯陶粒混凝土相比,碎石掺量为40%-60%、骨料粒径为20—25ITIITI时,多孔混凝土的强度提高了7倍,而孔隙率仅仅降低了4.2%,此时混凝土基本性能相对最优。关键词:陶粒多孔
3、混凝土;抗压强度;孔隙率;透水系数中图分类号:TU528.041文献标志码:A文章编号:l0o2—3550(2015)06—0144—05Experimentalstudyontheperformanceofporousceramsiteconcretewithdiferentgravelratiou【,Dan,LJ【,Ronggui,HUBaixiang,XURongjin,YIN.1ie,WENHuiqing(1.FacultyofCivilEngineeringandMechanics,JiangsuUniversity,Zhe~iang2
4、12013,China2.JiangsuGoldCivilConstructionGroupCorporation,Changshu215500,China)Abstract:High—performanceceramsiteporousconcremwaspreparedwiththeclayceramsite,gravel,cement,Zs一1admixture.Theinfluenceofaggregatesize,gravelratioonceramsiteporousconcre~performancessuchasporosity,
5、thepermeabilitycoefficient,andcompressivestrengthwereinvestigated,andthefailuremodesandmechanismofceramsiteporousconcre~wereadditionallyanalyzed.Theresultsshowthatporosity,thepermeabili哆coefficient,andcompressivestrengthofthepureceramsiteporousconcreteare23%~27%,6.3~7.1,1-3MP
6、a,respectively.ThestrengthoftheceramsiteporousconcreteCallbeeffectivelyincreasedupt015MPabythegravel—dopedwithnosignificantreduceintheporeproperties.Thecompressivestrengthandporosityofporousconcretewasmildlyimprovedastheaggregatesizewasincreased,thebiggergravelratiothemoreobv
7、iousimprovementwasobserved.Incomparisonwithpureceramsiteporousconcrete,sevenfoldincreaseinthecompressivestrengthofporousconcretewasachievedwhenthegravelratiowas40%-60%,andtheaggregatesizewas20-25mill,whiletheporositywasonlydecreasedby4.2%,theperformanceoftheporousconcretewasr
8、egardedtobeoptimized.Keywords:ceramsiteporousconcrem;compressivestre
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