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时间:2019-02-04
《再生混凝土自保温砌块墙体传热性能》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、第19卷第2期建筑材料学报Vo1.19,No.22016年4月JOURNALOFBUILDINGMATERIALSApr.,2O16文章编号:1007-9629(2016)02—0304—06再生混凝土自保温砌块墙体传热性能张会芝,郑建岚。(1.福州大学土木工程学院,福建福州350108;2.三明学院建筑工程学院,福建三明365004;3.福建江夏学院,福建福州350108;4.福建省环保节能型高性能混凝土协同创新中心,福建福州350108)摘要:测试了不同砌块墙体的热工性能,推导了多层墙体不稳定传热的传热系数,并编制相应的计算程序对不同材料墙体
2、的传热系数进行了理论计算.结果表明:当在墙体内外侧面粉刷2Omm厚普通砂浆或保温砂浆时,190mm再生混凝土自保温砌块墙体的传热系数为1.940W/(m·K)或0.961w/(m。·K),分别比相同条件下240mm黏土砖墙体和19Omm普通混凝土砌块墙体的传热系数降低2.95,36.02或1.44,17.79;再生混凝土自保温砌块墙体的传热系数受砌块中再生细骨料和玻化微珠掺量影响,当玻化微珠掺量(体积分数)大于60时,各种墙体传热系数相差不大;不同墙体传热系数的实测值和理论计算值的差值小于5.再生混凝土自保温砌块墙体具有良好的节能效果,具有工程应
3、用价值.关键词:再生混凝土;自保温砌块;墙体传热性能中图分类号:TU502.4文献标志码:Adoi:10.3969/j.issn.1007—9629.2016.02.016HeatTransferCharacteristicsofRecycledConcreteSelfInsulationBlockWallZHANGHuizhi。ZHENGJianlan。’(1.CollegeofCivilEngineering,FuzhouUniversity,Fuzhou350108,China;2.CollegeofArchitectureandCivil
4、Engineering,SanmingUniversity,Samming365004,China;3.FujianJiangxiaUniverisity,Fuzhou350108,China;4.FujJanCollaborativeInnovationCenterofEnvironmentalProtectionandEnergySavinginHighPerformanceConcrete,Fuzhou350108,China)Abstract:Thermalperformanceofdifferentmulti—levelwallswer
5、einvestigated,theunsteadyheatconduc—tionreactioncoefficientofmulti—levelwal1wasderivedandcorrespondingcomputerprogramwaspresen—ted.theheattransfercoefficientsofthedifferentkindsofmulti—levelwallwerecalculatedbyprogram.Theresultsshowthatwhenpasting2Ommthicknessmixedmortarorins
6、ulationmortaronouterandinnersurfaceofmulti—leve1wal1。theheattransfercoefficientof190mmthicknessrecycledconcreteselfinsulationblockwallis1.940W/(m·K)or0.961W/(m·K),2.95,36.02and1.44,17.79lowerthanthatof240mmthickclaybrickwalland190mmthicknorma1concreteblockwal1.respective—lY.T
7、heheattransfercoefficientofrecycledconcreteselfinsulationblockwal1iscloselyrelatedtothepropertiesofrawmaterials,i.e.recycledfineaggregatereplacementratioandglazedhollowbeadvolumefraction.Theheattransfercoefficientofdifferentmixproportionofrecycledconcreteselfinsulationblockwa
8、llsarelittledifferentwhenglazedhollowbeadvolumefractionishigherthan6
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