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时间:2020-03-21
《新型现浇自保温墙体材料的力学性能试验研究.pdf》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、2014年第9期(总第299期1混凝土实用技术Number9in2014(TotalNo.299)ConcretePRACTICALTECHN0LOGYdoi:10.3969~.issn.1002—3550.2014.09.041新型现浇自保温墙体材料的力学性能试验研究杨伟军,张婷婷,朱检’,范辉(1.长沙理工大学,湖南长沙410114;2.同济大学,上海200092)摘要:以改性胶粉聚苯颗粒为浇筑料,整体现浇,对拉螺栓紧固挤压成型的墙体,其质轻保温、隔声耐火,可有效降低劳动强度,提高施工效率。设计了抗压、抗折、抗拉、拉拔和弹
2、性模量的试验。研究结果表明:气干状态下,材料的抗压强度随干密度降低呈指数衰减,与含水率并无规律可寻;材料的折压比、劈压比和弹性模量远大于同类型材料,材料韧性好,抵抗变形能力强;获得材料的极限拉拔力和拉拔强度指标,并对膨胀螺栓的选用及安装工艺作出说明;材料可做非承重内墙,结构节能一体化保温材料,复合到剪力墙、梁柱等热桥处,对工程材料应用具有一定的参考价值。关键词:现浇非承重墙;自保温材料;力学性能试验中图分类号:TU528.2文献标志码:A文章编号:1002—3550(2014)09—0156—05NewtYpeself-the
3、rmalinsulationwallmaterialsmechanicalpropertiesexperimentsYANGWeijun,ZHANGTingting,ZHUJian,FANHui(1.ChangshaUniversityofScienceandTechnology,Changsha410076,China;2.TongjiUniversity,Shanghai200092,China)Abstract:Withmodifiedpowderpolystyreneparticlesbeingusedasintegr
4、alcastin—situpouringmaterial,thepullingfasteningextru-sionboltedwallhasthefollowingadvantages:lightinweight,heatpreservation,soundinsulation,fire-proof,combinedwithefectivelyre-ducethelaborintensityandenhanceconstructioneficiency.Howeveritsmaterialmechanicalproperti
5、esisunclear.Aimtoprovideneces—saryparametersandmechanicalpropertiesforitspopularizationandapplication,theauthorsdesignedseriesexperimentsconcerningthecompressivestrength,bending,tensile,pullingandelasticitymodulustests.Resultsshowedthatunderthestateofgas—dry,thecomp
6、ressivestrengthofmaterialsdecreaseexponentiallywiththetheattenuationofdrydensityandwereirrelevanttothemoisturecontent.Materialfoldingratio,splitratioandelasticmoduluswerefargreaterthanthatofothermaterials.Thematerialwascharacterizedbygoodflexibili—ty,goodunti—deform
7、ationperformance.Limitdrawingforceandlimitdrawingstrengthindexofthematerialswereobtainedandthenex—plainedtheselectionandinstallationprocessofexpansionbolt.ThiskindofmaterialCanbeusedasinteriornonbearingwall,energy-savingintegrationofstructureheatpreservationmaterial
8、,compoundtotheshearwall,columnandbeamandotherthermalbridge.Ithascertainvalueofreferenceforengineeringmaterialsapplications.Keywords:nonbea
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