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ID:33640541
大小:1.25 MB
页数:6页
时间:2019-02-27
《碱矿渣粉煤灰混凝土的冲击损伤特性》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、学兔兔第www.xuetutu.com17卷第6期建筑材料学报Vo1.17。No.62014年12月JOURNALOFBUILDINGMATERIALSDec..2O14文章编号:1007—9629(2014)06—1087—06碱矿渣粉煤灰混凝土的冲击损伤特性罗鑫,许金余,卢京平。,白二雷,李为民,刘志群(1.空军工程大学机场建筑工程系,陕西西安710038;2.西北工业大学力学与土木建筑学院,陕西西安7100723.北京市复兴路14号,北京100843;4.广空后勤部机场处,广东广州510052)摘要:以NaOH,Na2CO。为碱激发剂,制备了强度等级为C30的碱矿渣粉煤灰基混
2、凝土(ASFC),运用改进后的1OO分离式霍普金森压杆(SHPB)试验装置开展了冲击劈裂拉伸和压缩试验,从能量角度分析了ASFC在冲击荷载下的损伤特性,并进行了对比研究.结果表明:ASFC的破坏形态均随着入射能量平均变化率的增加而趋于严重,ASFC的能量吸收量也随入射能量平均变化率的增大而增加,但增加速率逐渐变缓,总体规律可用二次多项式关系来表示;ASFC在冲击压缩状态下的破坏状况明显比冲击劈裂拉伸状态下严重,而且能量吸收量和增加速率均远大于冲击劈裂拉伸状态;ASFC的抗冲击损伤能力随着冲击力度的增大而增加,且与冲击作用形式有关,在压缩状态下的抗冲击损伤能力比劈裂拉伸状态更为优异.
3、关键词:碱矿渣粉煤灰基混凝土;损伤特性;冲击劈裂拉伸试验;冲击压缩试验;分离式霍普金森压杆中图分类号:TU528.572文献标志码:Adoi:10.3969/j.issn.1007—9629.2014.06.026ImpactDamageCharacteristicsofAlkaliActivatedSlagandFlyAshBasedConcreteLUOXin,X己,Jinyu,LUJingping。,BAIErlei,LIWeimin,LIUZhiqun(1.DepartmentofAirfieldandBuildingEngineering,AirForceEngineer
4、ingUniversity,Xi’an710038,China;2.CollegeofMechanicsandCivilArchitecture,NorthwestPolytechnicUniversity,Xi’an710072,China;3.BeijingFuxingRoadNo.14,Beijing100843,China;4.AirportOffice,AirForceLogisticsDepartmentinGuangzhouMilitaryRegion,Guangzhou510052,China)Abstract:HighflowingC30alkaliactivat
5、edslagandflyashbasedconcrete(ASFC)waspreparedinwhichslagandflyashwereactivatedbyNaOH(NH)andNa2CO3(NC).Dynamicsplitting—tensileandcompres—siontestsweremadebythe#100splitHopkinsonpressurebar(SHPB)apparatusimprovedbyusingthepulseshapertechnique,anddamagecharacteristicsofASFCunderimpactloadingwere
6、measured.Inaddi—tion,acomparativestudywasmade.Theresultsindicatethat,fracturemorphologyofASFCtendstobeseriousandenergyabsorbingcapacityofASFCincreaseswiththeincreasingofincidentenergyaveragerate,however,increaserategraduallybecomeslow,andgeneralrulecanbeexpressedbyquadraticpoly—nomia1curve;fra
7、cturestateofASFCundertheconditionofimpactcompressionismoresignificantthanthatundertheconditionofimpactsplitting—tension,andenergyabsorbingcapacityandincreaserateundertheconditionofimpactcompressionaregreaterthanthatunderconditionofimpac
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