欢迎来到天天文库
浏览记录
ID:34744186
大小:350.59 KB
页数:5页
时间:2019-03-10
《关于不同骨料对抗冲耐磨混凝土性能的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、学兔兔www.xuetutu.com2013年第12期(总第290期)混凝土原材料及辅助物料Number12in2013(TotalNo.290)ConcreteMATERIALANDADMINICLEdoi:10.3969~.issn.1002-3550.2013.12.022不同骨料对抗冲耐磨混凝土性能的影响董芸,杨华全z,肖开涛z,周世华,王磊z(1.武汉大学水利水电学院,湖北武汉430072;2.长江水利委员会长江科学院,湖北武汉430010)摘要:研究了天然花岗片麻岩、灰岩、花岗岩和玄武岩人工骨料对抗冲耐磨混凝土力学性能、抗冲磨性能和抗裂性能的影响
2、。结果表明:花岗片麻岩天然骨料混凝土的强度和极限拉伸值较低,混凝土抗裂性和抗冲磨性较差,不适于用于抗冲耐磨混凝土;人工骨料中玄武岩骨料抗冲耐磨性能最好,但极限拉伸值较低,弹性模量较高,抗裂性较差;花岗岩人工骨料混凝土的极限拉伸值较高,抗裂性较好,抗冲磨强度仅次于玄武岩人工骨料混凝土;掺加人工合成纤维可以提高混凝土的抗冲耐磨性能,并可以极大改善混凝土的抗裂性能。采用高强度的人工骨料并掺加人工合成纤维是提高水工抗冲耐磨混凝土性能的重要技术途径。关键词:骨料;纤维;抗冲耐磨性能;抗裂性;水工混凝土中图分类号:TU528.041文献标志码:A文章编号:1002—35
3、50(2013)12—0082—05EffectofaggregateonperformanceofabrasionresistanceconcreteDONGYun一,YANGHuaquan2XIAOKaitao2,ZHOUShihua,WANGLei(1.CollegeofWaterResourcesandHydroelectricEngineering,WuhanUniversity,Wuhan430072,China;2.ChangjiangRiverScientificResearchInstitute,ChangjiangWaterResourc
4、esCommission,Wuhan430010,China)Abstract:Thispaperstudiestheeffectofvariousaggregatesonpropertiesofmechanical,abrasionresistantandcrackresistanceofabra—sionresistanceconcrete,suchasgraniticgneissnuturalaggregate,limestonecrushedaggregate,granitecrushedaggregateandbasaltcrushedaggreg
5、ate.Theresultsshowthat,amongconcreteswithexperimentalaggregates,strengthandultimatetensilevalueofconcretewithgraniticgneissnuturalaggregatearelowest,whichhaspoorabrasionresistantandcrackresistanceSOthatunfitfortheabrasionresis-tantconcrete.Amongexperimentalconcretes,concretewithbas
6、altcrushedaggregatehasthehigheststrengthofabrasionresistant,butlow—erultimatetensilevalueandhigherelasticitymodulus,SOthathasthepoorcrackingresistance.concretewithgranitecrushedaggregatehashigherultimatetensilevalueandpreferablyperformanceofcrackresistanceandabrasionresistance,whic
7、hisonlysecondtotheconcreteofbasaltcrushedaggregate.Thesyntheticfibercanimproveabrasionresistancestrengthoftheconcrete.Thecrackresistanceofconcretewithfiberisenhancedobviously.Adoptingartificialaggregatewithhi曲strengthandhi曲performancesyntheticfiberisthekeytechnicalapproachtoimprove
8、performanceofhydraulicabra
此文档下载收益归作者所有