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时间:2019-02-04
《全轻混凝土基本力学性能试验研究》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、2010年第5期(总第247期)混凝土原材料及辅助物料Number5in2010(TotalNo.247)ConcreteMATERIALANDADMINICLEdoi:10.3969~.issn.1002—3550.2010.05.026全轻混凝土基本力学性能试验研究李长永。钱晓军。赵顺波(华北水利水电学院生态建筑材料河南省高校重点实验室培育基地,河南郑州450011)摘要:研究了水泥用量、水灰比、砂率对全轻混凝土立方体抗压强度、轴心抗压强度、劈裂抗拉强度、轴心抗拉强度和抗弯强度的影响。结果表明:全轻混凝土受压破
2、坏形态为散体状、受拉断裂面平齐,呈现明显的脆性破坏特征;全轻混凝土的强度取决于水泥砂浆强度和陶粒强度的强弱,存在使全轻混凝土各强度指标达到最佳值的砂率、水泥用量和水灰比。与普通混凝土及采用轻粗骨料、普通砂的轻骨料混凝土不同,全轻混凝土的轴心抗压强度接近于其立方体抗压强度、轴心抗拉强度高于劈裂抗拉强度,对此需进一步系统研究。关键词:全轻混凝土;页岩陶粒;轻砂;抗压强度;抗拉强度;抗弯强度中图分类号:TU528.2文献标志码:A文章编号:1002—3550(2010)05—0079—04Experimentalstud
3、y0nbasicmechanicalpropertiesoffulllight-weightconcreteLIChang-yong,QIANXiao-jun,ZHAOShun—bo(CultivatingBaseforUniversityKeyLaboratoryofEco—high—performanceEngineeringMaterialsinHenanProvince,NorthChinaInstituteofWaterConservancyandHydroelectricPower,Zhengzhou4
4、50011,China)Abstract:Theexperimentswereconductedtostudytheinfluencesofcementcontent,watertocementratioandsandratioonthecubiceom—pressivestrength,axialcompressivestrength,splitting—tensilestrength,axial—tensilestrengthandflexural—tensilestrengthoffulllight—weig
5、htcon—cretecompositedwithexpanded—shaleandlight—weightsand.Itisprovedthatthefulllight—weightconcretewasfailedasobviousbrittlenessincrushedstateundercompressionandevenbreakingcross—sectionundertension.Thefulllight—weightconcretestrengthsreliedonwhichwaslargerbe
6、tweenthestrengthofcementpastandthatofexpanded—shale,therewereoptimumvaluesofsandratio,cementcontentandwatertocementratiotomaketheoptimumvaluesofeverystrengthsoffulllight-weightconcrete.Forthefulllight—weightconcrete,diferentlyfromtheordinarycon—creteandtheligh
7、t—weightconcreteonlycomposedwithlight—weightcoarseaggregate,theaxialcompressivestrenlgthwasclosedtothecubiceom—pressivestrength,andtheaxial—tensilestrengthwaslargerthanthesplitting—tensilestrength,SOthatfurtherstudiesshouldbeconductedtOcladfythemechanismorreas
8、ons.Keywords:fulllight·-weightconcrete;expandedshale;compressivestrength;tensilestrength;flexural-tensilestrength0引言展全轻混凝土的研究与应用实践具有重要理论和工程价值。、枳轻质、措抗雷震、持抗裂u壬和rI耐耐久性台能b好z1试峨验粕概慨况∥等优
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