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页数:4页
时间:2019-02-27
《膨胀剂对自密实混凝土力学性能影响》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、2013年第5期(总第283期)混凝土原材料及辅助物料Number5in2013(TotalNo.283)ConcreteMATERIALANDADMINICLE膨胀剂对自密实混凝土力学性能影响孟志良1I2。李国宇,马晓伟s,薛银生’,周炯’(1.河北农业大学城乡建设学院,河北保定071001;2.重庆大学材料科学与工程学院,重庆400045;3.保定慕湖恒源新型建材有限公司,河北保定071001)摘要:通过试验研究了膨胀剂掺量对自密实混凝土抗压强度、轴心抗压强度、劈裂抗拉强度和静力弹性模量等力学性能的影响。结果表明:①随着膨胀剂掺量增加,自密
2、实混凝土抗压强度、轴心抗压强度和劈裂抗拉强度先提高后降低,存在峰值,但是其静力弹性模量没有明显的变化规律;②与未掺膨胀剂自密实混凝土相比,掺膨胀剂自密实混凝土28d的抗压强度、劈裂抗拉强度和静力弹性模量均有不同程度提高;③不管是否掺人膨胀剂,随着龄期增加,自密实混凝土抗压强度、轴心抗压强度、劈裂抗拉强度和静力弹性模量变化规律基本一致。关键词:膨胀剂;自密实混凝土;基本力学性能中图分类号:TU528.042.4文献标志码:A文章编号:1002—3550(2013)05—0089—04Influencesofexpansionagentonthem
3、echanicalpropertiesofself-compactingconcreteMENGZhi—liang1,2,LIGuo-yu1,MAXiao—wei3,XUEYin—sheng~,ZHOUJiong(1.CollegeofUrbanandRuralConstruction,AgriculturalUniversityofHebei,Baoding071001,China;2.CollegeofMaterialScienceandEngineering,ChongqingUniversity.Chongqing400045,Chin
4、a;3.BaodingMuhuHengyuanNewBuildingMaterialsCo.,Ltd,Baoding071001,China)Abstract:Influencesofexpansionagentonmechanicalpropertiesofself-compactingconcretesuchascompressivestrength,axialcompressivestrength,splittingtensilestrengthandstaticmoduluswereca~iedoutthroughtheexperime
5、ntalstudy.Theresultsshowedthat:Withtheincreaseofexpansionagentdosage,thecompressivestrength,axialcompressivestrengthandsplitingtensilestrengthofself-compactingconcreteincreasedfirstlyandthendecrease.Therewasapeakvalue,butitsstaticmodulusofelasticityhadnosig—nificantvariation
6、withtheincreaseofexpansionagentdosage,whenexpansionagentwasaddedtotheconcreteasasubstituteforce—mentingmaterials.②Comparedwithself-compactingconcretewithoutexpansionagent,the28dcompressivestrength,28daxialcom-pressivestrength,28dtensilestrengthand28dstaticmodulusofelasticity
7、oftheself-compactingconcretemixedwithexpansivea-genthadimprovedindifferentdegrees.(Whetherornottheexpansionagentwasaddedtotheconcrete,thevariationsofcompressivestrength,axialcompressivestrength,splitingtensilestrengthandstaticmodulusofself-compactingconcretewerebasicallyiden
8、ticalwiththeincreasingage.Keywords:expansionagent;self-compactingconcrete;b
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