膨胀剂对自密实混凝土力学性能影响

《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