欢迎来到天天文库
浏览记录
ID:53755756
大小:1006.56 KB
页数:6页
时间:2020-04-23
《大掺量粉煤灰淤泥固化土的强度与耐久性研究-论文.pdf》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、第33卷第12期岩土力学Vl01-33No.122012年12月RockandSoi1MechanicsDec.2012文章编号:1000-7598(2012)12—3659—06大掺量粉煤灰淤泥固化土的强度与耐久性研究王东星,2一,徐卫亚,2(1.河海大学岩土工程研究所,南京210098;2.河海大学岩土力学与堤坝工程教育部重点实验室,南京2100983.国立杜埃高等矿业学院土木与环境工程学院,杜埃59500,法国)摘要:基于传统水泥和石灰固化处理方法,提出了利用大掺量低钙粉煤灰、水泥和石灰固化剂进行淤泥固化处理
2、的方法,以期改善淤泥的强度和耐久性,达到淤泥和粉煤灰双重资源化利用的目的。通过一系列室内试验,探讨了该方法处理后固化淤泥的击实特征、强度特性、水稳性和耐久性。试验结果表明:淤泥固化后最优含水率有所降低、最大干密度则略有增加;弹性模量、无侧限抗压强度和抗拉强度均有不同程度的增加,水泥掺量越大,养护时间越长,强度和弹性模量越大;固化后淤泥水稳性得到明显改善;浸水软化和冻融循环导致固化土抗压强度显著劣化,冻胀融缩导致设计混合料的无侧限抗压强度减小约22%。关键词:大掺量粉煤灰;固化淤泥;强度;水稳性;冻融循环中图分类号:
3、Tu43文献标识码:AResearchonstrengthanddurabilityofsedimentssolidifiedwithhighvolumeflyashWANGDong.xing,一.XUWei—ya,(1.GeotechnicalResearchInstitute,HohaiUniversity,Nanjing210098,China;2.KeyLaboratoryofMinistryofEducationforGeomechanicsandEmbankmentEngineering,HohaiUn
4、iversity,Nanjing210098,China;3.CivilandEnvironmentalEngineeringDepartment,EcoledesMinesdeDouai,Douai59500,France)Abstract:Basedonthetraditionalcement-treatmentandlime—treatmentmethods,thestabilizersbyusinghighvolumelow—calciumflyash,limeandcementareproposed,in
5、ordertoimprovethestrengthanddurabilityofmarinesedimentsandtoachievetheresourceutilizationofmarinesedimentandlow-calciumflyash.Aseriesoflaboratorytestswereperformedtoinvestigatethevariationofcompactioncharacteristic,strengthproperty,waterstabilityanddurabilityo
6、fsolidifiedmarinesediments.Theexperimentalresultsshowthattheadditionofdesignedstabilizerscausesadecreaseinoptimumwatercontentandaveryslightincreaseinmaximumdrydensitycomparedtountreatedsediments.Theelasticmodulus,unconfinedcompressivestrengthandtensilestrength
7、increasetodifferentlevels,whilethestrengthandelasticmodulusincreasesmoresignificantlywithhighercementcontentandlongercuringtime.Thewaterstabilitycanbegreatlyamelioratedaftersolidificationtreatmentcomparedtountreatedsediments.Finally,thestrengthperformanceofsol
8、idifiedsedimentscouldbesignificantlydecreasedbywaterimmersiondamageandthawing-freezingcycles,andtheunconfinedcompressivestrengthsofdesignedmaterialsaredecreasedbyabout22%duetotheth
此文档下载收益归作者所有