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时间:2020-03-27
《滨海氯盐盐渍土加固工程特性.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34卷第4期土木工程与管理学报Vol.34No.42017年7月JournalofCivilEngineeringandManagementJuly2017滨海氯盐盐渍土加固工程特性张真怡ꎬ罗阳楚君ꎬ裴向军(成都理工大学环境与土木工程学院ꎬ四川成都610059)摘要:盐渍土广泛分布于我国东部沿海地区ꎬ在工程建设中常出现溶陷、盐胀及腐蚀性等病害ꎬ对工程建设造成了极大地危害ꎮ试验采用成都理工大学自主研制新型抗盐胀固化材料SD作为固化剂对人工配置氯盐盐渍土进行室内试验ꎬ研究固化剂对氯盐盐渍土工程特性的影响ꎮ试验表明ꎬ抗盐胀固化剂可有效提高氯盐盐渍土强度ꎬ降低盐渍土膨胀性ꎬ固
2、化剂掺量为2.5%ꎬ5%的试样28d抗压强度相较于纯水泥试样分别增加56.72%ꎬ95.52%ꎬ抗折强度分别增加48.11%ꎬ52.53%ꎻ添加了固化剂试样线膨胀量约为纯水泥加固试样的的0.2倍ꎮ该固化剂有效提高了工程质量ꎬ延长其使用寿命ꎬ大大提高了工程经济效益ꎮ抗盐胀固化剂主要是通过抑制盐渍土中的盐离子与铝酸钙的反应即抑制Friedel盐和钙矾石的生成来达到固化氯盐盐渍土的目的ꎮ关键词:氯盐盐渍土ꎻ抗盐胀固化剂ꎻ工程特性ꎻ固化机理中图分类号:TU472.5文献标识码:A文章编号:2095 ̄0985(2017)04 ̄0059 ̄05EngineeringCharacter
3、isticofReinforcementChlorineSalineSoilinCoastalZHANGZhen ̄yiꎬLUOYang ̄chu ̄junꎬPEIXiang ̄jun(CollegeofEnvironmentandCivilEngineeringꎬChengduUniversityofTechnologyꎬChengdu610059ꎬChina)Abstract:SalinesoiliswidelydistributedintheeasterncoastalareasinChinaꎬanddissolvingdepressionꎬexpensionsaltan
4、dcorrosiveandotherdiseaseswhichoftenappearinengineeringconstructionꎬcausedtheharmgreatlyonconstructionengineering.LaboratoryexperimentofartificialpreparationofchlorinesalinesoilwascarriedwithresistancetosaltexpansioncuringagentwhichindependentlydevelopedbyChengduUniversityofTechnology.Th
5、eeffectsofthecuringagentchlorinesalinesoilengineeringpropertiesisanalyzedꎬandthecuringagentforcuringmechanismofchlorinesalinesoilisresearched.Theexperimentshowsꎬresistancetosaltexpansioncuringagentcaneffectivelyimprovethestrengthofchlorinesalinesoilꎬandlowerdilatabilityofsalinesoil.Curin
6、gagentcontentis2.5%ꎬ5%ofthesampleof28dcompressivestrengththanthepurecementspecimensrespectivelyincreasedby56.72%ꎬ95.52%ꎬtheflexuralstrengthwereincreasedby48.11%ꎬ52.53%ꎻAddtheamountofcuringagentsamplelinearexpansionisabout0.2timesofpurecementsample.Thecuringagenteffectivelyimprovestheengi
7、neeringqualityandprolongitsservicelifeꎬgreatlyimprovingtheeconomicbenefitsoftheproject.SaltexpansioncuringagentsbyinhibitingthereactionofsaitionsinsalinesoilandcalciumaluminateꎬnamelysuppressionthegenerationofFriedelandettringitetoachievepurposesofcuringchlorinesoil.Keywo
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