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ID:33364237
大小:4.70 MB
页数:75页
时间:2019-02-25
《工业废渣改良盐渍土路基填料的试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要盐渍土的病害严重影响了各等级公路的服务水平和使用年限,给国家造成了巨大的经济损失,因此对盐渍土路基填料的研究是很有必要。在国内外盐渍土路基填料研究基础上,本论文提出了以粉煤灰、钢渣等工业废弃物为主要材料的盐渍土改良方法,取得较好的效果。论文采用北方滨海盐渍土和人工配制不同含量的硫酸盐、氯盐、碳酸盐盐渍土进行试验,通过掺入粉煤灰.石灰以及钢渣.石灰等改良材料,进行不同龄期的无侧限抗压强度、CBR试验和水稳定性以及耐久性试验。研究结果表明,在含盐量一定范围内,盐渍土经粉煤灰.石灰以及钢渣一石灰等改良后,能够满足路基填料的要求。通过微观试验X射线衍射试验、差
2、热与热重试验和扫描电镜试验对生成物种类、含量和形貌,以及工业废渣改良盐渍土机理进行了初步分析。通过检测粉煤灰和钢渣的浸出液中有害元素的含量,评价工业废渣对环境的影响,试验结果表明各项指标都满足其各种标准。关键词:路基,改良盐渍土,石灰,粉煤灰,钢渣,微观试验,环境影响ABSTRACTThediseasesofthesalinesoilhaveseriouslyaffectedservicelevelandthespanlifeofvariousgradesofroad,whichhascreatedhugeeconomicharmtOthecountry,
3、thereforeitisveryessentialtostudythepaddingoftheroadbedofsalinesoil.Basedonthestudyonthepaddingoftheroadbedofsalinesoilhomeandabroad,industrialdiscardedproductssuchasfly·ash,slag,acetylenesludgeiscombinedwithlimetoimprovethesalinesoilinthispaper.InitiallyItdesignatesseveralkindsof
4、amendment,fly—ashandslag:finallydeterminestheimprovementplansandtheimprovementproportionresearchthroughtheshort—termwaterstability.Twokindsofsoilsareelectedinthispaper,oneissiltysoiloflowsaltcontentImprovementeffectandinfluenceofsaltycontentonstrengtharecontrastedafteraddingFA(Fly
5、Ash)一limeimprovedsulfate、chloride、carbonatesalinesoilwithdifferentcontent,anotherishighsaltcontentcoastalsalinesoil,mechanicalpropertyiscomparedaccordingtotwoimprovedprograms,slag—limetreatmentandlimetreatment;aterstabilityisstudiedbasedontwoimmergingcondition,freshwaterimmerginga
6、ndbitternimmerging;thetype,thecontentandtheappearanceoftheresultantareanalyzedaccordingtomicroscopicexperiment、Xraydiffractiontext、thermogravimetricanddifferentialscanningtextandscanningelectricitymirrorexperiment,andcombinewithmicroscopicexperimenttocarryonthetheoreticalanalysisf
7、ortheamendingmechanism.Accordingtoresearchofindustrialdiscardedproductsonenvironmentalinfluenceevaluation,contentofharmfulelementsonextractiedliquidoffly·ash、lime、acetylenesludgeisaccessed,theresultsofexperimentsindicateeachindexaccordswitheachstandard.Afterimprovement,thealkalini
8、tyofthesalinesoilisincreased,cont
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