Abstract
Marble spoil waste is an environmental nuisance. The effects of adding waste marble fines (WMF) on the plasticity, strength and permeability of a lateritic clay have been investigated for its potential use as a soil modifier or stabilizer of road pavement layer materials or earth-building materials. The chemical compositions of the WMF and soil were determined using X-ray fluorescence and atomic absorption spectrometry, respectively. The specific gravity, Atterberg limits, compaction, strength and permeability characteristics of the soil were determined for varying proportions of the soil-WMF blends. The properties of the natural soil – classified as clay of low plasticity (CL) andA-7-6(7), according to unified soil classification and AASHTO classification systems, respectively – were improved after the addition of 10% WMF such that it behaves like a silt of low plasticity. Therefore, WMF is recommended as a low-cost soil modifier or stabilizer for lateritic soil and well-suited for road construction applications.
Highlights
The purpose of this study is to investigate the effects of adding waste marble fines (WMF) on the plasticity, strength and permeability of the most widely available soil type in tropical and sub-tropical countries
The WMF consists predominantly of lime (CaO) while the soil sample is rich in silica (SiO2)
Addition of WMF to the soil notably altered its geotechnical properties, causing: (i) a reduction of its plasticity, thereby making the soil more workable; (ii) an improvement in its strength; and (iii) a reduction in the soil permeability. These findings are important, especially when the treated soil is used as a road pavement layer material or when it directly receives the structural foundation of buildings, as the amount of water that can pass through it becomes reduced–thereby reducing the possibility of water-induced failures and extending the life of the pavement or building structures founded on such soil layers
Summary
BOOTHb aDeGbpCauornntmsttiresunHCcttoiieoifpenCuNairvnniodlileEvPknargsoki5pn1,e,erVetJryaaindRagkie,msCeTasorrlcBulehugaeC2r,teoknfBetEravneii,gbcFisana6ec,LeurJliiatmnyagao,nfnCisEeon3vJ,veuniMrhaoannantmrsUieoknnnaitv7aeT,nrrsOdiutlyTug,e4aOc,htMnao, luNotgiegyer,r8ia 1, 7Institute of MoleculaUrnaivnedrsCityelol fBthioeloWgeys,tFoaf cEunltgylaonfd,SBcSie1n6ce1QaYndBrTiestcohln, oUloKgy, University of Tartu, 23 Riia str., 51010 Tartu, Estonia 1, 2, 4Institute of Ecology andSuEbamrtithteSdc2ie5nAceusg, .F2a0c1u4l;tyacocfepStceiden2c4eDaencd. 2T0e1c4hnology, University of Tartu, Abstrac3t., plasticity, 8sMtIrnaesrntbgilttehustapenodoilfpwMearsmitceeraiosbbialiinotyleo4ong6fvyiaVroalaanntnmederemiBtniuctiaoiclstleenaycushithsnraa.onv, lec5oeb1g. ITthtedpr6opMertaire.s 2o0f 1th2e; naactcuerpaltesodil1–4cAlasusgif.ie2d0a1s2clay of low plasticity (CL) and. Chemical analyses revealed significant decreases in TNT concentrations, including reduction of some of the TNT to its amino derivates during the 28-day. MtcicpnrooouanlIlocinrssutbtdhiWrRBuMpfsKrloiuee,u(asrnaeencLgoihg,afyrni,utlaegifnsitwioggolgrktioeaentuesouarsengebsnetrtovenseyeeidceovtrixomddrcekssifeatsi:serrotepmte,ttocnasithoTrfpmVuatcfoaeieNet.ltdtnut2l;tiacsi.hslienu1TltrJevu2daicau(mg,sart0ou3onhmitvb0n)oorrpeicai:oia8anvnraaeonbt1Tn;atpt,aiqsaei5aEolNeolupunrdl3ilrnatnghi-bTadiÁyanGdmy,sur,1ladht,riJedia6neotn.lyoasm;2dpneerdoisug.leMtirnaeetmnalrmihbidgvnatognusitaai,edcsliftotbitlgdc,piaestminpeneusyioc:rta,tu/,aiituna/omftttdcblaOiiiollinnchoploxyina..oa.tnt.tfdgae2d2unsauAsentt00aoktrashilt1al1enmeineyathe.ns13dhdosduae.).caiorn.lbefITgfMpvfauotft,oi/aetsoergo1llirjirolucohla0couMyitdsrnu.cswts3ouphoht,grae8sbhcloinmihp:a4negieuisaahn6dnNehgs-llytT/n1sbtoctNo6oaalev4rtcmTneia8tohmek6mtlwtcttednarurhih8,teeliue,naat9aieedHagtinsncJs7ylioylrtweuoais...e,astn;d2cputry2tasdmi0arfrToos0aatdainn1ctrrnhna0tchiea2uutink,ei9esel.oamnu7smi)mdnnoatn,wc2.otpfgrraig1hbJecarteeeE.r7arayr;tstadbpo8oelnthsLiel4wlurvboneemea.iiginicrpmatTsTnihqoehcleoloandhuNdrearcionmue,clanoTaabetorwuedmsr,lirnltkseanhaiohBmputsaelstaivuei.slsicuuk;clieoluhnetoinerEaTntsaxdibmiancrltnptulbfyuyiadgsmyern.lrnuooiroedntaui,ipmofmlelcenfrtMeoaabneioetrtmurir,hnsiyc.ons;oatceetoreg.nahiusCellgbesmdeaaleactiruinniplunoecrnvadudgaludadnaanriLntaanrdnrpitnadoegdsiliaencdcao.nrnkedevanunM,asasp(itc,sclMttsbeyeoular.G,ylsirpauoiaewTet.erlensl;sohehptvdfoeeeoeursrrlroee---, tIontorbotdauinctfiionnished marble products, a significant amount 2011G).ivBenacthereianumisanycedeogfrtahdeespToNil,Tatutenmdeprtsahearvoebibceeonr of marble waste is usually generated. 2o0f0t9h; eEsreguennz2y0m11e;s cmutitliitnagryanadrepaosli(sShtienngutiot, oAbgtaaitnhofisni2sh01ed0).mTarNblTe phraosdbuceetsn greenpeorratteedabtoouhta4v0e%moufttahgeenvoicluamnedocfatrhceineoxgtreancitcedpomteanrbtilael binlocsktsudasiews awstieth(SsaebvoeyraalJr.oergt aanl.is2m00s,7)i.nTchluedcinugttinbgacpterori-a c(eLsascahloanecegeenteraal.tes19m9a9r)b, lewhduicsht ohfaasboleudt 2e0n–v3ir0o%nmofenthtael wageiegnhctieosf ttohedmecalarbreleablhoicgkhs p(Arigoarritwyaflo, rGuitlsatrie2m0o0v6a; lAflryoammsoaicls, I(nvcaen2D00il9le)w. Experimental insights of using waste marble fines to modify the geotechnical properties
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