HEAL DSpace

Enhancement of hardpan formation by amending sulphidic tailings with limestone or fly ash

Αποθετήριο DSpace/Manakin

Εμφάνιση απλής εγγραφής

dc.contributor.author Xenidis, A en
dc.contributor.author Mylona, E en
dc.contributor.author Harokopou, AD en
dc.date.accessioned 2014-03-01T01:26:17Z
dc.date.available 2014-03-01T01:26:17Z
dc.date.issued 2007 en
dc.identifier.issn 09670513 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/17988
dc.subject Fly ash en
dc.subject Hardpan en
dc.subject Limestone en
dc.subject Sulphidic tailings en
dc.subject.other fly ash en
dc.subject.other hydraulic conductivity en
dc.subject.other lignite en
dc.subject.other limestone en
dc.subject.other soil amendment en
dc.subject.other tailings en
dc.subject.other Attica en
dc.subject.other Eurasia en
dc.subject.other Europe en
dc.subject.other Greece en
dc.subject.other Lavrion en
dc.subject.other Southern Europe en
dc.title Enhancement of hardpan formation by amending sulphidic tailings with limestone or fly ash en
heal.type journalArticle en
heal.identifier.primary 10.2462/09670513.697 en
heal.identifier.secondary http://dx.doi.org/10.2462/09670513.697 en
heal.publicationDate 2007 en
heal.abstract The potential formation of low-permeability hardpan layers by mixing limestone or lignite fly ash with oxidized sulphidic tailings was investigated under actual field conditions. Field tests covering an area of 900 m2 were implemented in Lavrion, Greece. The field testing area was divided into four equal testpads, which were filled with: (a) Lavrion sulphidic tailings without any amendment (control test); (b) sulphidic tailings covered by a 60-cm-thick layer of tailings homogeneously mixed with 75 kg/t limestone; (c) sulphidic tailings - 75 kg/t limestone mixture having a thickness of 150 cm; and (d) sulphidic tailings covered by a 30-cm-thick layer of tailings homogeneously mixed with 180 kg/t lignite fly ash. After four years of field test operations, cemented layers or hardpan, exhibiting increased resistance to penetration, were formed in the testpads. The hardpan layer in the control test was observed at a depth of 65 cm and had a thickness of 30 cm. Limestone and fly ash addition to the oxidized tailings resulted in the formation of hardpan layers at depths of 35 cm and 15 cm respectively. The samples collected from the hardpan layers had paste pH higher than 4.5, as compared to pH 2.0 of the oxidized tailings. Limestone was proved to be more effective than fly ash in neutralizing the acidity and maintaining near-neutral pH conditions within the hardpan. On the other hand, the hardpan samples collected from limestone and fly-ash-amended testpads exhibited similar hydraulic conductivity values in the order of 10-6 m/sec. © 2007 EPP Publications Ltd. en
heal.journalName Land Contamination and Reclamation en
dc.identifier.doi 10.2462/09670513.697 en
dc.identifier.volume 15 en
dc.identifier.issue 3 en
dc.identifier.spage 359 en
dc.identifier.epage 373 en


Αρχεία σε αυτό το τεκμήριο

Αρχεία Μέγεθος Μορφότυπο Προβολή

Δεν υπάρχουν αρχεία που σχετίζονται με αυτό το τεκμήριο.

Αυτό το τεκμήριο εμφανίζεται στην ακόλουθη συλλογή(ές)

Εμφάνιση απλής εγγραφής