Effect of fly ash on swell behaviour of a very highly plastic clay

Süt-Ünver I., Lav M. A., ÇOKÇA E.

China-Europe Conference on Geotechnical Engineering, 2016, Vienna, Austria, 13 - 16 August 2016, pp.838-841 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.1007/978-3-319-97112-4_188
  • City: Vienna
  • Country: Austria
  • Page Numbers: pp.838-841
  • Middle East Technical University Affiliated: Yes

Abstract

Swellingofexpansivesoilscausesexcessivelreave.Resulting

expansion can leacl to cıınsiclerable distress to pavements and/or lightweight

stnıctures whrclr are settlecl on tbat kincl of subsoils. Several methtıds can [.ıe

applieil to control the swelling ploblem. one cıf the ınost ct)ınıı]onlv used

methocl is the addition of stabilizing agents, such as lime or fly ash tr,ı the

expansivesoil.Soilsamplesthatareveryhighlyplastichırvebeentır]cenfi.oırr

clayciepositsofAnkarainT..rkeyinthisstucly.Bothdisturbeclandunci-isturbed

,p""i..n.havebeenobtaineclinordertoperformlaboratorytests.Flyashhas

been used as the chemical stabilizer. Firstly, reference tests have beeıi carried

out on natural soil samples. Then the clay is mixed with fly ash at clifferent

percentages of clry weight of the soil ancl the engıneering propeıties of the

stabilizecl soil samples have been cleteImined. Inclex properties aırcl swelliııg

chalactedstics of the soil sanıples have been founcl. Results are evalı.ıatecl ancl

thechangesinthesepropertiesespeciallywithregarcltoswellpotential.havc

been interpreterl in this paper. optimum va]rıes have been cletermined for swell

potential.Thecorrelationsbetweentheindexproperties,thesrvellpercentage

and the swell pressure aıe presented,