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