ÖZETGeçirgen topraklar üzerinde inşa edilen 'su depolama yapıların temellerindenaş'lrl sızma kayıpları meydana gelmektedir. Özellikle suya ş(ddetli gereksinme duyulankurak ve yarı kurak iklim bölgelerinde büyük öneme sahip olan bu ,kayıplarmönüne, geçmek itin rezervuar tabanının geçirimsiz bir mazemeyle kaplanması gerekmektedir.'Toprak-çımeto kartşımlar düşük nwliyetli kaplama malzemesi olarak 20 yt/danfazla bir zamandan beri su depola~a yapıl~rında başarılı bir şekilde uygulanmaktadır,Bu araştırmada, sık/ştmlmış toprak-çimelJ/O kartşımIann bu tip yapılardaekonomik kaplama malzemesi olarak sızma kayıplarım azaltmak için kullanabilirliği saptanmaya çalışılmıştır.THE UTİLIZATİON OF SOİL-CEMENT MİXTURE FOR REDUCİNGSEEPAGE LOSSES IN THE SMALL WATER STORAGE RESERVOİRSSUMMARYSmall water cotaining structures are nOW an important SOUl'ce of irrigationwater in the arid and semİ arid climate condition. But excess seepage losses are'very importam, this kind of structpres.Soil-cement has been used succesfuly to reduCt: seepage losses and as a lawcost lining material for both small and large water storage reservoirs.This study is condueted to determine an economical' lining material in orderto prevent seepage losses in the smaIl water reservoir and farm ponds. For thispurpore 3 soils were selected having different texture and Atterberg limits as abase material among the lO soil samples. Pordland cement is used as soil additivesto stabilize the soiI. FolJowing conclusion is drown by obtained from the test.- The soils" used in this study have common gradiation according sİeve analysis.Liquid timit values of the soils are between 26,4 %and 31,3 ~~, plastic indexvalues are between. 6,4 %and 14,6 %' Accaordirig to A.A.S.H.O. classificationsystem., soil number 1 is A-2-4 O), number 2 is A-6 (6) and number 3 is A-4 (1).- Standart Proctor method was employed to determine the required water andamount copression for the mixtures. Compressian curves were dawn for eachmixture (Figure 2).• The number 3 mixture propared with the soiI number 1 (containing 18,9% silt and 1i ~~ clay) and 13 % coment dispa1ayed a good durability againstfreezing-thawing and wetting-draying in the laboratory.- The minimum lost in freezing-thawing test were observed at number 3 soilcement mixture (2 %) which prepared soil number i and maximum lost at number1 soil-cement mixture (16 %) which propared soil number 2. The minimum lost inwettig-draying tests w.ere observed at number 3 soil-cement mixture (6 /~) andmaximum .1ost as ,number 1 (37 %) which prepared soil number 3.- Compressed soil-cement mixture could be prepared with casily breakable$oils containing less than 30 %silt and Clay adding B %cement and water atthe opt.imum moisture contant wilt make an economical lining, material for smailwater storage facilities.- PCA (1971, s. 12) gives approximate cement for' soils according to theirA.A.S.H.O. classification system. But the laboratory tests should be undertakenin order to find out economieal cement percent for mixture.