KÜÇÜK SU DEPOLAMA REZERVUARLARINDA TOPRAK-ÇİMENTO KARIŞIMLARININ SIZMA KAYIPLARINI ÖNLEMEK AMACIYLA KULLANILMASI

Abstract

OZET Gecirgen topraklar uzerinde insa edilen 'su depolama yapilarin temellerinden as'lrl sizma kayiplari meydana gelmektedir. Ozellikle suya s(ddetli gereksinme duyulan kurak ve yari kurak iklim bolgelerinde buyuk oneme sahip olan bu ,kayiplarm onune, gecmek itin rezervuar tabaninin gecirimsiz bir mazemeyle kaplanmasi gerekmektedir. ' Toprak-cimeto kartsimlar dusuk nwliyetli kaplama malzemesi olarak 20 yt/dan fazla bir zamandan beri su depola~a yapil~rinda basarili bir sekilde uygulanmaktadir, Bu arastirmada, sik/stmlmis toprak-cimelJ/O kartsimIann bu tip yapilarda ekonomik kaplama malzemesi olarak sizma kayiplarim azaltmak icin kullanabilirligi saptanmaya calisilmistir. THE UTILIZATION OF SOIL-CEMENT MIXTURE FOR REDUCING SEEPAGE LOSSES IN THE SMALL WATER STORAGE RESERVOIRS SUMMARY Small water cotaining structures are nOW an important SOUl'ce of irrigation water in the arid and semI 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 law cost lining material for both small and large water storage reservoirs. This study is condueted to determine an economical' lining material in order to prevent seepage losses in the smaIl water reservoir and farm ponds. For this purpore 3 were selected having different texture and Atterberg limits as a base material among the lO soil samples. Pordland cement is used as soil additives to stabilize the soiI. FolJowing conclusion is drown by obtained from the test. - The soils used in this study have common gradiation according sIeve analysis. Liquid timit values of the are between 26,4 %and 31,3 ~~, plastic index values are between. 6,4 %and 14,6 %' Accaordirig to A.A.S.H.O. classification system., 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 and amount copression for the mixtures. Compressian curves were dawn for each mixture (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 against freezing-thawing and wetting-draying in the laboratory. - The minimum lost in freezing-thawing test were observed at number 3 soil cement mixture (2 %) which prepared soil number i and maximum lost at number 1 soil-cement mixture (16 %) which propared soil number 2. The minimum lost in wettig-draying tests w.ere observed at number 3 soil-cement mixture (6 /~) and maximum .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 at the opt.imum moisture contant wilt make an economical lining, material for smail water storage facilities. - PCA (1971, s. 12) gives approximate cement for' according to their A.A.S.H.O. classification system. But the laboratory tests should be undertaken in order to find out economieal cement percent for mixture.