Cation Exchange Capacity of Clay in Greece
The soil samples which have been used to determine the C.E.C. of the Greek swelling soil, were collected from 17 districts all over the country, and the ammonium acetate method (Schofield, 1949) was used because is a commonly used method by Chemists. 54 clay soil samples were tested using the material passing the U.S. sieve No 40. Each sample was washed three times with ammonium solution to saturate the exchange sites and the exchange ions in milliequivalents per 100 gr of dry soil were determined in the leached extract by a corne flame photometer. The soil pH determination was also measured according to BS 1377: Part 3: 1990 9: The results of the measurements from 300 soil samples of the Greek territory are reported. Additionally, one attempt was made to correlate the obtained C.E.C. values with Liquid limit, Plasticity index and montmorollonite percent.
