Joao Candido Campos
Petrobras
D. W. Hilchie
Colorado School of Mines
ABSTRACT
The object of this research was to determine the degree of increase in cation exchange capacity of rocks, as measured in the laboratory, with various amounts of disaggregation of the sample. Twenty different samples of known composition were ground to pass through sixteen, forty, sixty, one-hundred and forty, and three-hundred and twenty-five sieves.
Reported in this paper are the increases of cation exchange capacity with increased disaggregation of the twenty samples and the wet chemistry laboratory technique used to determine the cation exchange capacity of the samples. The data show that the absolute
increase in cation exchange capacity is greater for rocks which contain predominantly smectite clays than for kaolinite and illite clays.