By using the grey correlation method

the experimental data of chemical ingredients and slaking index are analyzed. Analysis show that the unstable clay minerals always have the highest influence on the slake property of soft rock; and different chemical ingredients have different influences on the slake property. Pure water

sodium chloride

calcium chloride and ferric chloride solutions are used as a slaking fluid to test the slaking property of a selected specimen. Results show that the selected specimens have greater slake intensity in pure water while less in the three selected salt solutions

especially in calcium chloride solutions. Based on those analysis and study

the slake control method of red beds soft rock used in road construction is to water on the red beds soft rock before construction to fast its slake and mix lime to soft rock when construction to depress its slaking.