The symposium on Dispersive Clays, Related Piping, and Erosionin Geotechnical Projects was presented at the Seventy-ninth AnnualMeeting of the American Society for Testing and Materials held inChicago, Ill., 27 June - 2 July 1976. Committee D18 on Soil andRock for Engineering Purposes sponsored the symposium. J. L.Sherard, consulting engineer, and R. S. Decker,Hoskins-Western-Sonderegger, Inc., presided as symposiumco-chairmen and editors of this publication.