This is the first of the Memorial Lectures to the late Dr. F. E. Kanthack and the very great privilege of delivering it has fallen to the Author, as occupant of the Kanthack Chair of Civil Engineering at the University of the Witwatersrand . The University is proud to be associated with the Institution in honouring the memory of a man who will probably be recognized in South African history as the country's greatest civil engineer; and it is appropriate that this lecture is being delivered within the University with which he was so closely linked, culminating his association as Chairman of the University Council.
The heat developed, under adiabatic and isothermal conditions, in mortars made from mixtures of Portland cement and milled glassy blastfurnace slag has been studied. The heat of hydration of the cements was calculated from data obtained from mortars and compared with values obtained by means of the heat of solution method.
The paper dealt with experience gained by the Authors on foundations in areas where heaving soils occur and set out the results of their investigations. Recent publications by others on the subject were reviewed. Criteria were proposed to assist in choosing the type of foundation to be used and comparison was made between cast-in-situ tension piles and isolated precast piles.