Calendar: 1970-1971 Page 430

Annual Report of the Delegacy lv British delegation to the seventh conference of the International Society of Soil Mechanics and Foundation Engineering in Mexico City Dr Alston lectured at an advanced course on concrete techno- logy at the Cement and Concrete Association and introduced dis- cussion on 'Projects in engineering education' at the Institution of Civil Engineers The department played prominent part in an international conference on' Structure solid mechanics and engineering design' at Southampton with Mr Dougill Dr England and Dr Illston each presenting paper Dr England staged special exhibit at the conference illustrating particular aspects of his research He also presented paper at conference organised by the British Society of Rheology in March 1969 The Materials Division of the Concrete Society visited the College in July 1969 to inspect the research in progress Seminars were con- ducted and it was evident that the Society found much of interest in what they saw and heard The department also welcomed many indi- vidual visitors including Mr Bozinhov of the Ministry of Building Affairs Sofia and Mr Crawley of the University of Adel- aide both of whom spent period of study-leave in the department Special thanks are due to the Visiting Professor of Civil Engineering Professor de Josselin de Jong who has completed two years in this office His lectures and seminars were great source of interest and stimulation The department is also grateful to those eminent civil engineers in practice who lecture to undergraduate and postgraduate students and staff Research activity continued at high level The project supported by the Science Research Council on the effects of time and temperature on concrete and concrete structures was started with an examination of torsional creep under constant and variable temperatures In associa- tion with the experimental work novel and powerful analytical methods were developed to assist the estimation of the effects of time and temperature on heated structures The first stage of the research on the creep of concrete under multi-axial stresses was completed and results will be published in due course further work in this area is now under way Research continued in the field of continuum mechanics on problems of non-homogeneous elasticity and theory on the consolidation of clays Studies were pursued into the effect on the permeability of clay caused by the inclusion of sands and gravels topic of practical importance in the construction of dams The