Published: Jan 1951
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Clear-cut concepts readily applicable to the everyday problems of structures composed of granular materials have been relatively slow to develop, in comparison with knowledge of the mechanics for the more homogeneous materials of construction. This is due in part to lack of suitable experimental techniques by which to explore and evaluate such theory as has been evolved. In recent years, an accelerated groping for means of controlling the behavior of granular mixtures has led to a vast amount of experimentation and the accumulation of much uncoordinated data. In a sense, this accumulation of information has outstripped the capacity of existing theory to explain. It seems most timely, then, that attempt should be made to take stock of theoretical concepts, experimental procedures, and performance records and to assess their significance as a basis for further development. During the past two decades, independent but almost parallel lines of thought have developed among those who have been concerned with soils and among those who have been concerned with bituminous mixtures. In keeping with the symposium idea, wherein each participant contributes by presenting his views or experiences on the central theme, an attempt is made to summarize in this paper some of the thoughts, doubts, and developments which have come out of the exchange of ideas and cooperative efforts of a small group of men on the West Coast who have been debating the problems of stability of bituminous mixtures.
Hveem, F. N.
Construction Engineer, California State Division of Highways, Sacramento, Calif.
Davis, Harmer E.
Director, University of California, Berkeley, Calif.
Paper ID: STP48406S