Author: Evans, R H
First published: N/A
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Evans, R H
SIR,-It is rather late in the day to draw your attention to the article on "Structural
Engineering in South Africa" which appeared in the Royal Charter issue of the journal last January, but I have waited until I could send the enclosed photographs.
THE physical properties of concrete depend primarily upon the cementing material and aggregates of which it is composed. The methods and operations used in the making of concrete are vital factors in the production of conditions affecting the density, strength and permanence of the concrete mass. This paper has for its object the following:-
THE following article is intended to act as a summary of the main principles on which
strain energy theorems are based. It is of an elementary nature, but may serve as an introduction to more advanced considerations.