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The structural performance of four epoxy adhesives has been studied, when subjected to shear in three types of specimen: a steel-steel doublelap specimen, a concrete prism with scarfed joint, and a concrete beam with external steel plate rein forcement. Specimens have been tested under simple and sustained static load, and in fatigue. Cured between 20 °C and 80 °C, the shear strength of adhesion to steel was generally at least 13 N/mm to the power 2, provided that the steel was free from grease, and was not greatly affected by slight contamination with rust, dust or moisture, or by cycling
400 times between - 7 °C and + 35 °C. There was a marked difference in performance of the different adhesives after immersion in water for 8 weeks.
A.R. Cusens and D.W. Smith
The Watt Committee on Energy is seeking to extend its activities through increased
education of both the professional and the layman; its chairman, Mr. J. H. Chesters,
has asked for our support in furthering this campaign which is described in a statement that runs:
Professional institutions have always had as their main objective the maintenance of
high standards within their own particular field. It is now suggested that they should
consider how energy conservation can be further extended through their own field of training.
The paper describes the design and construction of the new bridge over the Thames at Runnymede next to the bridge designed by Sir Edwin Lutyens. Several different types of structure were investigated, and models were used to study the visual relationships with the older bridge. The new bridge consists of four frames of white concrete which were constructed in halves on the banks, slid into position, and joined together.
W.J.R. Smyth, R. Benaim and D. H. Philpott