Concrete Architecture: A Lost Opportunity?

2020 ◽  
Vol 63 ◽  
pp. 257-282
Author(s):  
David Yeomans

AbstractWhen reinforced concrete was first used in Britain for framed buildings, it was treated in the same way as steel — that is, in terms of a simple grid of columns and beams. It took some time for one of the advantages of reinforced concrete to be realised, namely that it could be handled as a series of planes with walls and floor plates, which overcame the problem of intrusive beams and columns in domestic interiors. This essay explores the causes of this delay, as well as the work of the engineers who introduced architects to the architectural possibilities of reinforced concrete. In the immediate postwar years, when reinforced concrete was favoured over steel, there was a return to simple grid structures.

2019 ◽  
Vol 26 (4) ◽  
pp. 197-208
Author(s):  
Leo Gu Li ◽  
Albert Kwok Hung Kwan

Previous research studies have indicated that using fibres to improve crack resistance and applying expansive agent (EA) to compensate shrinkage are both effective methods to mitigate shrinkage cracking of concrete, and the additions of both fibres and EA can enhance the other performance attributes of concrete. In this study, an EA was added to fibre reinforced concrete (FRC) to produce concrete mixes with various water/binder (W/B) ratios, steel fibre (SF) contents and EA contents for testing of their workability and compressive properties. The test results showed that adding EA would slightly increase the superplasticiser (SP) demand and decrease the compressive strength, Young’s modulus and Poisson’s ratio, but significantly improve the toughness and specific toughness of the steel FRC produced. Such improvement in toughness may be attributed to the pre-stress of the concrete matrix and the confinement effect of the SFs due to the expansion of the concrete and the restraint of the SFs against such expansion.


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