Research Article
Dec 1975
Handling Concrete—Then and Now
Publication: Journal of the Construction Division
Volume 101, Issue 4
Abstract
Progress in mixing, transporting and placing concrete during the period 1925-1975 is traced. The production of ready mixed concrete grew from practically zero to a major segment of the concrete construction industry during the period. Recognition of the importance of the total water content and of the water-cement ratio forced the use of concrete of drier consistency than had been previously used. This led to improvements in equipment for handling the stiffer mixtures. Consolidation or compaction of the concrete by means of vibration was developed and gained general acceptance during this period. Other important changes and improvements in equipment were the use of pumps, including the small line pumps, for transporting concrete, belt conveyors specifically designed to handle concrete, improvements to cranes and buckets, and the introduction of automatic and electronic batching and mixing controls.
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Published In
Journal of the Construction Division
Volume 101 • Issue 4 • December 1975
Pages: 819 - 837
Copyright
© 1975 American Society of Civil Engineers.
History
Published in print: Dec 1975
Published online: Feb 11, 2021
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Authors
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Joseph J. Waddell
Construction Materials Consultant, Riverside, Calif.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.