Lateral Pressure of Fresh Concrete

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Title: Lateral Pressure of Fresh Concrete

Author(s): N. J. Gardner and P. T.-J. Ho

Publication: Journal Proceedings

Volume: 76

Issue: 7

Appears on pages(s): 809-820

Keywords: concrete construction; formwork (construction); fresh concretes; lateral pressure; loading rate; loads (forces); placing.

Date: 7/1/1979

Abstract:
An experimental investigation was carried out to determine the variation of the envelope of lateral pressure exerted by wet concrete with (1) rate of placing, (2) strength of ocncrete, (3) slump and consistency of concrete, (4) formwork size, and (5) the yielding of formwork. It was observed that the envelope is essentially "hydrostatic" up to some limiting value and thereafter constant. Increase in rate of placing and increase in slump increase the maximum lateral pressure. Aggregate size and concrete strength have only a minor effect on the lateral pressure. Formwork yielsding significantly reduces the lateral pressure. Arching has a significant effect in limiting the lateral pressures for the dimensions and rates of placing used in the study.