Title:
Pressure of Concrete Against Formwork
Author(s):
N. J. Gardner
Publication:
Journal Proceedings
Volume:
77
Issue:
4
Appears on pages(s):
279-286
Keywords:
concrete construction; formwork (construction); fresh concretes;
hydrostatic pressure; lateral pressure; loads (forces); placing; plasticizers;
pressure; slump tests; structural design; temperature; vibration; vibrators (machinery).
DOI:
10.14359/7006
Date:
7/1/1980
Abstract:
The paper reviews the currently accepted design equations concerned with the lateral pressure of fresh concrete against vertical form faces and discusses the various factors that influence the lateral pressure; namely, vibration, rate of placing, minimum form dimension, concrete slump, and concrete temperature. The paper also reports experimental results obtained at the University of Ottawa on a large instrumented form. From the experimental results a design lateral pressure equation was developed. The experimental results are compared with the results predicted by the proposed equation and the accepted CIRIA and ACI equations.