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Pro033

Pressure of self-compacting concrete on the formwork



Title: Pressure of self-compacting concrete on the formwork
Author(s): A. Leemann, C. Hoffmann
Paper category : conference
Book title: International RILEM Symposium on Self-Compacting Concrete
Editor(s): O. Wallevik and I. Nielsson
Print-ISBN: 2-912143-42-X
e-ISBN: 2912143713
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 288 - 295
Total Pages: 8
Nb references: 17
Language: English


Abstract: Three mixtures of self-compacting concrete with varying workability are cast from the top of a formwork. They display between 87 and 90% of the hydrostatic pressure at the lowest sensor. The pressure starts to decrease as soon as the concrete is not in motion anymore. Therefore the casting speed and the rate of the continuos pressure decrease influence the resulting pressure on the formwork. A reference mixture made of conventional concrete reaches 55% of the hydrostatic pressure after being poured into the formwork. During vibrating the pressure rises to hydrostatic values. SCC pumped into a formwork through a valve at its base is in constant motion during casting resulting in a hydrostatic concrete pressure. Because the pump adds more pressure hydrostatic values can be exceeded locally.


Online publication: 2003-08-21
Publication type : abstract_only
Public price (Euros): 0.00