Assaad, J: Thixotropic Properties of Self-consolidating Conc
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- Englisch ausgewählt
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increased acceptance in the construction industry
due to its high fluidity. It has thus become
essential to better understand the lateral pressure
that can be developed on vertical formworks. The
approach based on assuming that the plastic concrete
exerts full hydrostatic pressure until setting time
results in increased construction costs and limits
the rate of rise of the concrete in the formwork.
This book presents the various parameters affecting
SCC lateral pressure. Variations in pressure are
found to be highly affected by the development of
shear strength properties, namely the internal
friction and cohesion. Higher degree of internal
friction limits the maximum initial pressure
measured right after casting. On the other hand, the
development of cohesion with time was found to
directly affect the rate of pressure drop following
casting. The SCC formwork pressure can well be
estimated by
the magnitude of thixotropy. The higher the degree
of thixotropy, the less the concrete develops
pressure right after casting and the faster is the
rate of pressure drop over time.
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