Performance Of Blended Cement SCC Filled
Steel Tubes For Repair/rehabilitation Of
Structural Columns Of Buildings, Bridges And
Deep Foundations
Author(s)
T. Kibriya & M. Iqbal
Abstract
Research on structural performance of confined self-consolidating concrete tubes
as columns is scarce and there is little data available. Similarly, there is little
research on use of blended cement containing agricultural waste, i.e. rice husk
ash as cementitious material in normal/high strength concrete. Limited research
has shown better performance of such blended cements with increased strength
by up to 30% and improved durability, reduced permeability and shrinkage. Its
behaviour under confined conditions is still to be studied. This paper provides
valuable research in this area with special focus on the use of blended cement
SCC confined in steel tubes applicable for rehabilitation/replacement of columns
of old bridges and buildings as well as in deep foundation applications. This
paper presents an experimental study on the behaviour of short, SCC, with
blended cement containing 75% ordinary Portland cement and 25% rice husk
ash, filled steel tubular columns axially loaded in compression to failure and
compares the results with testing on similar hollow tubes and tubes filled with
normal concrete. Almost 350 to 460% increase in strength was observed by
filling steel tubes with SCC (containing blended cement) in square and circular
tubes respectively. Failure strains were also reduced by 40 to 45%. Smaller steel
sections and use of blended cement containing rice husk ash reduces the costs of
repairs/renovation works along with reducing the disposal problems of this
massively produced agricultural waste in the rice growing regions.
Keywords: blended cement, rice husk ash, concrete filled steel tubes,
repair/rehabilitation works.
Keywords
blended cement, rice husk ash, concrete filled steel tubes,
repair/rehabilitation works.
Related Book
Other papers in this volume
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