Effect of re-vibration process on axial capacity of short reinforced concrete circular columns
A considerable amount of research work has been performed on the effects of vibrating of fresh concrete on the reduction of shrinkage and creep, the improvement bond stress between reinforcing bar and concrete, reduction the concrete permeability and improvement of the mechanical properties of concr...
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Published in | Engineering and Technology Journal Vol. 35; no. 7A; pp. 776 - 787 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Baghdad, Iraq
University of Technology
01.07.2017
Unviversity of Technology- Iraq |
Subjects | |
Online Access | Get full text |
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Summary: | A considerable amount of research work has been performed on the
effects of vibrating of fresh concrete on the reduction of shrinkage and creep, the
improvement bond stress between reinforcing bar and concrete, reduction the
concrete permeability and improvement of the mechanical properties of concrete
(tension and compression). Series of tests on reinforced concrete circular column,
cubes and cylinders were carried out to study the effect of re-vibration duration on
axial strength of column, compression strength of concrete cubes, and tensile
strength of cylinders. Different compressive strengths of concrete and different size
of aggregate were considered in this investigation. The test results show that, the
re-vibration operation improves the tensile and compressive strength of concrete.
The stiffness of columns increased with increasing the re-vibration duration up
to1.5 times the initial vibration duration. Size of aggregate has significant effect on
the improvement properties of concrete due to re-vibration. Increase the time
duration of re-vibration delay the appearance of first crack. |
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ISSN: | 1681-6900 2412-0758 |
DOI: | 10.30684/etj.35.7A.15 |