CFRP-confined expansive crumb rubber concrete
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(Published version)
Date
2019
Authors
Hassanli, R.
Youssf, O.
Vincent, T.
Mills, J.E.
Manalo, A.
Gravina, R.
Editors
Smith, S.T.
Yu, T.
Fernando, D.
Wang, Z.
Yu, T.
Fernando, D.
Wang, Z.
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Conference paper
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APFIS 2019 Proceedings: 7th Asia-Pacific Conference on FRP in Structures, 2019 / Smith, S.T., Yu, T., Fernando, D., Wang, Z. (ed./s), pp.1-4
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Seventh Asia-Pacific Conference on FRP in Structures (APFIS 2019) : Gold Coast, Australia)
Abstract
The behaviour of carbon fibre-reinforced (CFRP)-confined expansive rubberized concrete was examined in this research by experimental testing of 9 rubberized concrete-filled fibre-reinforced polymer (FRP) tube (CFFT) columns under axial compression. The effect of rubber content was examined by manufacturing test specimens with 0%, 20%, and 40% volume replacement of sand in the concrete mix designs. The influence of CFRP confinement condition was also examined with specimens prepared with either 1 or 2 layers of CFRP plus confining plates attached to specimen ends during curing. All specimens were cylinders with 100 mm diameter and 200 mm height and confined by CFRP.
Axial and lateral strains were monitored during concrete curing, as lateral pre-stress developed in the FRP shell, plus during the application of axial compression. Pre-stress development over the initial 2-3 days of curing has been reported and axial stress-strain curves during compression have been provided. The results of this study indicate the addition of crumb rubber to pre-stressed CFFTs results in a noticeable loss in the columns' axial stiffness and strength. However, the pre-stress development during the curing stage for the expansive mixes were found to be considerably higher in rubberized concrete specimens compared to the conventional concrete specimens, indicating that expansive agent is more effective in rubberized concrete.
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Copyright 2019 International Institute for FRP in Construction. This work is licensed under the Creative Commons Attribution 4.0 International Licence. (http://creativecommons.org/licenses/by/4.0/)