Development of test method for bond strength between kenaf reinforcement bars and concrete
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Date
2011-04-01
Authors
Lim Hooi Fuang
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Abstract
The integration of corrosive resistance material such as Kenaf reinforced bars as reinforcement in concrete members will benefit precast concrete industry besides suit to green environmental concept. The cost of repair and rehabilitation due to corrosion of steel reinforcement in concrete structure can be reduced with the uses of Kenaf reinforced bars. The study deals with an experimental work to develop methods for the pull out test for the Kenaf reinforced bars. The bond strength between the Kenaf reinforced bars and concrete is studied. As surface condition of Kenaf bars is rather smooth, it will have gripping problem while being pulled out by the testing machine. In the research work, there are three methods have been proposed to do the pull out test for Kenaf reinforced bars which are hook method, rubber method and two-side concrete block method. The obtained results then will be justified by the use of high tensile steel by refer to the BS 8110: Part 1: 1997. From the pull out test result, it shows the inconsistency behavior for the hook method and rubber method due to the slipping problem occurring during test. However, this problem does not happen in two-side concrete block method method. It shows the consistency in term of results for both high tensile steel and Kenaf reinforced bars. The results of the test indicate that bond strength of Kenaf reinforced bars much lower than high tensile steel.