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This study is to examine experimentally on the engineering properties of fiber reinforced concrete using kenaf(KN) fiber and another organic fibers for comparing test, and propose the usable method of KN fiber as an natural fiber in the concrete industry. It is to select 4 contents(0, 0.3, 0.6 and 0.9 kg/m3) of KN fiber and 4 organic fibers (Jute, Cellulose, Polypropylene and Nylon). For this study, it is to perform various tests including slump, air content, plastic and drying shrinkage, flexural and tensile strength, carbonation depth for the fiber reinforced concrete according to contents of KN fiber and 4 organic fibers. The results of this study are as follows : In case of KN fiber contents 0.6 kg/m3, it shows the effective results from increasing concrete strength including flexural and tensile, from decreasing plastic and drying shrinkage, carbonation depth. Also KN fiber is confirmed having excellent performances by comparing with test results of another organic fibers as same contents 0.6 kg/m3. Therefore, considering concrete test results, cost and environment, KN fiber is proposed as the optimum contents in the range of 0.6 kg/m3 and an effective fiber materials, and needs to keep up these study on the site application.

An Experimental Study on the Engineering Properties of Fiber Reinforced Concrete using Kenaf Fibers