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

Abstract

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 ㎏/㎥) 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 ㎏/㎥, 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 ㎏/㎥. Therefore, considering concrete test results, cost and environment, KN fiber is proposed as the optimum contents in the range of 0.6 ㎏/㎥ and an effective fiber materials, and needs to keep up these study on the site application.

Mechanical and Durability Properties of Latex-Modified Hybrid Fiber-Reinforced Roller-Compacted Rapid-Set Cement Concrete for Pavement Repair

“…Jute has been shown to provide excellent crack control and an overall improvement in durability when added to concrete as a non-structural fiber. Recently, it has been widely used in Korea to control shrinkage cracks in concrete pavements, slabs, and parking lots [ 23 ]. Therefore, in this study, structural synthetic fibers and natural jute fibers were selected as materials for improving the performance of latex-modified hybrid fiber-reinforced roller-compacted rapid-set cement concrete (hereinafter referred to as LMHFRCRSC) for emergency repair of concrete pavements in consideration of the characteristics of concrete pavements exposed to corrosive environments such as de-icing materials.…”