Abstract
Natural fibers as reinforcement can be an alternative material with an environmentally friendly profile. The aim of this work is to determine the potential of Indonesian Ramie fiber, as a reinforcing material in cement mortar, by exploring new twisting ideas for natural fibers and the impact of twisting techniques on tensile strength. Long fibers are arranged in four cross-sectional areas and also in different numbers of constituent layers, as 2 ply and 3 ply. The spinning process contributes to the final yarn result which the process is carried out in the same direction for each ply, but to unite each ply it is necessary to rotate the direction of rotation and the direction of the single fiber yarn (opposite way). Twisted Ramie fiber yarns were tested for tensile strength using the Universal Testing Machine (UTM). It showed that comparing at the same weight of 24 gr twisted yarn, 3 ply twisted yarn shows the highest tensile strength value as much as 110,32 MPa than 2 ply as much as 96,56 MPa that indicates that the number of ply affects the tensile strength of the yarn.
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