Feasibility Study of Use of Hemp Rope as Reinforcement in Structural Elements

Abstract

This was an industrial project, with the main emphasis on the evaluation of various properties of Hemp rope to verify its suitability for use as a replacement of steel reinforcement in structural elements. Steel has long been used as a reinforcement in structural elements but it has certain drawbacks. This quest for a sustainable and a green alternative lead us to Hemp rope. A Hemp rope is made from fibers of Hemp plant. Hemp fibre is one of the longest and strongest of the natural fibers. The long fibers of the Hemp plants are twisted, braided or wound together to form a long rope of various thickness. For thousands of years Hemp was traditionally used as an industrial fiber. Sailors relied upon Hemp cordage for strength to hold their ships and sails. One of the most significant characteristic of the Hemp ropes is their strength. Besides the production of Hemp rope being environmentally friendly and a rather convenient process, it exhibits high tensile strength. In this study, we assessed different properties of the Hemp rope to verify its suitability for usage as a replacement of steel reinforcement in structural elements in single-story residential buildings. Tests for its tensile strength, modulus of elasticity, water absorption, effect of water absorption on its properties, and flexural strength were conducted using ropes of 3 different diameters. Results from these tests suggest that Hemp rope of diameter 1 in or more can be used as a reinforcement in place of steel rebars in single-story structures.