Title: Study of Green FRCM Systems Made of Lime-Based Matrix and Hemp Fibers

Author(s): Jacopo Donnini and Valeria Corinaldesi

Publication: Symposium Paper

Volume: 326

Issue:

Appears on pages(s): 113.1-113.10

Keywords: fiber reinforced mortar; FRCM; hemp fiber; natural fiber; strengthening

DOI: 10.14359/51711096

Date: 8/10/2018

Abstract:
This work aims to investigate about the mechanical behavior of sustainable composite systems made of lime-based matrix reinforced with different kinds of natural hemp fibers. Two different kinds of hemp fibers have been used: short hemp fibers with different lengths and hemp fiber bidirectional fabrics. The same lime-based mortar has been used as matrix. Fiber reinforced mortars (FRM) were characterized in compression and three points bending tests, after 28 days of curing. Fabric Reinforced Cementitious Matrix (FRCM) with bidirectional hemp fabric were characterized through double shear bond tests on clay brick substrates. The effectiveness of using a latex coating on the hemp fibers surface (both short fibers and fabrics) to improve mechanical and durability properties of these systems was also investigated. Durability is one of the critical issues that could limit the use of natural fibers, especially when embedded within an inorganic lime-based or cementitious environment. Several attempts have been made to try to improve fibers durability in aggressive environments. In this work a latex coating was applied to the hemp fibers to improve adhesion between fibers and mortar and overcome the possible degradation of the fibers within the inorganic matrix.