INVESTIGATION OF MIX COMPOSITION HEMP CONCRETE ON TRANSPORT PROPERTIES, MECHNICAL PROPERTIES AND DURABILITY

Author(s): S. Glass, M. Sonebi
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference
on Bio-Based Building Materials
Editor(s): Sofiane AMZIANE, Mohammed SONEBI and Karine CHARLET
ISBN:
e-ISBN: 978-2-35158-192-6
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 509-517
Total Pages: 4
Language : English

Abstract: Hemp concrete is an organic based building material. It is relatively new and unused in the
construction industry due to the lack of standardised testing. The material has acoustic and
thermal advantages compared to conventional concrete and is more sustainable.
The aim of this project is to investigate the mechanical performance and durability of hemp shiv
concrete. This includes the influence of type of binder and parameters of mix composition on the
carbonation, capillary absorption, drying shrinkage, weathering and mechanical performance of
hemp concrete. Two types of binder were used; Vicat Prompt Cement and Hydraulic Lime for
three mix compositions; floor, render, shuttered wall. The variables of mix composition were the
contents of hemp aggregate, binder and water content.
Tests were carried out over a two months and changes in mass of samples monitored at
intervals; drying shrinkage and weathering every 2 days, capillary absorption at 14 days and 28
days, carbonation and mechanical performances at 2 months. The results of these tests were
compared against control samples, kept in temperature controlled room for the same time.
Results show that carbonation of hemp increased the compressive strength. Vicat Prompt binder
mixes had a better durability performance; higher compressive strength due to the carbonation
and lower reduction due to the weathering tests. Hydrated lime binder had higher compressive
strength but experienced greater reduction due to the weathering cycles. Hydrated lime mix
properties are related to hemp/water ratio. Capillary absorption was influenced more with mix
composition than binder content.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00