Hygric Behavior of Viticulture By-Product Composites for Building Insulation.

Céline Badouard,Christophe Bliard,Guillaume Polidori,Chadi Maalouf,Fabien Bogard

doi:10.3390/ma15030815

Abstract

One possible approach to reducing the environmental impacts associated with the building sector is the development and use of bio-based building materials. The objective of this study is to determine the water properties of bio-based insulation materials, derived from winegrowing co-products, which promote energy efficiency. The water performance of these new bio-based materials is based on the measurement of the moisture buffer value, the sorption isotherm, and the water vapor permeability. Four by-products are analyzed: stalks, grape pomace, crushed stalks, and skins; they are combined with a potato starch binder. The performance of these composites is compared to two other bio-based composites (hemp/starch and beet pulp/starch). The stalk/starch composite can be classified as a hygroscopic and breathable material with excellent moisture retention capacity.

Highlights

IntroductionThe construction industry is the largest energy consumer in the European Union (about 31% of total energy consumption) and the main sector responsible for greenhouse gas emissions (about 23% of total EU carbon dioxide emissions) [1]
The construction industry is the largest energy consumer in the European Union and the main sector responsible for greenhouse gas emissions [1]
The values obtained in this study are intermediate between the hemp/starch (H/S) composite [17] and the beet pulp/starch composites (BP/S) [18]

Summary

Introduction

The construction industry is the largest energy consumer in the European Union (about 31% of total energy consumption) and the main sector responsible for greenhouse gas emissions (about 23% of total EU carbon dioxide emissions) [1]. According to ÜrgeVorsatz et al [2], the energy demand for heating and cooling could be reduced by almost half by 2050 compared to 2005 levels by applying today’s best energy-efficient technologies. To best respect this commitment, France has put in place a new environmental regulation for energy transition for the building sector. At the end of 2021, this new environmental regulation (RE202) will propose requirements in this direction by significantly improving the insulation performance of new buildings; by promoting low-emissive construction methods, carbon-free energies, and bio-based building materials; and, by integrating a summer comfort objective to adapt buildings to global warming [3]

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Conclusion