Properties of a thermal-insulating wall material based on hemp shives and lime binder

作     者：Przemysław Brzyski Grzegorz Łagód Zbigniew Suchorab 

作者机构：1Department of Construction Faculty of Civil Engineering and Architecture Lublin University of Technology Nadbystrzycka 40 20-618 Lublin Poland 2Department of Water Supply and Wastewater Disposal Faculty of Environmental Engineering Lublin University of Technology Nadbystrzycka 40B 20-618 Lublin Poland 

出 版 物：《AIP Conference Proceedings》 

年 卷 期：2019年第2170卷第1期

学科分类：07[理学] 0702[理学-物理学] 

摘      要：The use of low-processed materials is a requirement for building in accordance with sustainable development. The examples of such materials are the components of plant origin – cellulose fibers, cereal straw and hemp/flax shives. Their carbon footprint is often negative since they absorb large amounts of carbon dioxide from the atmosphere during the plant growth. These materials are employed for thermal insulation or as a material for walls. Recently, hemp shives have enjoyed growing popularity in the production of lime-based composite, used for filling walls in timber frames. Owing to high porosity, the shives improve the thermal insulation properties characterizing the composite. By changing certain parameters, for instance the hemp shives to binder ratio, it is possible to modify the physico-mechanical properties of a composite; in contrast, the properties characterizing the hydrated lime binder can be altered using additives. The paper presents mechanical properties (compressive strength) as well as physical properties (density, porosity, thermal conductivity coefficient, absorptivity) of composites with various proportions of hemp shives of the Bialobrzeskie variety to the lime binder modified with gypsum and metakaolinite.