Chemical and multi-physical characterization of agro-resources’ by-product as a possible raw building material

Abstract

The aim of this paper is to find out the best valuation of agro-resources' by-products as new alternative raw building materials that meet to sustainable development requirement. Five agro-resources are considered: flax, hemp, corn, rape and wheat. In the present work, the chemical characteristics of bio-aggregates are studied by FTIR, Van soest method and Phenol sulfuric method to identify their composition. The investigated physical properties are particle size distribution, density, porosity, water absorption, thermal conductivity and moisture buffer value. The studied materials differ on a chemical and a thermal point of view while they all are excellent hygric regulators. These results suggest that agro-resources can be used as a raw building materials for several types of use: as lightweight aggregates or as binder.

Comparative moisture and heat sorption properties of fibre and shiv derived from hemp and flax

“…1). The materials and mechanical de-fibering process used are as reported by Viel et al (2018). The fibres were composed of bundles containing surface defects such as kink band and microcracking, whilst the shiv exhibited a more regular shape with a smoother surface topography.…”

“…This paper aims to study the effects of the microstructure, chemical composition, pore size distribution and porosity on the hygroscopic behaviour of fibre and shiv. In addition, the moisture sorption properties (sorption Table 1 Chemical composition of selected fibre and shiv (Garcia et al 1998;Bledzhi and Gassan 1999;Vignon et al 1995;Ross and Mazza 2010;Kostic et al 2008;Kymäläinen and Sjöberg 2008;Viel et al 2018 isotherms) and the enthalpy of heat sorption were evaluated for both shiv and fibre of flax and hemp during the sorption process.…”

Evaluación de la Pérdida de Calidad Mecánica de Tres Fibras Naturales como Alternativa de Tutorado en el Cultivo de Arveja (Pisum sativum L.)

“…El porcentaje de humedad se midió utilizando un determinador electrónico (Versión 1.1, Kern DBS, KERN y Sohn GmbH, Alemania), en el cual se empleó 100 ± 0.01 g de muestra. Las pruebas composicionales fueron realizadas en los laboratorios especializados de la Universidad de Nariño por los métodos Van Soest Secuencial Oxidación KMnO4 para el caso de lignina, y Van Soest Secuencial para el caso de celulosa y hemicelulosa y en todos los casos por técnicas Gravimétricas (Viel et al, 2018 Se usó un texturómetro (LS1, LLOYD, USA) al cual se le incorporó unas mordazas de agarre especiales para fibras, se evaluó la carga máxima, elongación y Módulo de Young según la metodología descrita por Mina (2012), siguiendo la norma ASTM D-3822-07 en la cual se sujetan 100 mm de cada fibra a las mordazas del equipo. Las pruebas mecánicas se realizaron por triplicado a una velocidad de 5 mm/min, rango de carga de 1000 N, pre-carga de 1 N y longitud entre mordazas de 100 mm.…”

Improvement of Water Resistance of Hemp Woody Substrates through Deposition of Functionalized Silica Hydrophobic Coating, While Retaining Excellent Moisture Buffering Properties

“…Their relative quantities vary depending on the species of hemp, where, and how the plant was harvested: the soil, climate, retting process, and measuring methods, all can affect the given compositions (Thomsen et al 2005;Nykter 2006). The hemp shiv provided by Cavac Biomatériaux and used in the work reported in this thesis were characterised by Viel et al (2018) via the Van Soest method.…”