Experimental study of composite materials based on ecological wastes

Abstract

Thermal insulation is a good strategy for saving energy and reducing the emission of CO2 especially when produced locally with ecological materials. The hereby document aims at evaluating the thermal and mechanical properties of eco-composite materials based on plaster and wood waste or granular cork. The proportion of used additives were respectively 20 and 30%. Two wood waste types were used as sawdust and wood chips; several granular sizes were used for granular cork. The thermal characterization consists of determining the thermal conductivity, and thermal effusivity of all samples. Flexural and compressive strength were also tested. Results show that the composite materials with 20% wood shaving, 20% granular cork size 3.35–6.7 mm, and 30% sawdust have improved thermal performance with acceptable mechanical resistances. The thermal simulation proves that using these composite materials as plasterboards in buildings can generate thermal energy gain about 38%, compared to reference building. These results indicate that the use of ecological composites based on plaster has a promising future in thermal building insulation.

Thermal properties and Life Cycle Assessment of new eco-sandwich panel for building thermal insulation

“…Although the availability of cork can be subject to fluctuate due to factors like market demand and regional conditions, its potential contribution to thermal insulation merits consideration in sustainable building practices. Due to its properties, cork has been investigated in several scientific works in the form of granulates (Cherki et al, 2014; Er-rradi et al, 2022; Khabbazi et al, 2005; Maaloufa et al, 2017; Mounir et al, 2014) and agglomerated panels (Amel, 2017; La Rosa et al, 2014; Mir et al, 2011). Mounir et al (2014) investigated the thermal characteristics of the clay-granular cork composite with varying volume percentage of granular cork.…”

“…This paper is an extension to a previous work that investigated composite materials based on ecological wastes (Er-rradi et al, 2022); where three configurations have been validated at thermal and mechanical levels. In the current study, the three composites were used as skin bonded to an agglomerated cork panel.…”