Improvement of thermomechanical properties of porous plaster reinforced with a network of Morocco sheep wool skeletons for Energy efficiency

• Published in: Building and environment Vol. 234; p. 110171
• Main Authors: Atbir, Aziza, Khabbazi, Abdelhamid, Cherkaoui, Moha, Ibaaz, Khalid, El Wardi, Fatima Zohra, Chebli, Samira
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15-04-2023
• Subjects: Buildings' thermal comfort; Ecofriendly material; Energy efficiency; Porous plaster; Sheep wool fiber; Thermomechanical behavior; Ecofriendly material; Energy efficiency; Thermomechanical behavior; Buildings' thermal comfort; Sheep wool fiber; Porous plaster
• ISSN: 0360-1323; 1873-684X
• DOI: 10.1016/j.buildenv.2023.110171

This study investigates a thermal insulation material for energy efficiency in buildings from sustainable and renewable sources by developing porous plaster and reinforcing it with a networks of sheep wool yarns skeleton as insulating multilayer material. This technique allows us to obtain an optimum between thermal and mechanical properties, with lower CO2 emissions than conventional energy sources. In this research, a statistical study was carried out on thermal and mechanical characterizations. The optimal point of the thermomechanical properties was verified. Next, a dynamic simulation was performed using TRNSYS. The characterizations of the developed composite reinforced with wool fibers showed a performance in thermal properties and good behavior in flexion, where the compression side considerably decrease. Thermal analysis shows the conductivity gain varies from 40% to 52%. effusivity gain from 26% to 39%, and diffusivity gain from 42% to 60%. Mechanical characteristics analysis gives increase of flexural strength gain from 30% to 74%. And decrease in compressive strength from 48% to 71%. The samples' density decreased with increasing wool fibers, with a gain variation of 40%–48%, for PS to PS4L, respectively. This manuscript is part of an experimental evaluation and improvement of the thermomechanical behavior of porous materials for thermal comfort with low energy consumption.
•The durable material for thermal, flexural, and compressive bricks of porous plaster reinforced by a network of sheep wool technique was developed.•Increasing of wool layers in the composite improves the thermal behavior and flexural strength and slightly affects the compressive strength.•The different thermomechanical parameters were checked to verify the optimal composite, which obtains thermal gains and does not waste mechanical ones.•Dynamic thermal simulations were performed for the optimal sample. And the gain varies from 40% to 48.5%.