Effect of Reinforcement Thickness and Content on the Properties of Compressed Earth Blocks

This study explores the mechanical, hygroscopic, and thermal behavior of stabilized and unstabilized compressed earth blocks (CEB) by incorporating date palm wood chips (DPWC) as a natural fiber additive. The investigation covers a range of DPWC thicknesses (1 mm, 2 mm, 3 mm) and content variations (0% to 1% by weight), focusing on the interaction between the bio-based reinforcement and the stabilized soil matrix, which is stabilized with 10% white Portland cement. The mixtures were compressed at a pressure of 5 MPa using a hydraulic press, providing a detailed examination of how these parameters impact the structural integrity and functional properties of CEB. The experimental analysis encompassed a comprehensive set of mechanical tests, including flexural and compressive strength assessments, to understand the role of DPWC in enhancing structural performance under both dry and wet conditions. Additionally, the study evaluated total water absorption and thermal conductivity to explore the multifaceted role of DPWC as a reinforcement. The findings indicate that achieving optimal compressive strength in stabilized blocks necessitated precise calibration of wood chip thickness according to the reinforcement ratio. The flexural strength was enhanced by incorporating wood chips of varying thicknesses in specific proportions. Higher reinforcement content correlated with increased water absorption and reduced thermal conductivity, suggesting potential applications in thermal insulation.