Reclaiming earth blocks using various techniques

Abstract

Earth block masonry offers a low-impact alternative to conventional building methods. Despite the growing need for circular construction practices, the reuse of earth blocks remains underexplored. This initial study addresses this gap by empirically assessing the reclaimable potential of various earth block masonry configurations. Moulded non-stabilised and compressed cement-stabilised earth blocks are combined with three types of mortar. Ten sample walls and a prototype partitioning wall are deconstructed, and blocks are cleaned using standard tools. Reusable and damaged fractions are measured quantitatively, while qualitative evaluations gauge the effort and speed of the processes. Findings reveal that both earth blocks combined with earth mortar exhibit high reclaimable potential, followed by walls with an earth adhesive mortar. Conversely, walls with bastard mortar containing earth show low reclaimable potential, making them more suitable for demolition and recycling. These outcomes contribute to the ongoing discourse on end-of-life scenarios for masonry, providing a foundation for life cycle assessment considering earth block reuse. Further research is initiated to correlate earth block masonry bond strength with suitable reclamation techniques. Other research tracks worth exploring are economic and organisational challenges associated with earth block reclamation.