Exploring the reclaimable potential for the reuse of earth blocks

Abstract

Earth block masonry shows considerable potential as a low-impact alternative to conventional masonry systems. However, research is lacking about the circularity and end-of-life scenarios of EBM. Practitioners often claim the high circularity of demolition and recycling, not considering the possibility of deconstruction and reuse. Therefore, this study aims to fill this gap by evaluating the reclaimable potential for the reuse of earth blocks. The reclaimable potential is evaluated by measuring the bond strength and by qualitatively evaluating the cleaning process for earth block masonry couplets with different mortar compositions. The results show that earth blocks may have high reclaimable potential for reuse. The block type and binder type of the mortar highly affects the bond strength, as well as the moisture content of stabilised earth blocks. Geopolymer-stabilised earth mortar shows the highest labour intensity in the cleaning process and cement-stabilised mortar the lowest. Wetting the walls before deconstruction may be a potential strategy to facilitate the reclaiming of earth blocks. These outcomes underline the importance of considering deconstruction and reuse as a potential circular strategy for EBM. Future studies are needed for in-depth examination of the effect of water and binder on the bond strength of earth block masonry.