Biomasonry products from macroalgae: a design driven approach to developing biomaterials for carbon storage

Abstract

Lowering the embodied carbon of building materials requires a transition away from fossil derived products towards bio-based alternatives, alongside the design and development of new clean tech biomaterials that can function as carbon sinks. This paper explores gaps and opportunities for the development of seaweed-based construction materials that can support atmospheric carbon removal through algal photosynthesis and provide carbon storage solutions within the built environment. Utilising a biorefinery framework our research aims to valorise residual seaweed biomass where it’s being grown for waste-water management and to identify value-added opportunities for this seaweed by-product. We present as a case study the design of seaweed ‘biobricks’ and the construction of a 1:1 scale prototype, demonstrating what biomasonry products from macroalgae can look like. Our paper highlights the value of interdisciplinary methodologies that combine materials science with design research, and the role of design prototypes in showcasing novel biomaterials and new sustainable forms of biodesign.