Intentional Vulnerability of Earthen Structures: Strategic Assembly of Interlocking Non-Stabilized Compressed Earth Blocks
Research Poster Engineering 2025 Graduate ExhibitionPresentation by Mahan Motalebi
Exhibition Number 104
Abstract
Through exploring intentional vulnerability and planned obsolescence in earthen construction, the presented research attempts to develop a durability/vulnerability spectrum for non-stabilized earthen blocks to promote true circularity in earthen construction. It focuses on the integration of intentional vulnerability into earthen construction, including compressed earth block prototypes designed to accelerate the deterioration process in areas of the block most vulnerable to decay. This involved subjecting compressed earth blocks with various geometries and firing methods to natural/environmental decay agents as a means to explore, observe, and understand their decay rate. The effectiveness of the designed blocks, with specific geometries and varying material mixtures and durability rates, is assessed by studying their behavior in different assembly configurations and environmental settings. The study focuses on the strategic assembly of decay-informed compressed earth blocks in earthen structures (wall) to provide a method of construction for earthen structures with graded durability. The research is informed by the vernacular wisdom of earthen architectural precedents, specifically Iranian pigeon towers. It examines their functionality, materiality, and construction methods, as well as their connection to the context and local environment to establish a profound point of reference and foundation for its material and tectonic explorations. The "Intentional Vulnerability of Non-Stabilized Interlocking Compressed Earth Blocks" can inform environmentally focused building and material industries by offering sustainable and culturally rich alternatives to buildings and products overly invested in durability. Ultimately, the cyclical adaptability of earthen structures designed with planned obsolescence is enhanced, as the complete building cycle—from earth to earth—can be anticipated.
Importance
The intentional vulnerability of non-stabilized interlocking compressed earth blocks proposes an alternative that aligns with the growing demand for sustainable building solutions and material circularity. This approach addresses the pressing environmental challenges faced by the construction industry such as excessive material extraction, materials production with an exaggerated and obsessive focus on durability. It also paves the way for a future where buildings harmonize with, rather than harm, the natural world by exploring how the physical properties of earth as a building material and construction methods related to it can be implemented in the design and manufacturing of intentionally vulnerable compressed earth blocks.
DEI Statement
The research challenges conventional, resource-intensive building norms by advocating for more accessible, place-based, and culturally responsive construction methods. By studying Iranian pigeon towers and their vernacular wisdom, it highlights the value of indigenous knowledge, promotes inclusivity in architectural discourse, and emphasizes the importance of cohabitation with other species.