Ian De Los Santos
Research Mentor: Mohsen Vatandoost
Mentor Department: Not Available, AUP
Author(s): Ian De los Santos, Mohsen Vatandoost
Session: Session 7 (4:00 PM – 4:50 PM)
Presentation Type: Poster 53
Abstract
Concrete remains the most widely used construction material globally, yet its environmental impact is substantial. The construction sector contributes approximately 7–11% of global CO2 emissions from building materials and consumes over 40 billion tonnes of raw materials annually, making it one of the most resource-intensive industries. Addressing this challenge requires not only reducing material consumption but rethinking how waste can be reintegrated into structural systems. This project investigates a combined strategy of bio-based 3D-printed formwork and enhanced concrete composites to reduce environmental impact while maintaining structural performance. The central research question is how bio-based fabrication methods and waste-derived material systems can be integrated into a viable construction workflow. To address this, two parallel investigations were conducted. The first focused on identifying an optimal bio-based filament for 3D-printed formwork. A comprehensive literature review was complemented by experimental validation using a robotic fabrication setup (KUKA arm), where printed specimens were tested through structural evaluations, including three-point bending tests. This process identified a composite of waste wood and mycelium as a promising filament due to its structural capacity and sustainability profile. The second investigation examined potential concrete additives and aggregate substitutes through a meta-analysis of over 30 studies. Materials were systematically evaluated based on density, mechanical strength, workability, environmental impact, and accessibility. The analysis identified several high-potential candidates, including coffee grounds, recycled rubber, crushed glass, sawdust, and eggshells, each offering distinct performance and sustainability advantages.
