MIT engineers are exploring the potential of 3D-printed glass bricks for sustainable construction. Inspired by the concept of circular construction, these innovative glass bricks can be easily disassembled, reassembled, and recycled, offering a sustainable alternative to traditional building materials. The team behind this development envisions a future where buildings, much like LEGO bricks, can be repurposed multiple times, reducing waste and the environmental impact of construction.
By developing reconfigurable masonry using recycled glass, the engineers have demonstrated the remarkable strength of these 3D-printed bricks. Shaped like figure eights, the bricks are designed to interlock in a manner similar to LEGO pieces. When subjected to mechanical testing, these bricks withstood pressures comparable to concrete blocks, showcasing their potential for robust structural applications.
Circular Construction with Glass Masonry
At the core of this breakthrough is the use of glass as a recyclable material. According to Kaitlyn Becker, assistant professor of mechanical engineering at MIT, “Glass is a highly recyclable material. We’re taking glass and turning it into masonry that, at the end of a structure’s life, can be disassembled and reassembled into a new structure or can be stuck back into the printer and turned into a completely different shape.”
This sustainable approach aligns with the idea of circular building materials, which can extend the lifecycle of construction components. The innovative glass bricks can be used in building facades or internal walls, then dismantled and reshaped for future projects, effectively closing the loop on material use in construction.
Michael Stern, a former MIT graduate and founder of Evenline, emphasized the unconventional use of glass as a building material, saying, “Glass as a structural material kind of breaks people’s brains a little bit. We’re showing this is an opportunity to push the limits of what’s been done in architecture.”
Pioneering 3D Glass Printing Technology
The development of these 3D-printed glass bricks builds on MIT’s expertise in glassblowing and additive manufacturing. The team, working in MIT’s Glass Lab, utilized the Glass 3D Printer 3 (G3DP3) to print prototype bricks from soda-lime glass, a common type of glass used in construction. These prototypes were designed with interlocking features and tested for durability, proving to be as strong as traditional masonry materials.
The unique figure-eight shape of the bricks allows for flexibility in their assembly, enabling the creation of walls with curvature and the possibility of modular reconfiguration. The goal is to eventually scale this technology to create larger glass structures, such as pavilions or temporary buildings, that can be reassembled and repurposed for new designs.
As Stern points out, “We’re thinking of stepping stones to buildings and want to start with something like a pavilion — a temporary structure that humans can interact with and that you could then reconfigure into a second design.”
This innovative approach to glass masonry offers a glimpse into a future where buildings can be constructed, taken apart, and rebuilt with minimal waste, paving the way for more sustainable architecture.
Source: news.mit.edu
