Plaex-crete bricks contain over 90% recycled plastic and feature a design similar to Lego blocks, allowing for construction without the need for mortar.
Plaex Building Systems, a startup based in Canada, has developed a new type of brick resembling Lego made from recycled plastic, as reported by Interesting Engineering on June 3rd. Named Plaex-crete, these bricks are not only durable and lightweight but also environmentally friendly.
The shape and structure of Plaex-crete are similar to concrete, but they do not suffer from common issues associated with traditional concrete, such as water absorption, degradation, separation, and cracking. This new brick is made from a durable composite material containing over 90% recycled plastic, primarily sourced from agricultural waste and plastics (including PETE, LDPE, PP, HDPE).
The plastic is then processed using extrusion machinery to create a thick mixture similar in texture to cement. This mixture accounts for about 90% of the final product, with the remaining 10% consisting of additives such as colorants, ultraviolet (UV) inhibitors, and fire retardants. As a result, Plaex-crete bricks are 35% lighter than traditional bricks. Despite their lightweight, they can still bear loads without deforming or collapsing.
According to the Plaex Building Systems website, Plaex-crete helps manage various types of hard-to-recycle waste, diverting plastic waste and composites from landfills, thereby reducing carbon emissions and conserving natural resources.
With a design akin to Lego blocks, Plaex-crete makes building as easy as playing with building blocks, eliminating the need for cutting or applying mortar. The unique interlocking mechanism of this new brick allows for construction that is both waterproof and airtight.
Plaex-crete bricks contain over 90% recycled plastic and feature a unique design. (Photo: Plaex Building Systems).
Plaex Building Systems states that a two-story house can be constructed in just 11-12 days using minimal equipment. As automation technology advances, robots may even assist in assembling and fine-tuning structures.
Experts have also evaluated the durability and robustness of Plaex-crete through testing with tensile machines, demonstrating that this new brick can withstand significant impacts and pressure. However, it has not yet been released to the market for residential construction. Plaex Building Systems is currently in the process of obtaining licensing.
