Upgrading Gypsum Boards with Recycled Bio-Waste

The Challenge

Finding eco-friendly building products that benefit the environment while serving as tools for sustainable development is a contemporary challenge. The construction industry is one of the largest consumers of raw materials and generators of waste. Developing approaches that recover bio-waste materials while improving building material performance would advance circular economy goals and reduce environmental impact.

The Solution

This research illustrated the recovery of bio-waste-based materials from paper and wood recycling processes, integrating them into gypsum composites. The GrindoSonic MK7 enabled ultrasonic pulse velocity measurements alongside density, water absorption, flexural strength, compressive strength, and thermophysical characterization. A statistical analysis of variance studied the impact of waste content on physico-mechanical behavior, leading to predictive models for optimizing bio-composite performance.

Key takeaway: Bio-waste gypsum composites with up to 20% cellulose and wood waste deliver superior insulation properties compared to standard boards, with predictive models enabling optimized formulations for specific applications.

Results

By adding cellulose and wood wastes at mass fractions up to 20%, the gypsum becomes lighter and acts as a better insulator with reduced density and thermal conductivity. While mechanical strength decreased with waste addition, the samples still exhibit superior insulation properties surpassing commonly used standard boards. This research advances circular economy approaches by creating value-added building materials from waste streams.