Instead of adding heavy soil and stone above aging concrete drainage structures, engineers used ultra-lightweight foam glass made from recycled bottles and containers to safely build new lanes on a 23-mile stretch of Interstate 17 north of Phoenix.

Engineers have ingeniously repurposed discarded glass as a foundation material for highways, utilizing around 300 tonnes of crushed glass cullet beneath road surfaces. This…

Instead of adding heavy soil and stone above aging concrete drainage structures, engineers used ultra-lightweight foam glass made from recycled bottles and containers to safely…