Foam Glass

What is Foam Glass?

Foam glass can go by a variety of names: foamed glass aggregate, foam glass gravel, or cellular glass. Whatever terminology is used, it’s a lightweight, thermally insulating aggregate made from post-consumer recycled glass. Whether it’s used as lightweight fill for civil projects, as thermal insulation underneath a concrete slabs or limecrete floors, or even as lightweight green roof fill, foam glass is an ideal building material to solve some of the construction industry’s most pervasive issues.

Since foam glass is derived entirely from recycled glass, it’s incredibly low embodied carbon and one of the most environmentally sustainable building materials on the market.

The Production Process of Foam Glass:

The production process of Foam Glass Aggregate is a fascinating journey from recycled glass to a versatile building material. Here’s an overview of the steps involved:

  • Collection and Cleaning: The process begins with the collection of post-consumer recycled glass. This glass is thoroughly cleaned to ensure it contains less than 1% non-glass contaminants.
  • Milling: The cleaned glass is then milled into a superfine powder. This step is crucial as it prepares the glass for the sintering process.
  • Mixing with Foaming Agent: The glass powder is measured and mixed with a foaming agent. The foaming agent will help the glass expand and form the cellular structure of foamed glass.
  • Sintering: The mixture is then conveyed into ovens where it undergoes sintering at high temperatures, around 900°C. This heat causes the glass powder to expand and transform into foamed glass.
  • Cooling and Formation: As the foam glass exits the kiln on a conveyor belt, it cools down. During this cooling phase, tension cracks occur, which helps in breaking down the material into gravel-sized pieces of foam glass aggregate.
  • Packaging: Finally, the foam glass aggregate is packaged into big bags of various volumes, ready for transportation and use in construction projects.

This process not only recycles waste glass but also creates a product that is lightweight, insulating, and environmentally friendly, making it the sustainable choice for modern construction and Limecrete Floors.

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