Expanded Clay Aggregate (ECA) is a lightweight construction material made from clay that is heated and expanded in a kiln. This process creates small, round pellets that are porous and have a low density, making them ideal for various applications in construction and landscaping. ECA is commonly used in concrete production, providing improved insulation and reducing the overall weight of structures. It is also utilized in drainage systems and as a growing medium in hydroponics and green roofs, offering excellent aeration and moisture retention for plants.