Expanded Clay Aggregate (ECA) 🏗️Construction Masonry Block🏗️ Expanded Clay Aggregate (ECA) BLOCKS are masonry units manufactured using Expanded Clay Aggregate (ECA), Class F fly ash and Cement. They are used for non-load bearing wall masonry. After application of a high-performance innovative technology of manufacturing and post curing process, Expanded Clay Aggregate (ECA) BLOCKS gains superior material properties. It also offers no reduced shrinkage and a superior fire and chemical resistanc