Yes, It is used for manufacturing hollow blocks and solid blocks. We do offer solid Expanded Clay Aggregate (ECA ®) BLOCKS which 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 resistance adding to several advantages including durability, versatility, speed and ease-of-use as well as cost benefits and environmental considerations.