UTELITE

Lightweight particulate material, namely, lightweight sand and gravel produced by vitrification of shale for use in concrete, lightweight sand and gravel produced by vitrification of shale for soil, lightweight sand and gravel produced by vitrification of shale used as a filter medium in water treatment and lightweight sand and gravel produced by vitrification of shale for surface treatment on highways and roads; Lightweight particulate material, namely, lightweight sand and gravel produced by vitrification of shale for surface treatment of highways and roads