Harrat Lunayyir is a basaltic volcanic field in NW Saudi Arabia. Lava flows are basaltic to basanitic in composition, and the Holocene flows are alkali olivine basalts. The volcanic field contains about 50 cones that were constructed on Precambrian crystalline rocks along an N-S axis. The dominantly basaltic lavas of Harrat Lunayyir have been divided based on their erosion characteristics into ...

The widespread use of natural aggregates is one the main causes depletion resources, as are constituents several construction materials. Alternatively, it is, today, proven to be feasible mining tailings, either or recycled materials, produce artificial through specific processes. A possible way aggregate alkali activation powdered material in a process called geopolymerization. This study prop...