Utilization of oil palm kernel shell as lightweight aggregate in concrete - A review

► Seventy-four recent and past papers have been reviewed on oil palm kernel shell concrete (OPKSC). ► Physical, mechanical, durability, functional and structural behaviors of OPKSC reviewed. ► Data of past 28 years on OPKSC are tabulated for reference. ► Properties of lightweight concrete (LWC) compared with OPKSC. ► Discussion on very recent paper on foam concrete with OPKS included.