The Technological University of the Philippines in cooperation with Nihon University, and Japan's Ministry of Education, launched an R&D project on utilization of Mt. Pinatubo ejecta for modular housing construction. One of the major concerns of the Philippine government is how to provide decent and affordable housing units to the Filipino masses. A possible answer to this is to come up with pre-cast and modular structural components that will facilitate speedy and low-cost construction of residential buildings. Another aspect of this study is the utilization of volcanic aggregates from the 1991 Mt. Pinatubo eruption. The utilization of this abundant material will address both the ecological problem and the challenge to create cheaper but quality construction materials.