Marish Sabiniano Madlangbayan, Jeza Mae Monocay Avendaño, Kim Fuentes Prodigalidad, Milagros Momongan Peralta, Ronaniel Almero Almeda, Engelbert Kasilag Peralta, Marloe Baclayon Sundo, and Maricel Aquino Eneria. “EFFECT OF NANOSILICA ON THE STRENGTH OF CONCRETE WITH VOLCANIC PUMICE AS COARSE AGGREGATES”. GEOMATE Journal, vol. 19, no. 75, Nov. 2020, pp. 50-57, https://geomatejournal.com/geomate/article/view/1126.