The use of volcanic scoria from 'Djoungo' (Cameroon) as cement replacement and fine aggregate by sand substitution in mortar for masonry. - Juimo Tchamdjou, Willy Hermann; Cherradi, Toufik; Abidi, Moulay Larbi; Pereira-de-Oliveira, Luiz A. (European Journal of Environmental & Civil Engineering, 2020)