Minh, D., Minh, H. and Nhi, N. 2021. Unbaked materials from mixtures of waste sludge of a water purification plant, fly ash, and water glass. VNUHCM Journal of Engineering and Technology. 4, 1 (Feb. 2021), 663-669. DOI:https://doi.org/https://doi.org/10.32508/stdjet.v4i1.754.