This paper focuses on the engineering properties of GBFS as a basis for applicability assessment to construction materials. The obtained results indicate that GBFS in Vietnam have grained grade in range of medium to course size, bulk specific gravity is approximate g/cm3 , specific gravity is less than g/cm3 and content of CaO and SiO2 is around 35-38%. | Characteristics and applicability of Granulated Blast Furnace Slag (GBFS) as construction materials in Vietnam