| Currently, geopolymers (e.g. fly ash and slag) are excellent replacements of the traditional ordinary Portland cement (OPC) concrete due to the less production of carbon dioxide into the environment. In this thesis, a split Hopkinson pressure bar (SHPB) system is used to study the dynamic mechanical properties (i.e. dynamic compressive strength, dynamic tensile strength and dynamic fracture toughness) of slag based geopolymer mortars with two pastes and curing times (7 days, 28 days and 56 days). The results indicate that the dynamic mechanical properties of geopolymer mortars increase with the loading rates. In addition, the dynamic compressive strength, tensile strength, and fracture toughness increase with the increase of curing time and decrease with the increase of water content. Some formulas are proposed to describe the trend of the dynamic compressive strength, tensile strength, and fracture toughness. |
