EVALUATION OF MECHANICAL PROPERTIES AND ACCELERATED CHLORIDE ION PENETRATION (RCMT) IN ALKALI ACTIVATED SLAG CONCRETE

Cement is one of the main constituent in concrete that its production causes about 7% of CO2 world emission. Alkali activated compounds refer to inorganic materials that cement is not the main constituent in their mixes. In fact, alkali activated binder structure consists of two parts: source material and alkaline activator liquid. The alkaline activator used in this study was sodium silicate solution (wt. ratio: SiO2/Na2O = 2.33) and 6 M potassium hydroxide and also, blast furnace slag is selected as a source material. For discovering the effect of each participant, 9 alkali activated concrete mix designs are utilized. In these mixes the influence of the amount of source material, solid part of alkaline activator, solid part of sodium silicate solution and also the ratio of water to binder is evaluated. In addition, one mix design for ordinary Portland cement (OPC) concrete is performed to compare with alkali activated slag (AAS) concrete characteristics.