Quantitative Effects of Mixture Parameters on Alkali-Activated Binder-Based Ultra-High Strength Concrete at Ambient and Elevated Temperatures

This work investigates the effects of mixture parameters on slump flow and compressive strength a new type alkali-activated binder-based ultra-high concrete (AAB-UHSC) before after exposure to high temperatures. The innovative UHSC adopts combination sodium silicate (SS) potassium carbonate (PC) as activator. Compared with alkali hydroxide that is currently used in existing AAB-UHSC, salts are environmental- user-friendly cost-effective. Four proportioning parameters, including water/precursor ratio, activator/precursor silica fume (SF) replacement percentage, SS/PC evaluated regarding their quantitative fresh hardened properties AAB-UHSC using Taguchi method. analysis variance (ANOVA) reveals ratio decisive parameter controlling diameter whereas all four have considerable influence at room temperature. Although increasing increases temperature, it adverse for residual Based test results ANOVA, method which lacking literatures, proposed experimentally validated.