Porosity and strength of PFA/SF/OPC ternary blended paste

The results presented in this paper form part of an investigation into the optimisation of a ternary blended cementitious system based on ordinary Por tland cement (OPC)/pulverised fuel ash (PFA)/silica fume (SF) for the devel opment of high-performance concrete. Cement pastes covering a wide range of PFA/SF blending proportions were investigated. Compressive strength and po rosity at the ages of 7, 28, and 90 days for cement paste specimens contain ing 0%, 15%, 20%, 25%, 30%, 35%, 40% and 45% PFA along with 0%, 5%, 10% and 15% SF as partial cement replacement at a water-binder ratio of 0.30 were investigated. A statistical approach was used which permitted the calculati on of the isoresponse curves for the parameters under study over the experi mental domain and the optimisation of their effect. (C) 2000 Elsevier Scien ce Ltd. All rights reserved.