HIGH-PERFORMANCE CONCRETE - REQUIREMENTS FOR CONSTITUENT MATERIALS AND MIX PROPORTIONING

An experimental program has been carried out to establish specificatio ns for constituent materials of high-performance concrete (HPC) mixtur es. Many general recommendations can be found in the bibliography, but not enough to determine precisely how to specify cements, aggregates, and admixtures for HPC. Cement has to be selected not only according to its strength but also its water demand and setting time. Suitable a ggregates are those with good mechanical properties, controlled by the Los Angeles coefficient. In addition, water demand of the aggregate m ust be low, controlled by its absorption and shape coefficient. Also, a mix proportioning method has been established to proportion HPC mixt ures for strengths up to 110 MPa.