New Methodology to Proportion Self-Consolidating Concrete with High-Volume Fly Ash

作者：Chowdhury Subrato^*; Basu Prabir C

来源：ACI Materials Journal, 2010, 107(3): 222-230.

• hardened state properties
• mixture proportioning
• rheology
• self-consolidating concrete

A new methodology to proportion self-consolidating concrete (SCC) suitable for high-volume ASTM Class F fly ash content is introduced. Ingredients are determined from explicit criteria on strength and rheology. The water-cementitious material ratio (w/cm) is derived from the model systematically developed for this study. The quantity of chemical admixture and fine aggregates are determined from the rheological requirement. Finally, the quantity of coarse aggregate is calculated using the absolute volume method and finalized by adjusting the volume fractions. The suitability of the method is examined by proportioning SCC mixtures with different powder composition and fine aggregate types. The workability and compressive strength as well as the split tensile strength of these mixtures are tested. The results suggested that the method was adequate to proportion SCC mixtures with ingredients used in this study, satisfying both of the requirements of strength and rheology.

• 出版日期2010-6