Effects of various fineness moduli of fine aggregate on engineering properties of high‐performance concrete

Abstract

The effects of various fineness moduli (FM) of fine aggregate on the engineering properties of high‐performance concrete (HPC) were studied. Two kinds of coarse aggregates (stiff and soft) and three kinds of fine aggregates (FM=3.24, 2.73 and 2.18) were used. The results indicate that the slump and flowability for all fresh concrete in this study right after mixing are between 265 and 280 mm, and 670 and 790 mm , respectively. The compressive strengths at the age of 28 days range from 60.2 to 68.7 MPa (stiff coarse aggregate), and 42.0 to 46.0 MPa (soft coarse aggregate), respectively. The corresponding moduli of elasticity are in the range between 27.5 and 29.1 GPa (stiff aggregate), and 23.4 and 25.2 GPa (soft aggregate), respectively. Using the same concrete mixture, the coarsest fine aggregate (FM=3.24) has better positive effects on the properties of the fresh and hardened HPC.