15222Fine Aggregate

The fine aggregate should consist of smooth rounded particles to improve the workability of fresh concrete. Normally, the fine aggregate grading should conform to the limits established by the American Concrete Institute [12] for normal-strength concrete. However, for HPC the gradings of fine aggregate should lie on the coarser side of these limits. A fineness modulus of 3.0 or greater is recommended [13,14] for HPC to decrease the water demand and to improve the workability of these paste-rich mixes. Of course, the sand too must be free of silt or clay particles.

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