Estimating Proportions for Structural Concrete Mixtures


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Title: Estimating Proportions for Structural Concrete Mixtures

Author(s): Sandor Popovics

Publication: Journal Proceedings

Volume: 65

Issue: 2

Appears on pages(s): 143-150

Keywords: aggregates;cement content;density;heavy-weight concretes;lightweight concrete;mix proportioning;specific gravity.

Date: 2/1/1968

Simple formula are unit weight as well as presented for the prediction for the relationship between of fresh cement content and mix proportions of various structural concretes. These formulas are useful mainly for proportioning struc-tural lightweight and heavyweight concretes because the unit weight and the cement content have greater significance for these mixtures than for normal weight concretes. The formulas are also applicable when the mineral aggregate in question is blended with aggregates of differing specific gravities-such as a conventional sand and a lightweight coarse aggregate-provided that the average specific gravity of the blended aggregate is computed by a formula developed for this purpose. Experimental results support the formulas within a wide range. The limits of validity are given. Numerical examples illustrate the use of the formulas.