designed. Heavyweight concrete mixes can be proportioned using the American Concrete Institute method (ACI) of absolute volumes developed for normal concrete (Bunsell and Renard, 2005). The
absolute volume method is generally accepted and is considered to be more convenient for heavyweight concrete (Kaplan, 1989). Hence, the absolute volume method to obtain denser concrete
was used in the calculation of the concrete mixtures. Mix proportions of aggregates per 1 m3 of the concrete mixture are listed in Table 3. Four series of high-performance concrete mixes with
compressive strength in excess of 60 MPa (grade- M60) were prepared using 10% SF, 20% FA and 30% GGBFS as a partial addition to OPC to study the effect of a supplementary cementing material
on the properties of concrete containing heavyweight aggregate. The optimum ratios of supplementary materials were selected on the basis of an earlier research work conducted by Ouda (2013). After extensive trials and errors, cement content (450 kg/m3
) and sand-to-total aggregate ratio (40%) were adjusted for all concrete mixtures. Coarse aggregates were used in a saturated surface dry condition to avoid the effect of water absorption of coarse aggregate during mixing and consequently to assess the real effect
of coarse aggregate on the concrete properties. All concrete mixes had a constant water to cementitious ratio of 0.35 and superplasticizer (SP)