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Table 1: Concrete mix proportioning

Materials/Concrete RCC 126
Design strength fck (MPa) 7
Age (days) 180
Cement (kg/m3) 50
Fly ash from Candiota (kg/m3) 20
Water (kg/m3) 130
Fine aggregate – artificial sand (kg/m3) 1191
Coarse aggregate – 25mm (kg/m3) 631
Coarse aggregate – 50mm (kg/m3) 631
Retarding 283R (kg/m3) 1.30