Page - 941 - in Book of Full Papers - Symposium Hydro Engineering

4.4. CONCRETE COMPRESSIVE STRENGTH Compressive strengths results of the various mixes for ages of 7, 14, 28, 42 and 90 days presented in Fig. 6 to fig. 8. Comparatively to the reference concrete, at twenty days old, the increase in compressive strength was in the mix design for RCC6 with 6% iron ore powder filler. In a study, Friedin (2005) proved that the high levels of CaO and SO3 in the ash of wind makes the wind ash have a good cement property and therefore gradually increases the compressive strength [13]. Fig. 6 7, 14, 28-days compressive strength resultes Fig. 7 7, 14, 28, 42-days compressive strength 0 20 40 60 80 100 120 140 160 180 RCC-1 RCC-2 RCC-3 RCC-4 RCC-5 RCC-6 RCC-7 RCC-8 RCC-9 Specimens 7 Days 14 Days 28 Days 0 20 40 60 80 100 120 140 160 180 RCC-1 RCC-2 RCC-3 RCC-4 RCC-5 RCC-6 RCC-7 RCC-8 RCC-9 specimens 7 Days 14 Days 28 Days 42 Days 941