Page - 942 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 8 7, 14, 28, 42, 90-days compressive strength 5. CONCLUSIONS In this research, different fillers from coking and iron concentrate plants (passing sieve No. #100) made up of 6% of the aggregate’s weight, and 3% of the filler along with 3% of the mineral powder filler has been used and investigated. The purpose of this study was to analyze the effect of various fillers on the roller concrete properties, concrete mechanical properties and its permeability. The results indicated a significant change in the mechanical properties and durability of the roller compacted concrete. 1. Using a high water percentage caused the segregation, which prevented by use of fillers to some extent. According to the design and time of VB, the optimal water-cement ratio was obtained in amount of 0.8 . 2. The highest 7-days compressive strength of concrete related to the RCC1 mixing design with the mineral powder filler indicated increasing compressive strength at the early ages. 3. The highest 28-days concrete compressive strength related to the RCC6 mixing design with Iron Ore Powder Filler indicated an increase in the final strength of the concrete at an advanced age by the filler. 4. The lowest compressive strength growth over time (90 days) observed in RCC1 and RCC3 mixing designs made with 6% mineral powder filler and 6% coke filler, which to some extent indicated that these fillers were not very effective in the cement hydration. 5. The best performance of compressive strength up to 28 days is related to the RCC6 mixing design containing 6% Iron Ore Powder Filler, which at the ages has more compressive strength and performance similar to that expected from Pozzolans. 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 90 Days 942