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Abstract:This study was initiated to determine the properties of concrete using three types of coarse aggregate. The coarse aggregates evaluated in this study included silicious gravel, the standard aggregate for concrete in the state, with sandstone and limestone as possible alternatives.The main objective of this study was to determine whether limestone and sandstone are suitable replacements for regular Class A gravel. The results indicated that both limestone and sandstone will provide a very suitable replacement for gravel. Improvements were also observed in durability and flexural strength when limestone and sandstone were used in the concrete. The addition of water reducing and super water reducing agents was also very beneficial in gaining high strength in all types of concrete evaluated. Due to the improved freeze-thaw resistance in gravel concrete when air entraining agents were used, it use is recommended in gravel concrete.
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