Vol. 4 Issue 2
Year:2015
Issue:Jun-Aug
Title:Investigation On Pozzolanic Effect Of Mineral Admixtures In Roller Compacted Concrete Pavement
Author Name:S. Krishna Rao, P. Sravana and T. Chandrasekhara Rao
Synopsis:
In the present paper the pozzolanic effect of two different mineral admixtures( Fly ash and Ground granulated Blast Furnace slag) in Roller compacted concrete (RCC) was studied quantitatively with various strength indices namely specific strength ratio(R), index of specific strength(K) and contribution rate of pozzolanic effect to strength(P). Cement was partially replaced with mineral admixtures by 10%, 20%, 30%, 40%, 50% and 60% by weight respectively for Fly ash (FA) and Ground granulated Blast Furnace slag (GGBS). Besides the strength properties, these indices showed that early curing age, specific strength of Fly ash Roller Compacted Concrete (FRCC) decreases with increase in FA content, whereas the specific strength of GGBS Roller Compacted Concrete (GRCC) increases with increase in GGBS content. After 90 days of Curing, the contribution of mineral admixture effect on Flexural Strength of FRCC and GRCC are 50% and 63 % respectively.
Year:2015
Issue:Jun-Aug
Title:Investigation On Pozzolanic Effect Of Mineral Admixtures In Roller Compacted Concrete Pavement
Author Name:S. Krishna Rao, P. Sravana and T. Chandrasekhara Rao
Synopsis:
In the present paper the pozzolanic effect of two different mineral admixtures( Fly ash and Ground granulated Blast Furnace slag) in Roller compacted concrete (RCC) was studied quantitatively with various strength indices namely specific strength ratio(R), index of specific strength(K) and contribution rate of pozzolanic effect to strength(P). Cement was partially replaced with mineral admixtures by 10%, 20%, 30%, 40%, 50% and 60% by weight respectively for Fly ash (FA) and Ground granulated Blast Furnace slag (GGBS). Besides the strength properties, these indices showed that early curing age, specific strength of Fly ash Roller Compacted Concrete (FRCC) decreases with increase in FA content, whereas the specific strength of GGBS Roller Compacted Concrete (GRCC) increases with increase in GGBS content. After 90 days of Curing, the contribution of mineral admixture effect on Flexural Strength of FRCC and GRCC are 50% and 63 % respectively.
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