Unprocessed calcareous fly ash as a partial cement replacement in self-compacting concrete

Unprocessed calcareous fly ash as a partial cement replacement in self-compacting concrete

Blog Article

The effect of partial replacement of cement by unprocessed calcareous fly ash on Goku fresh and hardened properties of self-compacting concrete was investigated.Concrete mixes containing 27.5%, 35%, 42.5%, 50%, 57.

5% and 65% of fly ash based on the total weight of binder (cement + fly ash) were tested.All the mixes were designed to have the same volume proportions of paste, fine aggregate and coarse aggregate.Properties investigated were slump flow, J-ring, V-funnel, L-box and sieve segregation of fresh concrete mixes and compressive and flexural strength, dynamic modulus of C+BIOFLAVONOIDS elasticity, water absorption, volume of permeable voids and density of hardened concrete.The results showed that increase in fly ash content from 27.

5% to 50% leads to improvement in workability without significant effect on segregation resistance and hardened concrete properties.Further increase in fly ash content results in worsening of both fresh and hardened concrete properties.