• Rashid Ul Hameed
• Er. Ravi Kumar

In this paper, the detailed experimental investigation was done to study the effect of partial replacement of cement by Fly Ash (FA) and Rice Husk Ash (RHA) in combine proportion started from 30% FA and 5% RHA and constant weight of admixture 0.7%@ weight of cement through out different mixes together in concrete by replacement of cement with the gradual increase of RHA by 5% and simultaneously gradual decrease of FA by 5%. Last proportion was taken 15%FA and 20% RHA. The tests on hardened concrete were destructive in nature which includes compressive test on cube for size (150 x 150 x 150 mm) at 7,14,,28, days of curing as per IS: 516 1959, Flexural strength on beam (150 x 150 x700 mm) at 28 days of curing as per IS: 516 1959 and split tensile strength on cylinder (150 mm ø x 300mm) at 28 days of curing as per IS: 5816 1999. The work presented in this paper reports the effects on the behavior of concrete produced from cement with combination of FA and RHA at different proportions on the mechanical properties of concrete such as compressive strength, flexural strength, and split tensile strength. Investigation reported that compressive strength increases by 42% in compared with targeted strength and reduces by 2% compared with control concrete at 28 days, flexural strength increases by 2.86% compared with control concrete at 28 days, split tensile strength decreases by 11% compared with control concrete at 28 days, were obtained at combination of 15% FA and 20% RHA. Partial replacement of FA and RHA reduces the environmental effects, produces economical and eco-friendly concrete.

Fly Ash, Rice husk Ash, Flexural Strength, Admixture(NaoH), Compressive Strength, Split Tensile Strength

"EXPERMENTAL STUDY ON THE COMBINED EFFECT OF FLY ASH AND RICE HUSK ASH ON HIGH STRENGTH CONCRETE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.408-419, July-2018, Available :http://www.jetir.org/papers/JETIR1807524.pdf

"EXPERMENTAL STUDY ON THE COMBINED EFFECT OF FLY ASH AND RICE HUSK ASH ON HIGH STRENGTH CONCRETE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp408-419, July-2018, Available at : http://www.jetir.org/papers/JETIR1807524.pdf