Combined Effect Of Water Cement Ratio And Flyasn On Concrete By 25% Replacement

Abstract

Fly ash (FA) is burning coal product which is used as supplementary cementitious materials (SCM) as the conjunction with cement. The use of FA is considered by its pozzolanic properties i.e. SiO2, Al2O3 and CaO to hardened concrete. The potential of FA as SCM has been well-known over the globe but that significant utilization has to be studied based on its compound’s characteristics and pozzolanic activity. For this case, the amount of FA is added 25% by mass of total cementitious material, concrete with fly ash (NFA) and another blended without FA as normal concrete (NC) made of ordinary Portland cement. This amount is indicated as dosage in moderate to high volume of FA classification. In this Study, the detailed experimental investigation was done to study the effect of partial replacement of cement by Fly Ash (FA) in combine proportion 25% FA mix in concrete by replacement of cement. The tests on hardened concrete were destructive in nature which includes compressive test on cube for size (100 x 200 mm) at 7,14, and 28 days of curing as per IS: 516 (1959), The work presented in this study reports the effects on the behavior of concrete produced from cement with combination of FA on the mechanical properties of concrete such as compressive strength, flexural strength, and split tensile strength. Investigation reported that compressive strength increases by 30.15% in compared with targeted strength and reduces by 8.73% compared with control concrete at 28 days. Partial replacement of FA reduces the environmental effects, produces economical and eco-friendly concrete.