BEHAVIOR OF CONVENTIONAL CONCRETE INCORPORATING CLASS F-FLY ASH AND RECYCLED AGGREGATES
Varieties of waste materials are produced from construction industries, thermal power generating factories etc., impacts and pollute environment. The bulk of this waste remains unutilized. There is increasing shortage of building materials which can be met by producing durable alternative from these wastes. The purpose of this study is based on the investigation of conventional concrete incorporating with class F-fly ash and recycled aggregates to reduce the use of cement and natural aggregates need. The cementitious material content was maintained constant at 383 kg/m3, fine aggregate of 564 kg/m3, coarse aggregate of 1142 kg/m3 and the water/cementitious ratio of 0.48. Conventional Concrete mixture had a replacement of 20% by class F-fly ash and 100% recycled aggregates by volume. Tests were carried out on fresh concrete in terms of viscosity and workability. And the mechanical properties of hardened concrete such as compressive strength were also determined. The sustainable Conventional Concrete (with 20% class F-fly ash & recycled aggregates) developed a lesser 14 and 28-days compressive strength compared with M20 graded Conventional Concrete (with 100% cement & natural aggregates). This paper briefly explained about the preparation of mixtures test methods, comparative discussion and the conclusion based on the test results.
R. JAYALAKSHMI, P. SUBATHRA, C. ESWAR SUDHARSAN AND VEMURI LAKSHMINARAYANA
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