“EXPERIMENTAL STUDY ON FLYASH AND METAKOALIN AS PARTIAL REPLACEMENTOF CEMENT IN CONCRETE”
E. Harika Sushma
P.G. Scholar Student, Structural Engineering, Aditya Engineering College (A), Surampalem , IN
A.S.V.Nagaraju
P.G. Scholar Student, Structural Engineering, Aditya Engineering College (A), Surampalem , IN
Keywords: Fly ash, Metakaolin, Compressive Strength, Tensile Strength, Flexural strength, Slump Cone Test
Abstract
As the impact of resource declines and greenhouse gas emissions become clearer, it is becoming increasingly important to minimize the environmental impacts and energy and carbon dioxide intensities of concrete used in construction. The approach was to create alternatives that would reduce environmental, energy and CO2 impacts. This can be achieved by partially replacing the cement with a large amount of fly ash and metakaolin. Fly ash is a by-product of coal combustion and metakaolin (MK) is produced by calcined kaolinite clay at high temperatures.
In this study investigates the mechanical properties of cement has been replaced with fixed percentage of fly ash and variable percentage of metakaolin. Four basic concrete mixes have considered. These are (1) Conventional mix with no material substitutions, (2) 30% replacement of cement with fly ash and 5% replacement of cement with metakaolin, (3) 30% replacement of cement with fly ash and 10% replacement of cement with metakaolin, (4) 30% replacement of cement with flyash and 15% replacement of cement with metakaolin. M30 grade concrete used to get maximum strength. Cubes are tested at 7 days and 28 days of curing period for compressive strength test. Cylinders are tested at 7 days and 28 days of curing period for split tensile test. Beams are tested at 7 days and 28 days of curing period for flexural strength test.The obtained test results are compared with conventional concrete.
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