BEHAVIOUR OF DIFFERENT GRADES OF FRESH & HARDENED MAGNETIC WATER CONCRETE CAST WITH WATER SUBJECTED VARYING MAGNETIC FIELD STRENGTHS FOR DIFFERENT EXPOSURE TIMES

Abstract

This paper presents the effect of magnetic structured water on the properties of different grades of
concrete cast with magnetic water of varying magnetic field strengths (0.2 T, 0.4 T, 0.6 T) exposed to 12 hours, 24
hours of magnetic field. Workability, Compressive Strength, Split Tensile Strength of cubes and cylinders cast with
magnetic structured water and cured in magnetic water are determined and the test results are compared with the
results of normal water concrete. It was found that the workability and strengths of Magnetic Water Concrete (MWC)
are more when compared to those of Normal Water Concrete (NWC). The compressive strengths of M25 and M30
grades of Magnetic Water Concrete cast and cured with magnetic structured water of intensity 0.6T with magnetic
exposure time of 24 hour are found to be 50.89 MPa and 54.77 MPa respectively. They are 4.32% & 3.05%
respectively greater than those for cubes of Magnetic Water Concrete cast, cured with magnetic structured water of
intensity 0.6T with magnetic exposure time of 12 hour; and they are 10.31% & 5.024% respectively greater than those
for cubes of Magnetic Water Concrete cast with magnetic structured water of intensity 0.6T with magnetic exposure
time of 24 hour, cured in normal water; and they are 77.81% & 61.68% respectively greater than those for cubes of
Normal Water Concrete cast and cured with normal water. The split tensile strengths of M25 and M30 grades of
Magnetic Water Concrete cast and cured with magnetic structured water of intensity 0.6T with magnetic exposure
time of 24 hours are found to 8.56 MPa and 8.705 MPa respectively. They are 11.31% & 5.64% respectively greater
than those for cylinders of Magnetic Water Concrete cast, cured with magnetic structured water of intensity 0.6T with
magnetic exposure time of 12 hour; and they are 6.6% & 4.38% respectively greater than those for cylinders of
Magnetic Water Concrete cast with magnetic structured water of intensity 0.6T with magnetic exposure time of 24
hour, cured in normal water; and they are 52.18% & 34.34% respectively greater than those for cylinders of Normal
Water Concrete cast and cured with normal water.