Effect of Magnetic Water in the Performance of Concrete Subjected to Various Environmental Conditions

Abstract

Concrete is the most cost-effective building material when compared to other materials. It is also the most durable, due to its strong resistance to compression and ability to be moulded into any shape while it is fresh. Concrete is a well-known material for its resistance to a variety of agents such as sulphate attack, chloride attack, weathering, and corrosion. To balance the availability of concrete, a study is conducted for investigating the prospect of promising alternative and similar materials that can replace the typical concrete ingredient. In the present work fly ash was replaced with cement, since fly ash is considered as one of the most well-known Supplementary Cementitious Materials (SCM). Magnetic Grey water was used for the preparation of concrete to minimize the usage of potable water. The magnetic field is used to produce magnetic water with various magnetic intensity. The present work concentrates on the mechanical and durability properties of concrete in which 20% fly ash is replaced in OPC. The concrete specimens are prepared by using normal tap water, magnetized water, grey water and grey magnetic water. The workability and hardened properties of the concrete were studied for slump, compressive strength and flexural strength. The durability properties on acid attack with cube exposing to 5% by volume of H2SO4 and 5% by volume of HNO3, chloride attack with 5% were studied. In phase 1, the magnetic water produced with the use of permanent magnets and magnetic fields are set based on the strength of magnets power as 0T, 0.8T, 1.0T and 1.2T. The fresh concrete properties like workability and hardened properties like compressive strength, flexural strength had been studied for the concrete with 0%, 10%, 20%, 30% and 40% replacement of fly ash by cement with and without magnetic water after 7 days, 14 days, 28 days, 56 days and 90 days of curing. After the initial tests, grey water is utilised to produce concrete with and without magnetic field treatment for the same amount of fly ash replacement.