Properties of Concrete Incorporating Magnetized Water

Abstract

Mixing water plays a major role in determining concrete workability, strength, and durability. Previous work has indicated that magnetizing the mixing water can introduce some improvements in concrete workability and strength when the level of magnetization is well adjusted. However, there is a scarcity of data on the impact of water magnetization on concrete properties, particularly its durability and long-term properties. There are no data available either on the impact on concrete performance of storage of magnetized water before mixing. In this work, concrete mixtures were made with water-to-cementitious material ratios of 0.35 and 0.45 with and without admixtures. Water was incorporated at levels of magnetization of 0, 0.1, 0.2, 0.3, and 0.4 tesla. A set of concrete mixtures was made with freshly magnetized water, and another set of mixtures was made with magnetized water that was left in storage for 3 days. Testing included unit weight, air content, slump, slump retention, compressive strength, modulus of rupture, water permeability, rapid chloride permeability, chemical soundness, and abrasion resistance. Results reveal that magnetized water enhances concrete workability although the enhancement varies according to mix parameters. Some indications of improvements in concrete durability were also observed. Yet reduction in concrete mechanical properties was recorded in several mixtures. Care should be taken in selecting the magnetic field to ensure minimal negative impacts. A detailed assessment is needed to evaluate the feasibility of magnetized-water concrete, which may have merit, particularly for concrete mixing plants.