Journal Press India^®

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Hydrophobic additives have been used in cement and concrete for a long time to reduce water penetration. Hydrophobic agents are chemicals added to cement to widen the angle at which water contacts the surface of the concrete. Fatty acids and their fractions have been added to cement as admixtures or phase-change agents to decrease water penetration into concrete. Alkenes, oils, fats, and other greasy substances frequently belong to the hydrophobic molecule class. By lowering water permeability, the hydrophobic component increases the concrete’s longevity and visual appeal. Since the middle of the 20th century, concrete that repels water has gained a lot of popularity in design and building. The frequency of adverse reactions is decreased by the high contact angle of non-polar, lipophilic, hydrophobic substances. This article provides a summary of the studies on the use of hydrophobic substances in cement mortar and concrete.

Keywords

Hydrophobic Agents; Penetration; Durability; Permeability

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