Comprehensive Review on Hydrophobic Modification of Concrete: Progress and Perspectives

Abstract

The inherent nature of concrete is porous, hydrophilic, and microcracked, making it susceptible to water penetration into its matrix. This is the primary source of durability concerns. Furthermore, this type of penetration leads to considerable issues for concrete structures, resulting in significant financial burdens due to regular repairs and maintenance and a reduction in the structure's lifespan. In this study, the properties, uses, and advancements of hydrophobic concrete are investigated, focusing on durability, corrosion resistance, and sustainability. The various types and techniques for producing hydrophobic concrete are explored. Additionally, the paper presents the impacts of hydrophobic treatment on concrete properties such as compressive strength, water absorption, and permeability. Potential applications of hydrophobic concrete, including use in bridges, tunnels, and marine structures, are also discussed. The review concludes by examining the benefits, challenges and limitations of hydrophobic concrete technology, including aspects like cost-effectiveness, compatibility with other construction materials, and potential environmental repercussions. In summary, this review highlights the potential of hydrophobic concrete to transform the construction industry by offering enduring and sustainable solutions to water-related issues.

Experimental Investigation on Hydrophobic Alteration of Mining Solid Waste Backfill Material

“…For building concrete, the most commonly used hydrophobic modification methods are surface coating, hydrophobic treatment, and the addition of hydrophobic agents. [17] Sobolev and Batrakov [18] have shown that polyethylhydrosiloxanes and polymethylhydrosiloxane groups can form hydrophobic voids in concrete by releasing hydrogen. Wong et al [19] performed hydrophobic modification of cement mortar by PDMS, and the results showed that the concrete surface modified by PDMS was superhydrophobic, with a contact angle of 157.3° and a sliding angle of 8.7°.…”