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Concrete is the most widely used building material in civil infrastructure in the world, but because its hydrophilic and porous surface structure promotes the penetration of water and the erosion of corrosive ions, the concrete is damaged by freezing and melt, expansion and denudation, which leads the safety and durability of concrete structure to seriously reducing. Superhydrophobic surfaces have good water resistance and can be applied to concrete, coating or overall superhydrophobic concrete has received considerable attention in the last decade, and also has a good application value in the field of anticorrosion and ice prevention. In this context, this paper first briefly summarizes the basic wettability model for concrete concrete cases. Secondly, we review the existing advanced strategies for constructing superhydrophobic concrete, mainly divided into surface hydrophobic modification and overall hydrophobic modification, and summarize the advantages and disadvantages of two different strategies. When the concrete is in the extreme environment such as cold and marine environment, it is particularly important to improve the anti-corrosion and ice prevention performance of the concrete, so the influence of the water modification is discussed in this paper. In addition, the theoretical basis of superhydrophobic modification technology for concrete corrosion and ice is briefly described. Finally, the challenges in the current fabrication and application of superhydrophobic concrete and the potential solutions to these problems are indicated. [ABSTRACT FROM AUTHOR]

Under loading and environment, the cracking will easily occur and reduces the durability and strength of the structure concrete. Inspired by the capsule-based self-repairing system, a self-healing system of repairing agent to be encapsulated in the porous lightweight aggregates that are used as carriers was proposed. In the paper, the recent progresses of lightweight aggregates self-repairing cementitious materials are reviewed and the rupture mode of inorganic porous lightweight aggregates and the mechanism of repairing agent to be released are described. The mechanical properties and durability of the cementitious matrix are compared before and after the repairing process and the evaluation methods of crack-repairing degree and repairing efficiency are also discussed. Finally, the key problems and the research direction of lightweight aggregate self-repairing cementitious material are summarized. [ABSTRACT FROM AUTHOR]