Advances on Corrosion-Resistant Concrete for Sewers
This chapter discusses the advances on corrosion-resistant concrete for sewers from the viewpoint of binder materials, aggregates and additives. For binder materials, alkaline activated materials (AAM) and calcium aluminate cement (CAC) are not included, as they are presented in Chaps. 10 and 11. The performance of several other binder materials, including sulfate resistant cement, the use of supplementary cementitious materials, polymer modified cements, and sulfur binder, under (sulfuric) acidic conditions and sewers conditions are summarized. The possible benefits and limitations of each binder material are critically discussed. The importance of aggregate in corrosion resistant concrete is highlighted primarily due to the high-volume fraction (e.g. > 60%). Aggregates studied include siliceous and calcareous aggregates, crushed CAC clicker aggregate and polyethylene terephthalate (PET) aggregate. Additives may play a significant role in improving the corrosion resistance of concrete. The effects and limitations of using antimicrobial agents and novel corrosion-resistant bioconcrete are also discussed.
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