In order to further control the cracks in the waterproof concrete of the water tank,the shortcom-ings of calcium-based expansive agents and the advantages of magnesium-based expansive agents were expoun-ded.Combined with the design concept of waterproof concrete for water tanks with few or no seam,the con-cept of delayed expansion and continuous compensation shrinkage waterproof concrete for pools was proposed.The design and construction key points of delayed expansion and continuous compensation shrinkage water-proof concrete were discussed,which were applied to a 300,000-ton water treatment plant.Practical applica-tion show that magnesium-based expanding agents have the advantages of delayed expansion and continuous compensation shrinkage,which can better compensate for the shortcomings of traditional calcium-based expan-sive agents.It can achieve seamless or few-seam design for pools,pump rooms and other structures in water supply and drainage projects.The concept and application can provide reference for the design of similar pools and pump rooms.
Shrinkage-compensating concreteMagnesium oxide expansive agentsWater tankExpansive agents for concrete
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