Widely used in railway bridges, tunnels, overpasses, industrial plants, residential buildings, water tanks, water towers, roads, airport buildings and other key projects; Especially the crack resistance and water resistance of concrete for tunnel lining, culvert frame structure, building and underground waterproof engineering; Concrete structures such as concrete caps, piers, cast-in-place concrete track slabs for ballastless tracks, and concrete bases are impervious and dense; Suitable for waterproofing works such as roofs, floors, walls, kitchens, bathrooms and basements of industrial and civil buildings; It is especially suitable for moisture-proof and waterproof projects of various pools, swimming pools, underground warehouses, civil air defense projects, subways, tunnels and other buildings.