Concrete additive for hydraulic engineering

The invention discloses a concrete additive for hydraulic engineering and belongs to the technical field of hydraulic engineering. The concrete additive includes: 26-32% of a [beta]-sodium naphthalene sulfonate formaldehyde condensate, 22-28% of fatty alcohol-polyoxyethylene ether sodium sulfonate, 6-12% of heavy sodium alkyl benzene sulfonate, 18-22% of polyvinyl alcohol, 10-14% of stearic acid and 4-6% of sulfate. The concrete additive can be applied in sea sand concrete to improve the structure of the sea sand concrete, increases the physical mechanical performances, such as rupture strength, compressive strength and the like, and also improves salt erosion resistance of the sea sand concrete, thereby improving durability and prolonging service life of the sea sand concrete, so that the concrete additive is especially suitable for hydraulic engineering building, such as sea dike and the like. 本发明公开了种水利工程用混凝土外加剂，属于水利工程技术领域。该混凝土外加剂包括β-萘磺酸钠甲醛缩合物26～32％、脂肪醇聚氧乙烯醚磺酸钠22～28％、重烷基苯磺酸钠6～12％、聚乙烯醇18～22％、硬脂酸10～14％和硫酸盐4～6