Concrete anti-leakage additive

The invention discloses a concrete anti-leakage additive. The concrete anti-leakage additive is prepared from, by mass, 20-30 parts of rice hull ash, 10-20 parts of silica fume, 10-20 parts of pulverized ash, 5-15 parts of polypropylene fiber, 3-5 parts of water reducing agent, 3-5 parts of expansion agent, 1-4 parts of dispersing agent and 1-3 parts of stabilizer. The concrete anti-leakage additive serves as a high-quality concrete additive, the anti-leakage performance of concrete can be effectively improved, and the service life of concrete is prolonged. 本发明公开了种混凝土抗渗添加剂，包括按质量份数计量的以下原料：稻壳灰20-30份，硅灰10-20份，粉煤灰10-20份，聚丙烯纤维5-15份，减水剂3-5份，膨胀剂3-5份，分散剂1-4份，稳定剂1-3份。本发明作为种优质的混凝土添加剂，可以有效提高混凝土的抗渗性能，延长混凝土的使用寿命。