Sodium Lignosulfonate (lignosulfonate) water reducer is mainly for concrete mixture as water-reducing additive. Low dosage, low air content, water reducing rate is high, adapt to most kind of cement. Can confected as concrete early-age strength enhancer, concrete retarder, antifreeze , pumping aids etc. Nearly no precipitate product in the liquor additive which is made from the sodium lignosulphonate and naphthalin-group high-efficiency water reducer. The sodium lignosulphonate is suitable for apply to building, dam, high speed way project, etc.