Water-reducing agent means that the mixing water consumption can be reduced and the strength of concrete can be improved under the condition that the workability of concrete and the dosage of cement are unchanged; Or under the condition that the workability and strength are unchanged, the cement consumption can be saved.

According to its water reducing and strengthening ability, it can be divided into ordinary water reducer (also known as plasticizer) and high-efficiency water reducer (also known as high-efficiency water reducer), which can be divided into first-class products and qualified products.

Divided into: (1) water quality sulfonate; (2) polycyclic aromatic salts; (3) water-soluble resin sulfonate.

Ordinary water reducer should be used for concrete with daily minimum temperature above 5℃. Superplasticizer should be suitable for concrete with daily minimum temperature above 0℃, and also suitable for preparing high fluidity concrete, high strength concrete and steam curing concrete.