As the first generation concrete admixture, Calcium Lignosulfonate is one of the lignin derivatives obtained in the pulp industry. Calcium Lignosulphonate (referred to as wood calcium) is a multi-component polymer anionic surfactant. Its appearance is light yellow to dark brown powder with a slight aromatic odor. It has Strong dispersibility, adhesion, and chelating properties. It is mainly used in water treatment agents, concrete admixtures, dye dispersants, and various complexing agents, adhesives, etc.