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By Lzh | 09 February 2023 | 0 Comments

Why are water-reducing agents mostly anionic surfactants?

What is water-reducing agent?
Water-reducing agent is a concrete admixture that can reduce the mixing water consumption when the concrete slump is unchanged. Most are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After adding the concrete mixture, it can disperse cement particles, improve its workability, reduce unit water consumption, and improve the fluidity of the concrete mixture, Or reduce the unit cement consumption and save cement.
Water reducer - lignosulfonate
Lignosulfonate is a by-product of sulfite pulping. Lignosulfonate has a molecular weight of 2000~5000, a sulfonate base of 1.25~2.5 mcq/g, and is soluble in aqueous solutions of various PH values, insoluble in organic solvents, and its functional group is phenolic hydroxyl. Its raw material is lignin, which is generally extracted from coniferous wood. Lignin is polymerized from three lignin monomers, namely paragenol, coniferous, and mustard alcohol, including calcium lignosulfonate and sodium lignosulfonate, Magnesium lignosulfonate and lignosulfonate water-reducing agent are common water-reducing agents, belonging to anionic surfactants, which can be used directly or as one of the raw materials of composite admixtures. Because of their low price, they are still widely used. When used in mortar, they can improve workability, fluidity, and strength, and the water-reducing rate is 8% - 10%.
Application status of water-reducing agent-lignosulfonate
The domestic lignosulfonate water-reducing agent has three main ways out: (1) it can be used as a water-reducing agent alone to prepare coagulation; (2) Used for the preparation of various early strength agents, early strength water reducing agents, retarding water-reducing agents, retarding high-efficiency water reducing agents, pumping agents, waterproof agents and other composite admixtures; (3) It is used for export. According to the survey, 30% of lignosulfonates are exported. In foreign countries, lignosulfonates are considered to be environmentally friendly products. South Korea imports 160000 tons of liquid lignosulfonates from China every year. The United Kingdom, the United States, Japan, and other countries also import lignosulfonates from China, mainly as water-reducing agents alone or as raw materials for composite water-reducing agent products.
Price of water-reducing agent
Water-reducing agent particle size and purity will affect the product's price, and the purchase volume can also affect the cost of the water-reducing agent. A large amount of large amount will be lower. The price of the water-reducing agent can be found on our company's official website.
Water-reducing agent supplier
Luoyang Tongrun Nano Technology Co. Ltd.  (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including water-reducing agents, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for a high-quality and cost-effective water-reducing agent, you are welcome to contact us or inquire at any time.

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