Why the water-reducing rate of water-reducing agent is high?
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Author : Lzh
Update time : 2023-02-06 13:43:50
What is water-reducing agent? Water-reducing agentrefers to an additive that can reduce the mixing water consumption under the condition that the slump of the concrete mixture is the same. The water-reducing agent is a kind of surface active agent; that is, its molecule is composed of the hydrophilic group and hydrophobic group. The molecular structure diagram of surface active agent When the cement is mixed with water, if there is no water-reducing agent, the cement slurry will form a flocculation structure due to the role of molecular cohesion between cement particles, As shown in the following figure, after mixing with water, a part of the free water of the mixing water is wrapped in the flocculation structure of the cement particles, thus reducing the fluidity of the concrete mixture. Suppose the water-reducing agent is added to the cement slurry. In that case, the hydrophobic group of the water-reducing agent will be adsorbed on the surface of the cement particles, making the surface of the water-mud particles have the same electric charge. Under the action of the electric repulsion, The cement particles are separated, as shown in the following figure. The cement slurry is added with water reducing agent to release the free water in the flocculation structure. The adsorption - dispersion and wetting - lubrication of the water-reducing agent make the concrete mixture more mobile without increasing water consumption. In addition, the water-reducing agent can also form a layer of solvated water film on the surface of the cement particles, as shown in the figure below, which plays a good lubrication role between the cement particles.
Function and use of water-reducing agent The water-reducing agent added to the concrete mixture can disperse the cement particles, improve its workability, reduce the unit water consumption, and improve the fluidity of the concrete mixture, Or reduce the unit cement consumption to save cement. The water-reducing agent is a concrete admixture that can reduce the water consumption of mixing when the concrete slump is unchanged. Water-reducing agents are mostly anionic surfactants, including lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. Extended data: the water-reducing rate of high-efficiency water-reducing agents can reach more than 20%, mainly naphthalene series, melamine series, and water-reducing agents compounded from them, of which naphthalene series is the main, accounting for 67%, especially in China, Most of the superplasticizers are naphthalene series superplasticizers with naphthalene as the main raw material, which is characterized by high water reduction rate.
There are several water reducing agents 1. Common varieties and applications of concrete admixtures: the water-reducing agent is the most widely used and used. Admixtures can be divided into the common water-reducing agent, high-efficiency water-reducing agent, early-strength water-reducing agent, retarding water-reducing agent, retarding high-efficiency water-reducing agent, air-entraining water-reducing agent, etc. according to their different uses. See the application of a common water-reducing agent in the following table for the application of common water-reducing agent 2. Early strength agent 3. Retarder 4. Air entraining agent 5. Expansion agent 6. Antifreeze.
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 tocontact usor inquire at any time.
