concrete admixture

There are many directions for changing the mother liquor process, such as temperature, redox agent, chain transfer agent, stirring and dropping time, acid-to-ether ratio, acid feeding method, and reactor bottom material concentration. In my personal experience, the acid-to-ether ratio and the acid-feeding method have the most significant impact or make the biggest difference.

The acid-to-ether ratio is converted into a substance ratio in literature and then adjusted. This is a standard operation in the early stages of product research. Now that the acid to ether ratio has a relatively reasonable ratio, I prefer to change the ratio directly and clearly, its proportion in one ton (one kilogram) of mother liquor. Acrylic: monomer = 40:340 is a commonly used ratio. Increasing the acrylic acid dosage can increase the mother liquor’s water reduction rate, but an acrylic acid dosage that is too high will reduce the slump retention performance of the mother liquor. In sales, the cost of the product is often considered in order to lower the selling price. Increasing the amount of acrylic acid based on acrylic acid: monomer = 40:340 will increase the mother liquor’s solid content, thereby increasing costs. A more straightforward and crude operation directly reduces the monomer dosage, leaving everything else unchanged—for example, change acrylic:monomer=40:340 to acrylic:monomer=40:330 or acrylic:monomer=40:320. When the polycarboxylic acid mother liquor was first launched, the standard solid content was generally 40%. Through continuous competition and price reduction, the solid content of the mother liquor in the market is still 40%. Most of the solid content of the mother liquor is only 38.5% or even lower.