Study On Synthetic Technology Of Low-cost Amino-sulfonic Acid-based Superplasticizer

Based on analyzing the synthesis mechanism of amino-sulfonic acid-based superplasticizers, phenol, sodium 4-aminobenzenesulfonate and formaldehyde were as the main raw material, and the monomer proportion, pH value, the drippy speed and the temperature of formaldehyde, the reaction time and reactant concentration were optimized as synthetic process parameters for synthesis of excellent amino-sulfonic acid-based superplasticizers with low cost and pollution.After optimizing the synthesis process of amino-sulfonic acid-based superplasticizers, we modified and synthesized the amino-sulfonic acid-based superplasticizers with low cost and pollution by adding the waste from factory process.According to the relevant test standard, we detected the various properties of the optimized and three kinds of synthesized and modified amino-sulfonic acid-based superplasticizers, including cement paste fluidity, slump loss with time duration, water-reducing rate, compressive strength, as well as setting time, and compared them with those of the amino-sulfonic acid-based superplasticizers produced by AnHui XinGu environmental protection joint-stock company’. The results show that the properties of the synthesized amino-sulfonic acid-based superplasticizers in this paper are similar to those of the company’s amino-sulfonic acid-based superplasticizers, and in line with GB8076-2008 on inspection of concrete performance requirements, but the price is lower than that of the Company’s amino-sulfonic acid-based superplasticizers. At present, the low cost amino-sulfonic acid-based superplasticizers MAS-VIII has been production on a large scale in AnHui XinGu environmental protection joint-stock company.