Synthesis, Properties and Dispersion Mechanism of Sulphonated Acetone-formaldehyde Superplasticizer in Cementitious System
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第6期
论文作者：LIU Ming LEI Jiaheng DU Xiaodi
文章页码：1167 - 1171
摘 要：The synthesis, properties and dispersion mechanism of sulphonated acetone-formaldehyde superplasticizer（SAF） were presented. This superplasticizer was synthesized by the reaction among acetone, formaldehyde, sodium sulfite and pyrosulfite. The structure and property were respectively characterized by IR and surface tension measurement. Performance of SAF in cement was evaluated by paste flow as well as heat calorimetry. The dispersion mechanism was identified via adsorption and zeta potential measurement. The results show that cement paste mixed with SAF shows good fluidity. SAF exerts little retarding effect on cement paste and it behaves like a typical polycondensate superplasticizer. The main dispersion mechanism of SAF is attributed to electrostatic repulsion.
LIU Ming1，LEI Jiaheng2，DU Xiaodi2
1. School of Materials Science and Engineering,Wuhan University of Technology2. Department of Chemistry,School of Science,Wuhan University of Technology
摘 要：The synthesis, properties and dispersion mechanism of sulphonated acetone-formaldehyde superplasticizer（SAF） were presented. This superplasticizer was synthesized by the reaction among acetone, formaldehyde, sodium sulfite and pyrosulfite. The structure and property were respectively characterized by IR and surface tension measurement. Performance of SAF in cement was evaluated by paste flow as well as heat calorimetry. The dispersion mechanism was identified via adsorption and zeta potential measurement. The results show that cement paste mixed with SAF shows good fluidity. SAF exerts little retarding effect on cement paste and it behaves like a typical polycondensate superplasticizer. The main dispersion mechanism of SAF is attributed to electrostatic repulsion.
关键词：
