Influence of Adding Time of Superplasticizers on Adsorption Behavior and Dispersive Performance of Cement Pastes
The adsorption behavior, zeta potential and fluidity of the cement paste as well as their mutual relations were investigated to clarify the effect of superplasticizers (i.e., naphthalene formalde sulfonate (NFS) and polycarboxylic copolymer (PCC)) on the adsorption and dispersion of the cement paste. The results show that the adsorption amount of NFS and PCC on cement particles decreases with the deteration of adding superplasticizer. The adsorption, zeta potential and fluidity of the cement paste varied with the time of adding superplastizer. The adsorption amount and the zeta potential both reduced with the deteration of adding time. The best adding time of NFS was 10 min after mixing water. The adsorption degree of NFS on cement particles was quite small and the fluidity of cement paste reached superior when PCC and water were added simutaneously.
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Document Type: Research Article
Affiliations: State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
Publication date: 2013-06-01
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- Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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