Paper Title:
Rheological Properties of Fresh Cement Paste and its Relation to Adsorption Behavior of Superplasticizer
  Abstract

This paper studied rheological properties of fresh cement pastes and adsorption behavior of superplasticizers which are FDN-5R, a type of naphthalene sulfonic acid based condensate, 3350, a type of polycarboxylate superplasticizer, by R/S-SST rheometer and UV Visible Spectrometer. Results show that superplasticizers can reduce the flocculation structure of fresh cement paste obviously and reduce the yield stress and apparent viscosity. The turn of thixotropic property is: blank sample > FDN-5R > 3350, especially the sample with 3350’s curve of upward and downward almost match together and the thixotropic property drives to zero. Shearing stress, apparent viscosity and thixotropic property are decreased, adsorption capacity is higher by the superplasticizer adding. The bigger effectual adsorption, the better dispersive action of flocculation and rheological properties of fresh cement pastes. Therefore, we can understand the effect mechanism and properties of superplasticizer much better by combining the molecular structure, adsorption capacity, dispersive action and rheological properties.

  Info
Periodical
Key Engineering Materials (Volumes 405-406)
Edited by
Hao-Wen YE and Gai-Fei PENG
Pages
96-102
DOI
10.4028/www.scientific.net/KEM.405-406.96
Citation
D. Lin, M. M. Fang, X. L. Xi, H. C. Wang, S. H. Yin, Z. Y. Wen, "Rheological Properties of Fresh Cement Paste and its Relation to Adsorption Behavior of Superplasticizer", Key Engineering Materials, Vols. 405-406, pp. 96-102, 2009
Online since
January 2009
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Price
$32.00
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