Abstract
The influence law of clay on mortar fluidity mixed with polycarboxylate superplasticizer was studied. Several methods of inhibiting clay adsorption of polycarboxylate superplasticizer were discussed. The experimental results show that clay has significant effect on the dispersion of polycarboxylate superplasticizer and montmorillonite clay has more significant impact on mortar fluidity than other clays. The pH value and the salts of the solution can affect the adsorption of clay to polycarboxylate superplasticizer. The incorporation of a small amount of sodium hydroxide solution, sodium silicate or cationic surfactants can improve the effect of the clay on the dispersion of polycarboxylate superplasticizer.
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Funded by the National Natural Science Foundation of China(50872151) and the Beijing Municipal Education Commission Program Projects and Beijing University of Civil Engineering and Architecture, Dr. Fund
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Wang, L., Wang, D. Effects of clay on properties of polycarboxylate superplasticizer and solutions. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 30, 1167–1171 (2015). https://doi.org/10.1007/s11595-015-1290-7
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DOI: https://doi.org/10.1007/s11595-015-1290-7