Effect of Polymer Surfactants on the Inhibition of Beta-Dicalcium Silicate Decomposition in Sodium Aluminate Solution

Abstract:

The decomposition behavior of synthetic β-2CaO•SiO₂ by adding sodium polyacrylate (NaPAA), polyethylene glycol (PEG) and their mixture at 80°C in sodium aluminate solution was investigated. The SiO₂ concentration in the reacted sodium aluminate solution decreases as the polymer surfactant charge increases, but does not change obviously when each surfactant is added over 12.5 mg/L. The amount of CaCO₃, hydro-garnet and sodium aluminum silicate hydrate in the decomposed solid with polymer surfactant addition is much smaller than that without surfactant addition. The losses of Na2O and Al₂O₃ are greatly decreased due to polymer surfactant addition. The inhibition sequence of β-2CaO•SiO₂ decomposition by polymer surfactants in sodium aluminate solution is mixture of NaPAA and PEG, NaPAA, PEG.

• Periodical: Advanced Materials Research (Volume 402)
• Pages: 316-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.402.316
• Online since: November 2011
• Authors: Xiao Lin Pan, Hai Yan Yu, Bo Wang, Ting Ting Ding, Yong Pan Tian, Hang Su, Shi Wen Bi
• Keywords: Beta-Dicalcium Silicate, Decomposition, Polyethylene Glycol (PEG), Sodium Aluminate Solution, Sodium Polyacrylate

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