The Flowability and Adsorption of Low Sulfate Cement with Superplasticizers

Abstract:

The compatibility of low sulfate cement with naphthalene (NS) and polycarboxylate (PCE) type superplasticizers was discussed. The flowability of slurry and the adsorption of superplasticizers (SP) were investigated by mini slump test and TOC. The results show that severe compatibility degeneration is caused by low sulfate content in cement slurry. The water demand of slurry, the standard dosage and adsorbed amount of SPs were dramatically raised. In the cement slurry with low sulfate content, polycarboxylate type superplasticizers presents better performance than naphthalene type. The PCE with lower charge density presents better robustness. It is recommended in the preparation of concrete to avoid the incompatibility problems caused by lack of sulfate in cement paste.

• Periodical: Applied Mechanics and Materials (Volumes 477-478)
• Pages: 904-907
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.477-478.904
• Online since: December 2013
• Authors: Ming Zhe An, Song Han
• Keywords: Adsorption, Cement, Compatibility, Sulfate, Superplasticizer

References

[1] I. Schober, U. Mader: Cem. Con. Res. Vol. 34 (2002), p.119.

[2] S. Han, P.Y. Yan and X.M. Kong: Sci. China Technol. Sci. Vol. 54 (2011), p.183.

[3] S. Han, P.Y. Yan: J. Chin. Chem. Soc. Vol. 38 (2010), p.1765. (In Chinese).

[4] S. Han, P.Y. Yan: 13th International Congress on the Chemistry of Cement, (2011).

[5] K. Yoshioka, E. Tazawa, K. Kawai and T. Enohata: Cem. Con. Res. Vol. 32 (2002), p.1507.

[6] Q. Wang, J.W. Yang and P.Y. Yan: Sci. China Tech. Sci. Vol. 55 (2012), p.3378.

[7] J. Plank, K. Pöllmann, N. Zouaoui, et al.: Con. Res. Vol. 38 (2008), p.1210.

[8] Q. Wang, P.Y. Yan and J.J. Feng: Mag. Concrete Res. Vol. 65 (2013), p.71.

[9] S. Han, J. Plank: Adv. Cem . Res, Vol 25 (2013) , p.200.

[10] S. Han, P.Y. Yan and R.G. Liu: Sci. China Technol. Sci. Vol. 55 (2012), p.2284.