Effect of Superplasticizers on Apparent Viscosity of Cement-Based Material with a Low Water–Binder Ratio
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 9
Abstract
The presence of a superplasticizer can significantly impact the apparent viscosity of cementitious material. However, its working mechanism remains controversial. In this paper, the effect of different polycarboxylate-based superplasticizers (SPs) on the viscosity of low water-binder ratio cementitious materials was characterized by V-funnel efflux time and rheological parameters. The results show that superplasticizer based on the copolymerization of acrylic acid and polyethylene glycol monoallyl ether shows a better performance compared to the two other types of SPs according to the V-funnel efflux time and apparent viscosity of cementitious materials. Furthermore, it is found that, for a same slump flow value, the apparent viscosity of mortars with different SPs is related to the water film thickness of cement particles, and more closely to the viscosity of aqueous solutions containing unabsorbed SPs.
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Acknowledgments
The authors would like to acknowledge the financial support received from the National Natural Science Foundation of China (Grant No. 51308003 and 51208235) and Foundation Research Project of Jiangsu Province (Grant No. BK2012480).
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 9 • September 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 25, 2015
Accepted: Jan 8, 2016
Published online: Apr 13, 2016
Published in print: Sep 1, 2016
Discussion open until: Sep 13, 2016
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