Feasibility Study on Bisphenol A as Phenol Replacement to Produce Aminosulfonate-Phenol-Formaldehyde Superplasticizer for Application in Concrete
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 6
Abstract
In this study, phenol was replaced by a powdery bisphenol A to produce aminosulfonate -phenol-formaldehyde (ASPF) superplasticizer (SP); ASPF SP and aminosulfonate-bisphenol A- formaldehyde (ASBF) SP were prepared. ASPF and ASBF SPs have , ─OH, , , functional groups, the weight-average molecular weight of 17.22 and 18.61 kDa, respectively, and the average polydispersity index of 1.08 and 1.53, respectively. The cement particle surface with ASPF SP has a higher initial zeta potential than that with ASBF SP. Along with time, the zeta potential of the cement particle surface with ASPF and ASBF SPs of change from and , respectively, in initial time, to and , respectively, after 120 min. ASPF SP exhibits a higher water reduction percentage than ASBF SP. The concrete with ASPF SP has a higher slump loss rate and mechanical properties than that with ASBF SP. The air content, wet density, and setting times of cement pastes with ASPF and ASBF SPs have no differences. It is an effective method to produce ASPF SP in a cleaner process.
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Acknowledgments
The authors thank Min Deng, Professor of Nanjing University of Technology; his sponsorship and support made this study possible.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 6 • June 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Nov 22, 2013
Accepted: Jun 5, 2014
Published online: Aug 13, 2014
Discussion open until: Jan 13, 2015
Published in print: Jun 1, 2015
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