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Buildings 2017, 7(3), 62; doi:10.3390/buildings7030062

Performance and Compatibility of Phosphonate-Based Superplasticizers for Concrete

1
Department of Engineering and Applied Sciences (DISA), Department of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine, Italy
2
Energy & Materials in Infrastructure & Buildings (EMIB), Faculty of Applied Engineering, University of Antwerp, 2020 Antwerp, Belgium
3
Giovanni Bozzetto S.p.A., 24040 Filago (BG), Italy
*
Author to whom correspondence should be addressed.
Received: 15 May 2017 / Revised: 29 June 2017 / Accepted: 4 July 2017 / Published: 7 July 2017
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Abstract

The paper deals with the effectiveness of an innovative phosphonate-based superplasticizer (PNH) for ready mixed concrete. Concrete specimens were manufactured by considering a constant initial workability, equal to 220 mm slump at the end of the mixing procedure. Workability was measured at 0, 30, and 60 min to evaluate the workability retention performances of the innovative superplasticizer. Compressive tests at 1, 7, and 28 days were carried out to evaluate the influence of the phosphonate-based superplasticizer on concrete setting and hardening. The concrete mixes were designed by considering 13 different cements to assess the superplasticizer-cement compatibility. The PNH-based admixture showed a better performance in terms of water reduction and workability retention with respect to napthalenesulphonate based admixtures (NSF); however, a higher dosage of PNH with respect to polycarboxylate ethers (PCEs) was needed to get the same initial fluidity. View Full-Text
Keywords: concrete; phosphonate-based admixtures; compatibility; workability concrete; phosphonate-based admixtures; compatibility; workability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Coppola, L.; Lorenzi, S.; Kara, P.; Garlati, S. Performance and Compatibility of Phosphonate-Based Superplasticizers for Concrete. Buildings 2017, 7, 62.

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