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Application of 1H Low-Field NMR Spectroscopy for the Determination of the Concentration and Molecule Weight of Polycarboxylate Superplasticizers

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Journal of Applied Spectroscopy Aims and scope

As a type of water reducer, polycarboxylate superplasticizers (PCEs) has been widely used in the concrete industry. The concentration and molecule weight of PCEs have a profound impact on the performance of fresh concrete. Based on 1H low-field nuclear magnetic resonance (NMR) spectroscopy, this paper developed a novel method for the determination of the concentration and characterization of the molecule weight of PCEs. Five types of PCEs with various ether to acid ratios (3:1 to 5:1) and functional groups were synthetized in laboratory conditions, and their molecular structures were characterized by size exclusion chromatography. PCE solutions with concentrations from 0 to 40% were measured using the Carr–Purcell–Meiboom–Gill sequence by 1H low-field NMR. The results showed that the T2 value of the main peak has a linear relation with the PCE concentration. The signal intensity of peaks whose T2 values are smaller than 10 ms of the PCE solutions with a concentration of 20% is linearly correlated to the molecule weight of PCEs.

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Authors and Affiliations

  1. Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering at Tongji University, Shanghai, 201804, China

    Y. Ji, Zh. Sun, M. Pang & J. Yang

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  1. Y. Ji
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  2. Zh. Sun
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  3. M. Pang
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  4. J. Yang
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Corresponding authors

Correspondence to Y. Ji or Zh. Sun.

Additional information

Published in Zhurnal Prikladnoi Spektroskopii, Vol. 88, No. 2, pp. 255–260, March–April, 2021.

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Ji, Y., Sun, Z., Pang, M. et al. Application of 1H Low-Field NMR Spectroscopy for the Determination of the Concentration and Molecule Weight of Polycarboxylate Superplasticizers. J Appl Spectrosc 88, 317–322 (2021). https://doi.org/10.1007/s10812-021-01176-6

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  • DOI: https://doi.org/10.1007/s10812-021-01176-6

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