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Probing development of microstructure of early cement paste using 1H low-field NMR

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Abstract

Development of microstructure of early cement paste (0–6 h) was investigated with 1H low-field NMR. It was found that T 2 (transverse relaxation time) distributions of fresh cement paste were bimodal and two peaks were ‘long component’ and ‘short component’. Separation degree of two peaks was a sign of exchange of water within flocculation and outside flocculation. Factors such as water cement ratio, specific surface area and dosage of superplasticizer had influences on the separation degree: the separation degree increased with the water cement ratio; the separation degree of cement paste prepared with cement with a high specific surface area was zero; dosage of superplasticizer will decrease separation degree. Results also suggested that T 2 distribution gradually moved to the left and T 2 of long component and initial fluidity were linearly correlated.

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Authors and Affiliations

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

    Yang Yu  (俞洋), Zhenping Sun  (孙振平) & Min Pang

  2. Shanghai Niumag Corporation, Shanghai, 200333, China

    Peiqiang Yang

Authors
  1. Yang Yu  (俞洋)
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  2. Zhenping Sun  (孙振平)
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  3. Min Pang
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  4. Peiqiang Yang
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Corresponding author

Correspondence to Zhenping Sun  (孙振平).

Additional information

Funded by the National Natural Science Foundation of China (No. 51178339), and the National Basic Research Program (No. 2009CB623104-5)

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Yu, Y., Sun, Z., Pang, M. et al. Probing development of microstructure of early cement paste using 1H low-field NMR. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 963–967 (2013). https://doi.org/10.1007/s11595-013-0801-7

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  • DOI: https://doi.org/10.1007/s11595-013-0801-7

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