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Effect of New Hardening Accelerator on the Strength of Segment Concrete

  • Cementitious materials
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Abstract

A novel crystal nucleus-based cement-hardening accelerator was evaluated using various mortar and segment concrete experiments. The mechanism of hardening acceleration was investigated via hydration temperature variation analysis, hydration degree analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM). In the presence of accelerator, the fluidity loss of mortar was increased after 30 minuites, and a coagulation was also observed. Moreover, based on the image of SEM, the formation of C-S-H gels was enhanced in the early hydration. As a result, the hardening accelerator could significantly boost the early strength of concrete, especially within one day of pouring, and shorten steam curing time to meet the demolding strength.

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Authors and Affiliations

  1. School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Zuiliang Deng  (邓最亮) & Guimin Lu  (路贵民)

  2. Technical Center, Shanghai Engineering Research Center of Construction Admixtures, Shanghai, 200231, China

    Weishan Wang, Lefeng Fu & Baicun Zheng

  3. Technical Center, Shanghai Sunrise Polymer Material Co., Ltd., Shanghai, 200231, China

    Zuiliang Deng  (邓最亮), Weishan Wang, Lefeng Fu & Baicun Zheng

Authors
  1. Zuiliang Deng  (邓最亮)
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  2. Weishan Wang
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  3. Guimin Lu  (路贵民)
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  4. Lefeng Fu
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  5. Baicun Zheng
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Corresponding author

Correspondence to Guimin Lu  (路贵民).

Additional information

Funded by Star Program (No.1804QB1403200) from Science and Technology Commission of Shanghai Municipality

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Deng, Z., Wang, W., Lu, G. et al. Effect of New Hardening Accelerator on the Strength of Segment Concrete. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 36, 387–391 (2021). https://doi.org/10.1007/s11595-021-2421-y

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  • DOI: https://doi.org/10.1007/s11595-021-2421-y

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