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Effect of curing conditions on the durability of ultra-high performance concrete under flexural load

  • Cementitious Materials
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Abstract

We experimentally investigated the effect of curing conditions on the durability of UHPC under flexural load. Moreover, the mechanisms of the effect of curing conditions were revealed from the microstructural point of view with environmental scanning electron microscopy (ESEM) and X-ray computerized tomography (X-ray CT). The experimental results show that the flexural load has negative influence on the durability of UHPC, but UHPC still exhibits excellent durability under flexural load. Besides, the curing conditions do show influences on the durability of UHPC. Compared with standard and steam curing, oven curing led to a lower chloride resistance and freeze-thaw performance of UHPC. The microstructure of UHPC paste was detected with ESEM. It is revealed that, compared with standard and steam cured UHPC, the lower reaction degree and internal microcracks are the causes for the lower chloride resistance of oven cured UHPC. The defects distribution in UHPC before and after freeze-thaw action was investigated with X-ray CT. The number of defects in oven cured UHPC increases the fastest during the freeze-thaw action due to its more defective microstructure

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Authors and Affiliations

  1. School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China

    Chunping Gu  (顾春平), Wei Sun, Liping Guo  (郭丽萍) & Qiannan Wang

  2. Jiangsu Key Laboratory of Construction Material, Nanjing, 211189, China

    Chunping Gu  (顾春平), Wei Sun, Liping Guo  (郭丽萍) & Qiannan Wang

  3. Collaborative Innovation Center for Advanced Civil Engineering Materials, Nanjing, 211189, China

    Wei Sun & Liping Guo  (郭丽萍)

Authors
  1. Chunping Gu  (顾春平)
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  2. Wei Sun
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  3. Liping Guo  (郭丽萍)
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  4. Qiannan Wang
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Corresponding author

Correspondence to Liping Guo  (郭丽萍).

Additional information

Funded by the National Natural Science Foundation of China (No. 51378113) and the Fundamental Research Funds for the Central Universities (No. 3212002206)

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Gu, C., Sun, W., Guo, L. et al. Effect of curing conditions on the durability of ultra-high performance concrete under flexural load. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 278–285 (2016). https://doi.org/10.1007/s11595-016-1365-0

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  • DOI: https://doi.org/10.1007/s11595-016-1365-0

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