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Influence of Curing Regime on Resistance of Ultra-High Performance Concrete to Explosive Spalling Under High Temperature
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Xujing NIU1, 2, Ying NIE3, Gaifei PENG2, Yajie SHANG4, Hong DING5, Weifeng QU5
Journal of the Chinese Ceramic Society | 2020, 48(8) : 1212 - 1222
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Journal of the Chinese Ceramic Society | 2020, 48(8): 1212-1222
• Special Issue for Ultra-high Performance ConcreteⅠ •
Influence of Curing Regime on Resistance of Ultra-High Performance Concrete to Explosive Spalling Under High Temperature
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Xujing NIU1, 2, Ying NIE3, Gaifei PENG2, Yajie SHANG4, Hong DING5, Weifeng QU5
Affiliations
  • 1.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
  • 2.Faculty of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
  • 3.Beijing Uni-Construction Group Co., Ltd., Beijing 100061, China
  • 4.Beijing New Aerotropolis Holdings Co., Ltd., Beijing 102602, China
  • 5.Beijing Construction Engineering Group (BCEG), Hengjun Engineering Detection Co., Ltd., Beijing 102612, China

    • NIU Xujing (1989-), female, Ph.D. E-mail:

About Author:

NIU Xujing (1989-), female, Ph.D. E-mail:

Published: 2020-08-20 doi: 10.14062/j.issn.0454-5648.20200233
Outline
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Explosive spalling behavior and microstructure of ultra-high performance concrete (UHPC) prepared with four different curing regimes (i.e., 20 ℃ water curing, hot water curing, dry air heating and hot water-dry air combined curing) were investigated. The results indicate that the combined curing is efficient to enhance resistance of UHPC to explosive spalling under high temperature. No spalling occurs on the UHPC cured by 90 ℃ hot water curing for 2 d and 250 ℃ dry air heating for 3 d. Such a combined curing is a novel approach to prevent explosive spalling of UHPC at elevated temperature, which is different from adding polypropylene fiber usually employed. It can be attributed to an internal free water minimizing mechanism. During dry air heating within the combined curing, a high-temperature steam environment can be established inside UHPC. Thus, further hydration of residual cement and pozzolanic reaction of mineral admixtures both can be activated to form massive dense hydrates. Meanwhile, most of internal free water has been consumed, so that the vapor pressure inside UHPC under high temperature is decreased, hence prohibiting the spalling occurrence efficiently.

ultra-high performance concrete  /  combined curing  /  explosive spalling under high temperature  /  microstructure  /  free water
牛旭婧, 乜颖, 朋改非, 尚亚杰, 丁宏, 曲维峰. 养护制度对超高性能混凝土抗高温爆裂性能的影响. 硅酸盐学报, 2020 , 48 (8) : 1212 -1222 . DOI: 10.14062/j.issn.0454-5648.20200233
Xujing NIU, Ying NIE, Gaifei PENG, Yajie SHANG, Hong DING, Weifeng QU. Influence of Curing Regime on Resistance of Ultra-High Performance Concrete to Explosive Spalling Under High Temperature[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (8) : 1212 -1222 . DOI: 10.14062/j.issn.0454-5648.20200233
Appendix
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Year 2020 volume 48 Issue 8
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Article Info
doi: 10.14062/j.issn.0454-5648.20200233
  • Receive Date：2020-03-31
  • Online Date：2026-10-29
  • Published：2020-08-20
Article Data
Affiliations
History
  • Received：2020-03-31
  • Revised：2020-04-18
Funding
Affiliations
    1.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
    2.Faculty of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
    3.Beijing Uni-Construction Group Co., Ltd., Beijing 100061, China
    4.Beijing New Aerotropolis Holdings Co., Ltd., Beijing 102602, China
    5.Beijing Construction Engineering Group (BCEG), Hengjun Engineering Detection Co., Ltd., Beijing 102612, China

Corresponding:

PENG Gaifei (1966-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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