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Materials and Structures

, Volume 44, Issue 1, pp 361–376 | Cite as

Study on mechanism of thermal spalling in concrete exposed to elevated temperatures

  • Yufang Fu
  • Lianchong Li
Original Article

Abstract

This paper presents a review of explosive spalling of concrete at elevated temperatures. The affecting factors, mechanisms and current theoretical and experimental studies are summarized. Using a numerical model proposed by the authors, numerical simulations were performed to investigate the effects of the thermally cracking process considering the effects of heterogeneity of the material properties on the spalling in concrete exposed to a transient thermal load. The investigations showed that the thermal cracking is the key factor causing the corner and surface spalling, and suggested that a coupling of thermal cracking and pore pressure is the main cause of explosive spalling and uncertainty of explosive spalling. The explosive spalling induced by elevated temperatures is a complex nonlinear problem, which can be understood only through establishing a methodology using behavioral aspects for both material science and mechanics.

Keywords

Elevated temperatures Spalling Thermal cracks Pore pressure Thermal stress 

Notes

Acknowledgements

The work presented in this paper was financially supported by National Natural Science Funds, P.R. China (Grant No. 50778084, 50408029 and No. 50778046).

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Copyright information

© RILEM 2010

Authors and Affiliations

  1. 1.Research Institute of Highway, MOTBeijingChina
  2. 2.Key Laboratory of Bridge Detection and Reinforcement Technology, MOTBeijingChina
  3. 3.Dalian University of Technology, School of Civil and Hydraulic EngineeringDalianChina

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