Numerical analysis of heating rate effect on spalling of high-performance concrete under high temperature conditions

Zhao, J.; Zheng, J.; Peng, Gai Fei; van Breugel, K.

doi:10.1016/j.conbuildmat.2017.07.023

Numerical analysis of heating rate effect on spalling of high-performance concrete under high temperature conditions

Title

Numerical analysis of heating rate effect on spalling of high-performance concrete under high temperature conditions

Author

Zhao, J. (Beijing Jiaotong University)
Zheng, J. (Zhejiang University)
Peng, Gai Fei (Beijing Jiaotong University)
van Breugel, K. (TU Delft Materials and Environment)

Date

2017-10-15

Abstract

High-performance concrete (HPC) is vulnerable to spalling under high temperature conditions and it has been found that the heating rate can exert a tremendous effect on spalling of HPC. To prevent HPC from spalling, the heating rate effect should be understood. However, quantitative analyses are still lacking and the heating rate effect has not been well interpreted so far. In this paper, a numerical analysis of the heating rate effect on spalling of HPC is presented. Based on the experimental results reported in the literature, the spalling behavior of cubic HPC specimens under fire heating and slow heating with a heating rate of 5 °C/min is modeled. With a meso-level thermo-chemo-hydro-mechanical analysis, the temperature gradient induced thermal stress and the mechanical effect of build-up vapor pressure are investigated. The results show that, at different heating rates, the spalling mechanisms are different. Finally, possible manners and mechanisms of spalling are discussed.

Subject

Heating rate
High temperature
High-performance concrete
Spalling

To reference this document use:

http://resolver.tudelft.nl/uuid:4380c8b8-eb02-4429-840b-0b240c69c3cd

DOI

https://doi.org/10.1016/j.conbuildmat.2017.07.023

Embargo date

2019-07-08

ISSN

0950-0618

Source

Construction and Building Materials, 152, 456-466