Influential factors on the level of spalling in fire exposed concrete
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The aim of this research is investigating the influential factors governing the level of concrete spalling at a material level. Fromthe former research on concrete spalling under the fire conditions, many available mechanisms have been provided andrecently, the spalling damage of concrete has been explained as a result of high inner pressure due to the evaporation of thewater in concrete microstructure. Based on the spalling mechanism, this study prepared various concrete specimens made withdifferent water-to-binder ratios, air contents, moisture contents, aggregate sizes, aggregate types and supplementarycementitious material (SCM) to investigate the governing factors on spalling of concrete. From the investigation, the factorswhich can cause pore connectivity, easiness of cracking, and moisture content of the concrete microstructure were governingfactors on spalling damage. Therefore, in this research, based on the results of the investigation it was possible to providecritical factors on spalling damage of the concrete, and it is expected that the data obtained from this study can provide usefulinformation for the design of fire resistant concrete.
Abstract
The aim of this research is investigating the influential factors governing the level of concrete spalling at a material level. Fromthe former research on concrete spalling under the fire conditions, many available mechanisms have been provided andrecently, the spalling damage of concrete has been explained as a result of high inner pressure due to the evaporation of thewater in concrete microstructure. Based on the spalling mechanism, this study prepared various concrete specimens made withdifferent water-to-binder ratios, air contents, moisture contents, aggregate sizes, aggregate types and supplementarycementitious material (SCM) to investigate the governing factors on spalling of concrete. From the investigation, the factorswhich can cause pore connectivity, easiness of cracking, and moisture content of the concrete microstructure were governingfactors on spalling damage. Therefore, in this research, based on the results of the investigation it was possible to providecritical factors on spalling damage of the concrete, and it is expected that the data obtained from this study can provide usefulinformation for the design of fire resistant concrete.
참고문헌 (19)
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