Analysis of the effect of heating and re-curing on the microstructure of high-strength concrete using X-ray CT

Michael Henry; Ivan Sandi Darma; Takafumi Sugiyama

doi:10.1016/j.conbuildmat.2013.11.007

Analysis of the effect of heating and re-curing on the microstructure of high-strength concrete using X-ray CT

Michael Henry, Ivan Sandi Darma, Takafumi Sugiyama

Research output: Contribution to journal › Article › peer-review

62 Citations (Scopus)

Abstract

Microstructure recovery plays an important role in restoring the performance of concrete damaged by fire. This research applied X-ray CT and image analysis techniques to non-destructively examine the internal microstructure of high-strength concrete in order to clarify the effects of heating and re-curing on microstructure characteristics. Heating caused an increase in total pore space due to an increase in connectivity caused by the formation of cracks in the mortar-aggregate interface and bridging cracks. Water re-curing, however, was effective in recovering microstructure through the reduction in connected pore space, with most recovery occurring within 7 days.

Original language	English
Pages (from-to)	37-46
Number of pages	10
Journal	Construction and Building Materials
Volume	67
DOIs	https://doi.org/10.1016/j.conbuildmat.2013.11.007
Publication status	Published - 2014
Externally published	Yes

Keywords

Connectivity
High temperature
High-strength concrete
Microstructure
Non-destructive evaluation
Re-curing
X-ray CT

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Materials Science(all)

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title = "Analysis of the effect of heating and re-curing on the microstructure of high-strength concrete using X-ray CT",

abstract = "Microstructure recovery plays an important role in restoring the performance of concrete damaged by fire. This research applied X-ray CT and image analysis techniques to non-destructively examine the internal microstructure of high-strength concrete in order to clarify the effects of heating and re-curing on microstructure characteristics. Heating caused an increase in total pore space due to an increase in connectivity caused by the formation of cracks in the mortar-aggregate interface and bridging cracks. Water re-curing, however, was effective in recovering microstructure through the reduction in connected pore space, with most recovery occurring within 7 days.",

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AU - Henry, Michael

AU - Darma, Ivan Sandi

AU - Sugiyama, Takafumi

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N2 - Microstructure recovery plays an important role in restoring the performance of concrete damaged by fire. This research applied X-ray CT and image analysis techniques to non-destructively examine the internal microstructure of high-strength concrete in order to clarify the effects of heating and re-curing on microstructure characteristics. Heating caused an increase in total pore space due to an increase in connectivity caused by the formation of cracks in the mortar-aggregate interface and bridging cracks. Water re-curing, however, was effective in recovering microstructure through the reduction in connected pore space, with most recovery occurring within 7 days.

AB - Microstructure recovery plays an important role in restoring the performance of concrete damaged by fire. This research applied X-ray CT and image analysis techniques to non-destructively examine the internal microstructure of high-strength concrete in order to clarify the effects of heating and re-curing on microstructure characteristics. Heating caused an increase in total pore space due to an increase in connectivity caused by the formation of cracks in the mortar-aggregate interface and bridging cracks. Water re-curing, however, was effective in recovering microstructure through the reduction in connected pore space, with most recovery occurring within 7 days.

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KW - High temperature

KW - High-strength concrete

KW - Microstructure

KW - Non-destructive evaluation

KW - Re-curing

KW - X-ray CT

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