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

67 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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10.1016/j.conbuildmat.2013.11.007

Cite this

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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.",

keywords = "Connectivity, High temperature, High-strength concrete, Microstructure, Non-destructive evaluation, Re-curing, X-ray CT",

author = "Michael Henry and Darma, {Ivan Sandi} and Takafumi Sugiyama",

note = "Funding Information: This research was partially supported by the Japan Society for the Promotion of Science (Scientific Research B, no. 23360187 ). ",

year = "2014",

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language = "English",

volume = "67",

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journal = "Construction and Building Materials",

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T1 - Analysis of the effect of heating and re-curing on the microstructure of high-strength concrete using X-ray CT

AU - Henry, Michael

AU - Darma, Ivan Sandi

AU - Sugiyama, Takafumi

N1 - Funding Information: This research was partially supported by the Japan Society for the Promotion of Science (Scientific Research B, no. 23360187 ).

PY - 2014

Y1 - 2014

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.

KW - Connectivity

KW - High temperature

KW - High-strength concrete

KW - Microstructure

KW - Non-destructive evaluation

KW - Re-curing

KW - X-ray CT

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JF - Construction and Building Materials

SN - 0950-0618

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

Abstract

Keywords

ASJC Scopus subject areas

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