Accelerated protocol for measurement of carbonation through a crack surface

Laura Sullivan-Green; William Hime; Charles Dowding

doi:10.1016/j.cemconres.2007.02.019

Accelerated protocol for measurement of carbonation through a crack surface

Laura Sullivan-Green^*, William Hime, Charles Dowding

^*Corresponding author for this work

Civil and Environmental Engineering

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

13 Scopus citations

Abstract

This paper introduces a method for accelerating experiments to quantify gaseous carbonation of cementitious materials through a sheltered crack surface. To date the majority of measurements of carbonation have focused upon the determination of the carbonation reaction through an open material face with no restriction to gaseous exposure. Experiments to determine the extent of carbonation through a crack surface can verify the extent to which restrictions of gaseous exposure can alter rates of carbonation into the crack surface as well as the depth into the crack to which the reaction occurs. The paper demonstrates that with experimental data the accelerated protocol can produce differences in outcomes in time intervals that are short relative to those in which the reaction occurs naturally. The experiment conducted to demonstrate the viability of the accelerated protocol involved measuring differences in the penetration of carbonation into the crack surface that resulted from differences in crack width. A byproduct of this experiment was a measurement of the depth into the crack (from the material face) to which carbonation occurs. It is not the intent of the paper to develop a theory of rates of carbonation, but rather to demonstrate that statistical differences are obtainable with the accelerated protocol.

Original language	English (US)
Pages (from-to)	916-923
Number of pages	8
Journal	Cement and Concrete Research
Volume	37
Issue number	6
DOIs	https://doi.org/10.1016/j.cemconres.2007.02.019
State	Published - Jun 2007

Funding

This research was supported by the Infrastructure Technology Institute at Northwestern University, which is funded by a block grant from the U.S. Department of Transportation. The help of Margaret Reed of Wiss, Janney, Elstner Associates Inc. on the practicalities of carbonation measurement is greatly appreciated. Special thanks is also extended to the staff in the Northwestern University Department of Civil and Environmental Engineering, especially Dave Ventre and John Chirayil, for their assistance with specimen preparation and testing.

Keywords

Acceleration
Carbonation
Fly ash

ASJC Scopus subject areas

Building and Construction
General Materials Science

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10.1016/j.cemconres.2007.02.019

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title = "Accelerated protocol for measurement of carbonation through a crack surface",

abstract = "This paper introduces a method for accelerating experiments to quantify gaseous carbonation of cementitious materials through a sheltered crack surface. To date the majority of measurements of carbonation have focused upon the determination of the carbonation reaction through an open material face with no restriction to gaseous exposure. Experiments to determine the extent of carbonation through a crack surface can verify the extent to which restrictions of gaseous exposure can alter rates of carbonation into the crack surface as well as the depth into the crack to which the reaction occurs. The paper demonstrates that with experimental data the accelerated protocol can produce differences in outcomes in time intervals that are short relative to those in which the reaction occurs naturally. The experiment conducted to demonstrate the viability of the accelerated protocol involved measuring differences in the penetration of carbonation into the crack surface that resulted from differences in crack width. A byproduct of this experiment was a measurement of the depth into the crack (from the material face) to which carbonation occurs. It is not the intent of the paper to develop a theory of rates of carbonation, but rather to demonstrate that statistical differences are obtainable with the accelerated protocol.",

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author = "Laura Sullivan-Green and William Hime and Charles Dowding",

note = "Funding Information: This research was supported by the Infrastructure Technology Institute at Northwestern University, which is funded by a block grant from the U.S. Department of Transportation. The help of Margaret Reed of Wiss, Janney, Elstner Associates Inc. on the practicalities of carbonation measurement is greatly appreciated. Special thanks is also extended to the staff in the Northwestern University Department of Civil and Environmental Engineering, especially Dave Ventre and John Chirayil, for their assistance with specimen preparation and testing.",

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N2 - This paper introduces a method for accelerating experiments to quantify gaseous carbonation of cementitious materials through a sheltered crack surface. To date the majority of measurements of carbonation have focused upon the determination of the carbonation reaction through an open material face with no restriction to gaseous exposure. Experiments to determine the extent of carbonation through a crack surface can verify the extent to which restrictions of gaseous exposure can alter rates of carbonation into the crack surface as well as the depth into the crack to which the reaction occurs. The paper demonstrates that with experimental data the accelerated protocol can produce differences in outcomes in time intervals that are short relative to those in which the reaction occurs naturally. The experiment conducted to demonstrate the viability of the accelerated protocol involved measuring differences in the penetration of carbonation into the crack surface that resulted from differences in crack width. A byproduct of this experiment was a measurement of the depth into the crack (from the material face) to which carbonation occurs. It is not the intent of the paper to develop a theory of rates of carbonation, but rather to demonstrate that statistical differences are obtainable with the accelerated protocol.

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KW - Fly ash

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Accelerated protocol for measurement of carbonation through a crack surface

Abstract

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