Using ultrasonic wave reflection to monitor false set of cement paste

Chul Woo Chung; Prannoy Suraneni; John S. Popovics; Leslie J. Struble

doi:10.1016/j.cemconcomp.2017.08.010

Using ultrasonic wave reflection to monitor false set of cement paste

Chul Woo Chung, Prannoy Suraneni, John S. Popovics, Leslie J. Struble

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

Abstract

The standard mechanical penetration approach for monitoring cement paste stiffening (Vicat needle method, ASTM C191) does not distinguish responses associated with false set of cement paste caused by secondary gypsum formation. The objective of this research is to determine whether ultrasonic wave reflection, using a testing set up with high measurement sensitivity, could be used to monitor false set of cement paste. Penetration resistance, P-wave, and S-wave reflection coefficients were measured on cement pastes with water-to-cement ratio 0.5. The S-wave reflection coefficient showed a sharp and abrupt linear drop associated with secondary gypsum formation, thereby indicating that S-wave ultrasonic wave reflection can be used to monitor false set of cement pastes. False set could not be distinguished in penetration resistance or P-wave UWR test data.

Original language	English (US)
Pages (from-to)	10-18
Number of pages	9
Journal	Cement and Concrete Composites
Volume	84
DOIs	https://doi.org/10.1016/j.cemconcomp.2017.08.010
State	Published - Nov 2017

Keywords

False set
Penetration resistance
Secondary gypsum
Set
Ultrasonic wave reflection

ASJC Scopus subject areas

Building and Construction
General Materials Science

Online availability

10.1016/j.cemconcomp.2017.08.010

Library availability

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title = "Using ultrasonic wave reflection to monitor false set of cement paste",

abstract = "The standard mechanical penetration approach for monitoring cement paste stiffening (Vicat needle method, ASTM C191) does not distinguish responses associated with false set of cement paste caused by secondary gypsum formation. The objective of this research is to determine whether ultrasonic wave reflection, using a testing set up with high measurement sensitivity, could be used to monitor false set of cement paste. Penetration resistance, P-wave, and S-wave reflection coefficients were measured on cement pastes with water-to-cement ratio 0.5. The S-wave reflection coefficient showed a sharp and abrupt linear drop associated with secondary gypsum formation, thereby indicating that S-wave ultrasonic wave reflection can be used to monitor false set of cement pastes. False set could not be distinguished in penetration resistance or P-wave UWR test data.",

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AU - Chung, Chul Woo

AU - Suraneni, Prannoy

AU - Popovics, John S.

AU - Struble, Leslie J.

PY - 2017/11

Y1 - 2017/11

N2 - The standard mechanical penetration approach for monitoring cement paste stiffening (Vicat needle method, ASTM C191) does not distinguish responses associated with false set of cement paste caused by secondary gypsum formation. The objective of this research is to determine whether ultrasonic wave reflection, using a testing set up with high measurement sensitivity, could be used to monitor false set of cement paste. Penetration resistance, P-wave, and S-wave reflection coefficients were measured on cement pastes with water-to-cement ratio 0.5. The S-wave reflection coefficient showed a sharp and abrupt linear drop associated with secondary gypsum formation, thereby indicating that S-wave ultrasonic wave reflection can be used to monitor false set of cement pastes. False set could not be distinguished in penetration resistance or P-wave UWR test data.

AB - The standard mechanical penetration approach for monitoring cement paste stiffening (Vicat needle method, ASTM C191) does not distinguish responses associated with false set of cement paste caused by secondary gypsum formation. The objective of this research is to determine whether ultrasonic wave reflection, using a testing set up with high measurement sensitivity, could be used to monitor false set of cement paste. Penetration resistance, P-wave, and S-wave reflection coefficients were measured on cement pastes with water-to-cement ratio 0.5. The S-wave reflection coefficient showed a sharp and abrupt linear drop associated with secondary gypsum formation, thereby indicating that S-wave ultrasonic wave reflection can be used to monitor false set of cement pastes. False set could not be distinguished in penetration resistance or P-wave UWR test data.

KW - False set

KW - Penetration resistance

KW - Secondary gypsum

KW - Set

KW - Ultrasonic wave reflection

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Using ultrasonic wave reflection to monitor false set of cement paste

Abstract

Keywords

ASJC Scopus subject areas

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