Please use this identifier to cite or link to this item: https://doi.org/10.1520/JTE103819
Title: Image analysis technique for monitoring early age shrinkage strains with depth from the top surface of monolithic cementitious prism specimens
Authors: Ong, K.C.G. 
Chandra, L.R.
Keywords: Early age
Image analysis
Moisture loss
Shrinkage
Issue Date: Sep-2011
Source: Ong, K.C.G., Chandra, L.R. (2011-09). Image analysis technique for monitoring early age shrinkage strains with depth from the top surface of monolithic cementitious prism specimens. Journal of Testing and Evaluation 39 (5) : -. ScholarBank@NUS Repository. https://doi.org/10.1520/JTE103819
Abstract: This paper describes the use of the image analysis technique for monitoring the variation of early age shrinkage strains with respect to the depth from the top surface of ordinary Portland cement mortar and concrete prism specimens starting as early as 30 min after adding water to the mixture. The applicability of the image analysis technique was demonstrated on both sealed and unsealed cementitious prism specimens. As expected, in situations where the top trowelled surface is protected from moisture loss, the shrinkage strains are similar with depth from the top trowelled surface. On the other hand, magnitudes of shrinkage strains monitored vary with depth when the top trowelled surface is exposed to a dry environment from an early age. The results also showed that the effect of settlements on early age shrinkage strains monitored can be minimized by adopting the current image analysis testing arrangement. Furthermore, when the early age shrinkage strains monitored using the image analysis technique were benchmarked against the results obtained via laser sensors, comparable shrinkage strains values were observed on the sealed prism specimen. On the other hand, the laser sensors were found to provide an "average" value of shrinkage strains that develop across the whole cross section of the unsealed prism specimen. Copyright © 1996-2011 ASTM. All Rights Reserved.
Source Title: Journal of Testing and Evaluation
URI: http://scholarbank.nus.edu.sg/handle/10635/59078
ISSN: 00903973
DOI: 10.1520/JTE103819
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

1
checked on Dec 6, 2017

WEB OF SCIENCETM
Citations

1
checked on Nov 21, 2017

Page view(s)

47
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.