Measuring Volume Change of Alkali-Activated Slag Pastes in Early Stage by Using Helium Pycnometry
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 11
Abstract
In the present study, alkali-activated slag (AAS) pastes were prepared using slag and water glass with different modulus, and the effect of a modulus of water glass on the volume change of the AAS pastes was investigated using helium pycnometry (HP) combined with isothermal calorimetry. The initial 24 h of the hydration process are divided into four stages based on the volume changes and heat flow. The AAS has a high shrinkage rate during the acceleration and deceleration periods, and the modulus had a significant influence on the shrinkage rate. This study reveals that HP is a fully automated and continuity method for determining the volume changes of AAS in early hydration.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
This work was funded by the National and Technology Program During the 13th 5-year Plan Period (Grant No.2016YFC0701004) National Natural Science Joint Foundation of China (Grant No. U1534207) and National Natural Science Foundation of China (Grant No. 51678441).
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 11 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 24, 2019
Accepted: May 29, 2019
Published online: Aug 19, 2019
Published in print: Nov 1, 2019
Discussion open until: Jan 19, 2020
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