Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162316
Title: Heat of hydration, bleeding, viscosity, setting of Ca(OH)<inf>2</inf>-GGBS and MgO-GGBS grouts
Authors: Yu, Hua
Yi, Yaolin
Unluer, Cise
Keywords: Engineering::Civil engineering
Issue Date: 2021
Source: Yu, H., Yi, Y. & Unluer, C. (2021). Heat of hydration, bleeding, viscosity, setting of Ca(OH)<inf>2</inf>-GGBS and MgO-GGBS grouts. Construction and Building Materials, 270, 121839-. https://dx.doi.org/10.1016/j.conbuildmat.2020.121839
Project: M4081914.030
Journal: Construction and Building Materials
Abstract: Hydrated lime (Ca(OH)2)- and reactive magnesia (MgO)-activated ground granulated blast-furnace slag (GGBS) have shown advantages in geotechnical applications compared with Portland cement (PC). To apply these two novel binders in slurry form to field applications, the properties of their grouts need to be investigated, which is the objective of this study. The heat of hydration, bleeding, viscosity, and setting behavior of Ca(OH)2-GGBS and MgO-GGBS grouts were investigated and compared with PC and pure GGBS grouts in this study. All grouts indicated a decrease in bleeding and setting time, but an increase in viscosity with decreasing the water/cementitious material (W/C) ratio. Compared with the PC grout, the pure GGBS grout with the same W/C ratio demonstrated higher bleeding and setting time, and lower heat rate and viscosity. Bleeding and setting time decreased and peak heat rate and viscosity increased with an increase in the activator (Ca(OH)2 or MgO)/GGBS ratio within GGBS-based grouts. The peak heat rate in Ca(OH)2-GGBS grouts was higher than that of pure GGBS or Ca(OH)2 grout, indicating that Ca(OH)2 was effective on activating hydration of GGBS. The peak heat rate in MgO-GGBS grouts was significantly lower than MgO grout and the heat rate was limited after 8 h. The bleeding and setting times of MgO-GGBS grouts were significantly lower than those of Ca(OH)2-GGBS grouts, which was primarily attributed to the hydration of MgO.
URI: https://hdl.handle.net/10356/162316
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2020.121839
Rights: © 2020 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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