Journal
MATERIALS AND STRUCTURES
Volume 53, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1617/s11527-020-01505-9
Keywords
Alkali activated cement; Hydration; Reaction; Granulated blast-furnace slag
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Funding
- National Research Foundation of Korea [2019R1A4A1028116, 2020R1A2C4002107]
- Chosun University
- National Research Foundation of Korea [2019R1A4A1028116, 2020R1A2C4002107] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The present study investigates the correlation between the degree of reaction (DoR) and hydration (DoH) of alkali-activated slag cements, prepared using a sodium silicate activator. The DoR of samples was measured by employing multiple techniques including(29)Si magic-angle-spinning nuclear magnetic resonance spectroscopy, scanning electron microscopy image analysis, and selective dissolution, while the DoH was quantified by bound water measurement of samples dried via various drying methods. Due to experimental errors it is recommended that the DoR is described using regression as a function of time, rather than directly using experimentally-obtained values. The DoH values obtained from the measurement of bound water content showed a linear relationship with the DoR values measured by selective dissolution within 20% error margin. From this, it is expected that DoR can be inferred from DoH values obtained by the drying method, which is much easier than selective dissolution.
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