Reactivity Assessment of Supplementary Cementitious Materials and Their Binary Blends Using Test
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 2
Abstract
The suitability of the rapid, relevant, and reliable () heat of hydration and bound water tests for measuring the reactivity of various supplementary cementitious materials (SCMs) and their blends with calcium hydroxide (CH) was investigated in this study. These tests have been recently standardized in current standards. The test was carried out on pastes of fly ash (FA), slag (S), kaolinitic calcined clay (K), limestone (LS), and their blends. A detailed analysis of the heat of hydration and bound water measurements specified according to the test was carried out. A good correlation was found between the two types of test results and also between the reactivity test results versus strength activity index measured using cement mortar compressive strength. The formation of hydration products in the test paste specimens was also studied using X-ray diffraction (XRD). The hydration products for SCMs formed in the test were similar to those reported in cement systems. It was seen that the interactions in the blended SCMs with CH were also similar to those reported in cement pastes. Further, the microstructure of the specimen was studied using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analysis, and the overall hydration of various SCMs was studied. The influence of the proportions of the SCMs in the blended SCMs and that of fineness were also investigated. The applicability and limitations of this test method for SCMs and their blends were discussed.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research leading to these results received financial funding from the Swiss Agency for Development and Cooperation (SDC) under Grant No. 7F-08527.01.02.
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Journal of Materials in Civil Engineering
Volume 35 • Issue 2 • February 2023
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© 2022 American Society of Civil Engineers.
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Received: Nov 5, 2021
Accepted: May 31, 2022
Published online: Dec 1, 2022
Published in print: Feb 1, 2023
Discussion open until: May 1, 2023
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Cited by
- Anuj Parashar, Vineet Shah, Satya Medepalli, Shashank Bishnoi, Improving the Performance of Fly Ash–Portland Cement with Limestone Calcined Clay, Journal of Materials in Civil Engineering, 10.1061/JMCEE7.MTENG-17545, 36, 8, (2024).