Monitoring the Influence of Aminosilane on Cement Hydration Via Low-field NMR Relaxometry
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Nuclear magnetic resonance (NMR) relaxometry is used here as a noninvasive tool to monitor the influence introduced by the addition of 3-Aminopropyltriethoxysilane (APTES) on the hydration of pure cement paste and a cement paste containing quartz powder. It is observed extension of the dormancy stage up to 12 h in the presence of the aminosilane and a slight reduction in the size of capillary pores. The extension of the dormancy stage can be also associated with a slower hydration process which leads to enhancement of the final flexural strength in the case of sample containing quartz.
KeywordsFlexural Strength Cement Paste Hydration Process Ground Granulate Blast Furnace Slag Aminosilane
This work was supported by a grant of the Romanian National Authority for Scientific Research, CNCS– UEFISCDI, project number PN-II-ID-PCE-2011-3-0238.