Monitoring the setting process of alkali-activated slag-fly ash cements with ultrasonic P-wave velocity

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چکیده

• Setting behavior of AASF cements is studied by using UPV measurements. Early-age reaction process monitored ultrasonic Specific ranges are suggested to estimate the setting time in cements. One shortcomings alkali-activated materials concrete applications quick that has been poorly understood. The objective this study explore sodium silicate-activated slag-fly ash P-wave velocity. effect incorporating carbonate and sulfate on samples also investigated. results show partial substitution silicate with activators no noticeable initial time, while final increases significantly. Comparative assessment measurements Vicat times calorimetry heat flow curves shows condensation between aluminosilicate units formed near particle surface most likely responsible for setting. A specific velocity range can be used

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ژورنال

عنوان ژورنال: Construction and Building Materials

سال: 2021

ISSN: ['1879-0526', '0950-0618']

DOI: https://doi.org/10.1016/j.conbuildmat.2020.121592