Abstract
This paper aims at investigating the effect of water-to-binder (W/B) ratio on cementing efficiency factor (k-value) of low-calcium fly ash with regard to strength development of concrete. All specimens were prepared with two W/B ratios of 0.30 and 0.50 and the fly ash was used to replace a part of cement at ratios of 0, 20, 30, and 40% by mass. At the ages of 3, 7, 28, 91, and 182 days, compressive strength of concrete was examined, whereas degree of fly ash reaction and portlandite content in paste specimens were measured by selective dissolution method and thermogravimetry and differential thermal analysis, respectively. The results showed that a lower W/B ratio yielded a higher k-value of fly ash at the ages of 3 and 7 days, while the k-value increased with an increase in the degree of fly ash reaction up to 182 days.
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Huynh, P.T., Bui, P.T., Ogawa, Y., Kawai, K. (2020). Effect of Water-to-Binder Ratio on Cementing Efficiency Factor of Fly Ash Regarding Compressive Strength of Concrete. In: Reddy, J., Wang, C., Luong, V., Le, A. (eds) ICSCEA 2019. Lecture Notes in Civil Engineering, vol 80. Springer, Singapore. https://doi.org/10.1007/978-981-15-5144-4_42
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DOI: https://doi.org/10.1007/978-981-15-5144-4_42
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