However, when the curing time reached 28 days, the strength of the samples showed a decreasing trend, from 2.36 MPa (the lowest C/S ratio) to 3.97 MPa (the highest C/S ratio).
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Effects of Na<sub>2</sub>CO<sub>3</sub>/Na<sub>2</sub>SiO<sub>3</sub> Ratio and Curing Temperature on the Structure Formation of Alkali-Activated High-Carbon Biomass Fly Ash Pastes.
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