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This is a Experimental Study study.

October 16, 2025MaterialsOpen Access

The Effect of Different Particle Sizes of Fly Ash on the Properties of Mortar

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Mortar with 10–20 μm fly ash achieved 58.25 MPa compressive strength and 10.29 MPa flexural strength.
Maximum hydration heat release rate of fly ash in the 10–20 μm range was 1.84 mW/g at 70 h.
Total porosity of mortar was lowest at 12.88% with 27.1 nm average pore size when using 10–20 μm fly ash.
Smaller fly ash particle sizes enhance the volcanic ash reaction, improving mortar hydration.

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Experimental analysis investigates the effects of fly ash particle size on mortar compressive strength and hydration behavior.

Wu et al. (2025) studied this question.

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