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This research aims to evaluate how fly ash and silica fume affect the properties of pervious concrete.

Experimental and statistical optimisation of pervious concrete modified with fly ash and silica fume

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This research aims to evaluate how fly ash and silica fume affect the properties of pervious concrete.
Evaluated various mix designs with different water-to-cement ratios and SCM contents.
Applied response surface methodology for optimisation.
Conducted mechanical and microstructural analyses.
Measured workability, porosity, permeability, compressive strength, and durability.
Increases in water-to-cement ratio improved workability, but silica fume reduced it due to its fine texture.
A mix of 30% fly ash and 10% silica fume improved workability by 110%.
Porosity and permeability were linearly related to SCM content and w/c ratio, peaking at 5% silica fume.
Compressive strength improved with silica fume but decreased with fly ash alone.
Microstructural analysis showed both additives enhanced matrix densification and durability.

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Experimental investigation modulates properties of pervious concrete, indicating a blend of materials enhances performance.

Bhat et al. (2026) studied this question.

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