What question did this study set out to answer?

The aim is to investigate the impact of coal gangue powder on the properties of geopolymer pervious concrete.

March 15, 2026Low-carbon Materials and Green ConstructionOpen Access

Upcycling coal gangue in alkali-activated pervious concrete: a sustainable pathway to sponge city infrastructure

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Authors

TZTao ZhuChinese Academy of Sciences YMYan Ma CXChao XueGuangxi Medical University

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Implication

This research demonstrates reduced mechanical strength and altered pore structure in geopolymer concrete with coal gangue, indicating durability challenges.

Key Points

The aim is to investigate the impact of coal gangue powder on the properties of geopolymer pervious concrete.
Evaluated coal gangue powder as a partial replacement for ground granulated blast-furnace slag
Analyzed multiscale properties including mechanical strength and permeability
Conducted tests on freeze-thaw cycles and pore structure
Mechanical strength decreased with higher coal gangue content
At 40% replacement, compressive strength fell below required C20 class
Enhanced total porosity but reduced permeability
Frost resistance showed over 20% strength loss after multiple freeze-thaw cycles
Optimal performance at 30% coal gangue incorporation

Cite This Study

Zhu et al. (2026) studied this question.

synapsesocial.com/papers/69b5ff4f83145bc643d1b9f2 https://doi.org/10.1007/s44242-026-00099-9

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Implication

This research demonstrates reduced mechanical strength and altered pore structure in geopolymer concrete with coal gangue, indicating durability challenges.

Upcycling coal gangue in alkali-activated pervious concrete: a sustainable pathway to sponge city infrastructure

Discussion

Member takes

Implication

Key Points

Cite This Study

Upcycling coal gangue in alkali-activated pervious concrete: a sustainable pathway to sponge city infrastructure

Discussion

Member takes

Implication

Key Points

Cite This Study

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