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Phosphorus and calcium compounds are present in the chemical composition of byproducts from coal and biomass combustion. They may have an influence on the microstructure and the mechanical properties through the specific bonds in polymeric aluminosilicates - geopolymers. Results proved that the 5% of CaO added to high-silica fly ash geopolymer increases material density and mechanical properties. Phosphate compounds available in the biomass fly ash have a negative effect on geopolymer mortars by increasing porosity and decreasing their compressive strength.

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The Effects of Calcium and Phosphate Compounds on the Mechanical and Microstructural Properties of Fly Ash Geopolymer Mortars

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年

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  • Piotr Prochoń,
  • Tomasz Piotrowski,
  • Luc Courard,
  • Zengfeng Zhao

摘要

Phosphorus and calcium compounds are present in the chemical composition of byproducts from coal and biomass combustion. They may have an influence on the microstructure and the mechanical properties through the specific bonds in polymeric aluminosilicates - geopolymers. Results proved that the 5% of CaO added to high-silica fly ash geopolymer increases material density and mechanical properties. Phosphate compounds available in the biomass fly ash have a negative effect on geopolymer mortars by increasing porosity and decreasing their compressive strength.