Influence of fibers on the multiscale properties of fly ash and slag based geopolymer foam concrete

To address the need for low-carbon, lightweight, high-strength, and thermally insulating wall materials in prefabricated construction, this study systematically investigated the effects of polyvinyl alcohol (PVA) and glass fibers on the properties of chemically foamed fly ash-slag geopolymer foam concrete (GFC) at different temperatures. Multi-scale characterization techniques, including XRD, SEM, and digital image correlation (DIC), were employed to analyze compositional, microstructural, and crack‑evolution behaviors.The results show that while fiber addition reduces fluidity and raises dry density, it markedly enhances both mechanical and thermal performance. At a fiber length of 9 mm and content of 0.3 %,…

• DO
  Department of Education of Hebei Province

  Award: QN2025425