SHEN Pengfei, QIN Zipeng, TIAN Yan, LI Gang, LIU Canhua
(College of Water Conservancy and Architecture Engineering, Shihezi University, Shihezi 832000, Xinjiang, China)

Abstract: Fly ash foam glass was prepared using fly ash and foam glass powder as the main raw materials, and TiO₂, Fe₂O₃, Na₃PO₄, K₃PO₄, and H₃BO₃ respectively as th foam stabilizer. The mechanical properties, apparent density, porosity, pore size distribution, average pore diameter and coefficient of thermal conductivity of the fly ash foam glass were determined. The effects of different foam stabilizing agent types and dosages on physical properties of fly ash foam glass were studied. Results showed that when Na₃PO₄ was used as a foam stabilizing agent, the minimum apparent density of fly ash foam glass was 0.212 g/cm³, the minimum thermal conductivity was up to 0.0499 W/(m·K). The aperture sizes were well and uniformly distributed. So Na₃PO₄ is a more suitable stabilizing agent for the preparation of the fly ash foam glass.

Key words: foam stability; fly ash foam glass; physical properties; pore size distribution