Aluminosilicate foam materials for manufacturing sandwich panels with a core based on them

Geopolymers and foam materials based on them are offering a significant potential for using in many industries due to their fire resistance, light weight, sound and heat insulating properties. However, formulations that provide stable foaming, as well as methods for producing the geopolymer materials with densities below 300 kg/m. Are currently missing. The paper proposes composition and simple technology for producing the alkali-activated aluminosilicate foam and sandwich panels with a core based on it. The low-density foams (197–234 kg/m?) with a uniform, fine-celled structure and high mechanical properties are obtained. A two-stage foam production process is developed based on the thermogravimetric measurements conducted in the non-isothermal mode at the varying heating rates and on simulation of the water removal process. Based on the rheological study results, the mixing, pre-foaming, and foam material production modes and modes for production of the sandwich panels with a core based on them are optimized. The paper improves the gum acacia content, and demonstrates its dual functioning as a surfactant and stabilizer in the foam formation. It considers the combined foaming by water and azodicarbonamide taking into account the temperature and concentration ranges of their use in the geopolymer foam production process.
EDN: UGYYGX, https://elibrary/ugyygx

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