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Geopolymers are innovative, ecological, low-cost, inorganic polymers derived from the naturally occurring geological materials which combine low temperature, polymer-like processing with high temperature stability and fire resistibility without toxic smoke generation. To increase efficiency of geopolymer composite materials in aerospace where the fire resistibility is critical, their incorporation into sandwich panels must be applied and evaluated. This paper presents drum peel strength (ASTM D1781 standard) of bo...