Abstract: A method for manufacturing insulating and/or fire-resistant material, wherein the potato steam peels are subjected to a treatment for recovering a cork fraction, at least a non-calorific part, from those peels, while the insulating and/or fire resistant material is manufactured at least from the recovered cork fraction and a binding agent. The invention further provides insulating and/or fire-resistant material containing at least a cork fraction recovered from potato steam peels. Further, the invention provides a construction element, provided with such insulating and/or fire-resistant material.

Abstract: Geopolymer-modified gypsum construction materials. Compositions derived from combining geopolymer adhesives with conventional gypsum wallboard slurry formulations produce an interpenetrating network (IPN) which cures by loss of process water to a refractory solid having improved fire and water resistance. Geopolymer adhesive starting compositions includes soluble and insoluble silicates, buffers and salts, and a chemical setting agent in aqueous suspension.