page_title: Geopolymer
section_title: Portland cement chemistry vs geopolymer chemistry
hierarchical_section_title: Geopolymer / Geopolymer cements / Portland cement chemistry vs geopolymer chemistry
caption_attribution_description: Français&#160;: comparaison entre chimie Portland et chimie géopolymère
context_page_description: Geopolymers are inorganic, typically ceramic, materials that form long-range, covalently bonded, non-crystalline networks. Obsidian fragments are a component of some geopolymer blends. Commercially produced geopolymers may be used for fire- and heat-resistant coatings and adhesives, medicinal applications, high-temperature ceramics, new binders for fire-resistant fiber composites, toxic and radioactive waste encapsulation and new cements for concrete. The properties and uses of geopolymers are being explored in many scientific and industrial disciplines: modern inorganic chemistry, physical chemistry, colloid chemistry, mineralogy, geology, and in other types of engineering process technologies. The field of geopolymers is a part of polymer science, chemistry and technology that forms one of the major areas of materials science. Polymers are either organic material, i.e. carbon-based, or inorganic polymer, for example silicon-based. The organic polymers comprise the classes of natural polymers, synthetic organic polymers and natural biopolymers.
context_section_description: Left: hardening of Portland cement (P.C.) through hydration of calcium silicate into calcium silicate hydrate (C-S-H) and portlandite, Ca(OH)₂.
  Right: hardening (setting) of geopolymer cement (GP) through poly-condensation of potassium oligo-(sialate-siloxo) into potassium poly(sialate-siloxo) cross linked network.
caption: Portland cement chemistry compared to geopolymerization GP
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