What Is A Geopolymer

What is a geopolymer? Introduction in Science The remarkable achievements made through geosynthesis and geopolymerisation include mineral polymers (geopolymers), flexible ceramics which transform like plastics at low temperatures, ceramic composite made at room temperature or thermoset in a simple autoclave, concrete which after 4 hours has higher strength and durability than the best currently-used concrete. Resulting from this are industrial applications which, [...]

About geopolymerization in Science Geopolymerization is a geosynthesis (a reaction that chemically integrates minerals) that involves naturally occurring silico-aluminates. The silicon(Si) and aluminum (Al) atoms react to form molecules that are chemically and structurally comparable to those binding natural rock that allows for products to exhibit the most ideal properties of rock-forming elements, i.e., hardness, chemical stability and longevity [...]

Scientific means of investigation in Science X-rays diffraction spectra of hardened geopolymeric materials (resins and cements) do not provide accurate information (amorphous structure). High-resolution MAS-NMR (Nuclear Magnetic Resonance) spectroscopy of 29Si and 27Al is a very powerful tool that provides useful structural data. For more information, download paper #12 J. Thermal Analysis , #3 NASTS award or #8 Alkaline Cements and Concretes [...]

Chemical Structure and Applications in Science The atomic ratio Si:Al in the poly(sialate) structure determines the properties and application fields. A low ratio Si:Al (1,2,3) initiates a 3D-Network that is very rigid. A high ratio Si:Al, higher than 15, provides polymeric character to the geopolymeric material.

Technical Data Sheet in Science

Technical Data Sheet for Geopolymeric cement type (Potassium, Calcium) – Poly(sialatesiloxo) / (K,Ca) – (Si-O-Al-O-Si-O-), Si:Al=2:1 Further details in: Proceedings of Geoplymer 2005 , GEOCISTEM , GLOBAL WARMING , #3 NASTS award Tested on standard sand mortar prisms setting: 10 hours at -20°C to 7-60 minutes at +20°C. shrinkage during setting: 90 MPa at 28 days (for [...]

Cements, Concretes, Toxic Wastes, Global Warming in Science Geopolymeric cements are ideal for environmental applications, such as the permanent encapsulation of radioactive and other hazardous wastes, toxic metals, as well as sealants, capping, barriers, and other structures necessary for remedying toxic waste containment sites (see our Research Project GEOCISTEM and the GEOPOLYTECH® process). In the Library, three papers are dealing with this topic, [...]

Portland Cement Chemistry vs. Geopolymer Chemistry in Science Left: hardening of Portland cement (P.C.) through simple hydration of Calcium Silicate into Calcium Di-Silicate hydrate and lime Ca(OH)2. Right: hardening (setting) of Geopolymer resin (GP) through poly-condensation of Potassium Oligo-(sialate-siloxo) into Potassium Poly(sialate-siloxo) cross linked network.

Binders and Composites in Science Geopolymeric binders, used either with rock aggregates to produce rock-concretes or with carbon fibers to produce non-flammable composites, have a variety of important industrial uses. The same geosynthesis that produces geopolymeric rock-cements is used industrially for making binders for advanced composite materials. Updated research are discussed in the various papers presented at the Geopolymer 2005 Congress [...]

Making heat-resistant Geopolymer Composite

in Science Procedure used in the fabrication of a ladle for aluminum casting (800°C) Step 1: Impregnation of fabric (ceramic fiber) with GEOPOLYMITE resin Step 2: first ply Step 3: first lay Step 4: impregnation of last ply Step 5: Demolding after cure at 80°C Step 6: Operating ladle at 800°C