Development of geopolymer composites reinforced with fiber felts using an industrial approach

Conference Dates

May 27-June 1, 2018


Geopolymers are synthetic inorganic alumino-silicate materials generally formed by reaction of an aluminosilicate with an alkali (Na,K) silicate solution. The reaction occurs at room temperature, so geopolymer can be considered as a type of bi-component inorganic resin.

Considering their inorganic structure, geopolymer composites have better thermal properties than organic resins, which typically decompose by oxidation starting from ~400°C.

In collaboration with Trucker Subforniture s.r.l., geopolymer based composites reinforced with different kinds of felt, have been developed as alternative to GFRP, for applications where a high thermal resistance is required. Glass and basalt fibers were considered as reinforcement; using felts based on recycled fibers it is possible to keep the cost lower than that of virgin fibers for basalt fibers. Geopolymer composites were developed using an industrial technology. In order to have a good infiltration of the felts, the composition of a potassium based geopolymer resin was optimized in terms of water and alkalinity to tune the rheology and the reactivity in function of the temperature.

Density, mechanical properties and thermal stability of the different composites were tested.

References: 1. A. Natali, S. Manzi, M.C. Bignozzi, Novel fiber-reinforced composite materials based on sustainable geopolymer matrix, Procedia Engineering, 21, pp 1124-1131, 2011

2. D. Ribero and W.M. Kriven, “Properties of Geopolymer Composites Reinforced with Basalt Chopped Strand Mat or Woven Fabric”. J. Am. Ceram. Soc., 99, pp.1192–1199, 2016

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