No abstract

The aim of this study is to determinate thermophysical properties (thermal diffusivity, thermal conductivity, specific heat and thermal expansion) of geopolymer composites reinforced with different types of woven fabrics. Many reinforcements and geopolymer matrices are now available, but our work was focused on geopolymer matrix Q13K1, which involved common of thermal silica, kaolin, and potassium water glass; and combination with fabric E-glass, basalt and carbon fibers were also investigated. The samples were prepared using a standard vacuum bagging technique. The fabrics were impregnated with the matrix by-hand, stacked together and placed in the vacuum bag. Thermophysical properties were determined in accordance with national and international standards such as ASTM E-1461, DIN 30905, DIN EN 821, DIN 53752, etc.

No abstract

No abstract

Abstract. Geopolymer matrice Composites are fabricated at room temperature or thermoset in a simple autoclave. After approximately four hours of curing, composite materials exhibit excellent properties. Finding applications of geopolymeric composites in all fields of industry are the hot topics. This paper covers: (i) mechanical properties of fibers: carbon, Saint-Gobain Cemfil/CFV alkali resistance glass (various types), ARG-NEC (Nippon electric Columbia) alkali resistance glass, Eglass for pultrusion, AR glass for pultrusion were evaluated in accordance with Japanese Industrial Standard (JIS R 7601).(ii) properties of geopolymeric matrices: geopolymeric matrices are fabricated from various types of geopolymeric resins that were made at Research Institute of Inorganic Chemistry, Inc., Czech Republic and testing for mechanical properties, and by SEM for structure characterization. (iii) fabrication procedures of geopolymer matrix composites with carbon and other fiber reinforcements. (iv) results of mechanical testing of geopolymer composites, SEM for adhesion between the matrix and reinforcement, and (v) Results and discussion.