Archives of Metallurgy and Materials

Abstract

EffEct of Solid-to-liquidS and na 2 Sio 3 -to-naoH Ratio on MEtakaolin MEMbRanE GEopolyMERSGeopolymer is synthesized by polycondensation of sio 4 and alo 4 aluminosilicate complexes, tetrahedral frames linked with shared sialate oxygen. this paper studies the effect of the solids-to-fluids (s/l) and na 2 sio 3 /naoh proportions on the preparing of metakaolin inorganic membrane geopolymer. by consolidating a mixture of metakaolin with sodium hydroxide, sodium silicate and foaming agent, the geopolymer membrane was made in required shape about 1 cm and cured at 80°c for 24 hours. after the curing process, the properties of the samples were tested on days 7. sodium silicate (na 2 sio 3 ) and sodium hydroxide (naoh) solution were utilized as an alkaline activator with a naoh fixation fixed at 10 M. the geopolymer inorganic membrane tests were set up with various s/l proportions (0.8, 1.0, 1.2 and 1.4) and na 2 sio 3 /naoh proportions (0.5, 1.0, 1.5, 2.0 and 2.5). aluminium (al) powder as a foaming agent was used to create bubbles in porous structure and provide details on the development of membrane geopolymers. this metakaolin membrane, based on the geopolymer, was synthesized by a suspension that depends on the fast cementing mechanism of high-temperature slurries. Porous geopolymeric circles provided a homogeneous composition and quantitative distribution of pores. the water absorption, density, impact toughness testing and microstructure analyses were studied. however, considering the promising results, an adjustment in the mix design of the metakaolin inorganic membrane geopolymer mixtures could increase their mechanical properties without negatively affecting the mechanical properties and porosity, making these sustainable materials a suitable alternative to traditional porous cement concrete.Keywords: Geopolymer; metakaolin membrane; porous geopolymer; solid-to-liquid (s/l) ratio and na 2 sio 3 /naoh ratio 4 GheorGhe asachi technical uniVersity of iasi, faculty of Materials science and enGineerinG, 700050, iasi, roMania