Under the denomination geopolymers, composites based on alkali activated metakaolin are preferably introduced (%22true%22 geopolymers, without calcium component), imitating natural zeolites. Their microstructure and properties are dependent on the Si/Al/Na(K) ratio. The use of potassium hydroxide or silicate prevents the formation of efflorescence. Sodium water glass and treatment of the composites at higher temperatures increases the strengths. The zeolitic character of this geopolymeric material brings about long-term durability and enables its use for figurative castings in architecture and sculpture. (en)
Popisuje volbu vhodného poměru jednotlivých složek geopolymerní matrice
Popisuje volbu vhodného poměru jednotlivých složek geopolymerní matrice (cs)