"Ceramics-Silik\u00E1ty" . . "INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER" . "RIV/00216305:26110/10:PU89023" . "263601" . "Geopolymer material based on coal fly ash from the high temperature combustion activated with alkali silicate is a very cheap and suitable material for temporary and non-load-bearing structures. For the purposes of emergency application, such as closing barriers, it is necessary to have dry mixtures ready for mixing with water. However, the utilization of dried sodium silicate activator instead of an aqueous solution considerably delays its setting. The application of C12A7 accelerates the setting of alkali activated fly ash, but it also influences its mechanical properties. Early-age strengths are increased, the long term strengths are, however, deteriorated in comparison with the pure material without C12A7. Microstructural changes are described by means of mercury intrusion porosimetry, SEM, XRD and FTIR analysis."@en . "6"^^ . . "Geopolymer material based on coal fly ash from the high temperature combustion activated with alkali silicate is a very cheap and suitable material for temporary and non-load-bearing structures. For the purposes of emergency application, such as closing barriers, it is necessary to have dry mixtures ready for mixing with water. However, the utilization of dried sodium silicate activator instead of an aqueous solution considerably delays its setting. The application of C12A7 accelerates the setting of alkali activated fly ash, but it also influences its mechanical properties. Early-age strengths are increased, the long term strengths are, however, deteriorated in comparison with the pure material without C12A7. Microstructural changes are described by means of mercury intrusion porosimetry, SEM, XRD and FTIR analysis." . . . "0862-5468" . . . "1"^^ . "26110" . "fly ash, alkali activation, setting accelerator, mayenite"@en . . "1"^^ . "54" . "INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER"@en . "CZ - \u010Cesk\u00E1 republika" . . . . "RIV/00216305:26110/10:PU89023!RIV11-GA0-26110___" . . . . "INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER" . . "4" . . "P(GP103/08/P270), Z(MSM0021630511)" . . . "[9F592908311C]" . . "INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER"@en . "Rovnan\u00EDk, Pavel" .