About: Micromechanical multiscale model for alkali activation of fly ash and metakaolin

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The process of alkali activation of fly ash and metakaolin is examined in the view of micromechanics. Elasticity is predicted via semi-analytical homogenization methods, using a combination of intrinsic elastic properties obtained from nanoindentation, evolving volume fractions and percolation theory. A new quantitative model for volume fraction is formulated, distinguishing the evolution of unreacted aluminosilicate material, solid gel particles of N-A-S-H gel, and open porosity, which is partially filled with the activator. The stiffening of N-A-S-H gel is modeled by increasing the fraction of solid gel particles. Their packing density and intrinsic elasticity differ in N-A-S-H gels synthesized from both activated materials. The low ability of N-A-S-H gel to bind water chemically explains the high porosity of Ca-deficient activated materials. The process of alkali activation of fly ash and metakaolin is examined in the view of micromechanics. Elasticity is predicted via semi-analytical homogenization methods, using a combination of intrinsic elastic properties obtained from nanoindentation, evolving volume fractions and percolation theory. A new quantitative model for volume fraction is formulated, distinguishing the evolution of unreacted aluminosilicate material, solid gel particles of N-A-S-H gel, and open porosity, which is partially filled with the activator. The stiffening of N-A-S-H gel is modeled by increasing the fraction of solid gel particles. Their packing density and intrinsic elasticity differ in N-A-S-H gels synthesized from both activated materials. The low ability of N-A-S-H gel to bind water chemically explains the high porosity of Ca-deficient activated materials. (en)
Title	Micromechanical multiscale model for alkali activation of fly ash and metakaolin Micromechanical multiscale model for alkali activation of fly ash and metakaolin (en)
skos:prefLabel	Micromechanical multiscale model for alkali activation of fly ash and metakaolin Micromechanical multiscale model for alkali activation of fly ash and metakaolin (en)
skos:notation	RIV/68407700:21110/11:00180836!RIV12-GA0-21110___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA103/09/1748), P(GAP104/10/2344)
http://linked.open...iv/cisloPeriodika	20
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Hlaváček, Petr Kopecký, Lubomír Němeček, Jiří Šulc, Rostislav Šmilauer, Vít
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta stavební
http://linked.open...dnocenehoVysledku	212319
http://linked.open...ai/riv/idVysledku	RIV/68407700:21110/11:00180836
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	alkali-activation; fly ash; metakaolin; micromechanics; nanoindentation; N-A-S-H gel (en)
http://linked.open.../riv/klicoveSlovo	fly ash micromechanics nanoindentation metakaolin N-A-S-H gel alkali-activation
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[6CF41C606BC6]
http://linked.open...i/riv/nazevZdroje	Journal of Materials Science
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Integration of experimental nanoindentation with numerical tools for upscaling of nanomechanical properties of heteregeneous materials Surface Modification of PET Fibers to Improve Mechanical Properties of PET Reinforcement at Cement Composites
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	46
http://linked.open...iv/tvurceVysledku	Hlaváček, Petr Kopecký, Lubomír Němeček, Jiří Škvára, F. Šulc, Rostislav Šmilauer, Vít
http://linked.open...ain/vavai/riv/wos	000293137500009
issn	0022-2461
number of pages	11 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10853-011-5601-x
http://localhost/t...ganizacniJednotka	21110

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