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Statements

Subject Item
n2:RIV%2F68407700%3A21110%2F10%3A00171723%21RIV11-GA0-21110___
rdf:type
n17:Vysledek skos:Concept
dcterms:description
Research of alkali-activated materials has been a traditional domain of chemists. This paper exploits contribution of micromechanics to the subject. A new model for volumetric evolution of chemical phases is formulated. The first homogenization level identifies elasticity on the scale of N-A-S-H gel. Nanoindentation sensing technique yielded the intrinsic Young\'s modulus of N-A-S-H gel as ~18 GPa, which was further downscaled to the solid gel particles. Percolation theory had to be introduced to match an early-age elasticity. The second homogenization level takes into account an unreacted fly ash. Homogenization models match well the experimental elasticity and demonstrate stiffening of N-A-S-H gel, induced by increasing packing density of the solid gel particles. The percolation model explains a long setting time of alkali-activated materials. Research of alkali-activated materials has been a traditional domain of chemists. This paper exploits contribution of micromechanics to the subject. A new model for volumetric evolution of chemical phases is formulated. The first homogenization level identifies elasticity on the scale of N-A-S-H gel. Nanoindentation sensing technique yielded the intrinsic Young\'s modulus of N-A-S-H gel as ~18 GPa, which was further downscaled to the solid gel particles. Percolation theory had to be introduced to match an early-age elasticity. The second homogenization level takes into account an unreacted fly ash. Homogenization models match well the experimental elasticity and demonstrate stiffening of N-A-S-H gel, induced by increasing packing density of the solid gel particles. The percolation model explains a long setting time of alkali-activated materials.
dcterms:title
Application of Micromechanics on Alkali-activated Materials Application of Micromechanics on Alkali-activated Materials
skos:prefLabel
Application of Micromechanics on Alkali-activated Materials Application of Micromechanics on Alkali-activated Materials
skos:notation
RIV/68407700:21110/10:00171723!RIV11-GA0-21110___
n3:aktivita
n20:P
n3:aktivity
P(GA103/08/1639)
n3:dodaniDat
n13:2011
n3:domaciTvurceVysledku
n9:3161471 n9:3008142 n9:2233061 n9:7575505
n3:druhVysledku
n18:D
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
247455
n3:idVysledku
RIV/68407700:21110/10:00171723
n3:jazykVysledku
n16:eng
n3:klicovaSlova
geopolymer, fly ash, alkali-activation, models
n3:klicoveSlovo
n10:geopolymer n10:models n10:fly%20ash n10:alkali-activation
n3:kontrolniKodProRIV
[84FD68DBFAAF]
n3:mistoKonaniAkce
Montecatini Terme
n3:mistoVydani
ZURICH
n3:nazevZdroje
Proceedings of the 12th International Ceramics Congress - CIMTEC 2010
n3:obor
n21:JI
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
5
n3:projekt
n7:GA103%2F08%2F1639
n3:rokUplatneniVysledku
n13:2010
n3:tvurceVysledku
Škvára, František Šmilauer, Vít Kopecký, Lubomír Němeček, Jiří Hlaváček, Petr
n3:typAkce
n14:WRD
n3:zahajeniAkce
2010-06-06+02:00
s:numberOfPages
11
n19:hasPublisher
TRANS TECH PUBLICATIONS LTD
n6:isbn
978-3-908158-61-5
n11:organizacniJednotka
21110