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rdf:type
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Description
| - Inorganic foams offer several unique properties such as low thermal conductivity, fire resis- tance, or UV stability. Inorganic foam specimens were synthesized from fly ash and aluminium powder through an alkali-activation process. Depending on mix proportions, bulk densities ranged between 400 and 800 kg/m 3 . Thermal treatment at 80 ° C for 12 hours accelerated curing process. Compressive strength was found in the range 4.5-9.0 MPa, flexural strength 0.6-1.7 MPa, Young's modulus 0.6-1.1 GPa, thermal conductivity 0.14-0.16 W/m/K and thermal capacity around 1100 J/kg/K. Exposing the foams to temperature 800 ° C led to a small decrease of compressive strength while exposure to 1100 ° C sintered the foam to higher strength of 13 MPa. Volumetric shrinkage 20% occurred at 1100 ° C with- out further disintegration. Residual compressive strength was determined after exposure to NaCl, HCl, Na 2 SO 4 , MgSO 4 , H 2 SO 4 . The highest reduction to 20% occured in both acids with pH=2 after one year of exposition. Digitized microstructures entered finite element analysis to validate a stress-strain diagram.
- Inorganic foams offer several unique properties such as low thermal conductivity, fire resis- tance, or UV stability. Inorganic foam specimens were synthesized from fly ash and aluminium powder through an alkali-activation process. Depending on mix proportions, bulk densities ranged between 400 and 800 kg/m 3 . Thermal treatment at 80 ° C for 12 hours accelerated curing process. Compressive strength was found in the range 4.5-9.0 MPa, flexural strength 0.6-1.7 MPa, Young's modulus 0.6-1.1 GPa, thermal conductivity 0.14-0.16 W/m/K and thermal capacity around 1100 J/kg/K. Exposing the foams to temperature 800 ° C led to a small decrease of compressive strength while exposure to 1100 ° C sintered the foam to higher strength of 13 MPa. Volumetric shrinkage 20% occurred at 1100 ° C with- out further disintegration. Residual compressive strength was determined after exposure to NaCl, HCl, Na 2 SO 4 , MgSO 4 , H 2 SO 4 . The highest reduction to 20% occured in both acids with pH=2 after one year of exposition. Digitized microstructures entered finite element analysis to validate a stress-strain diagram. (en)
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Title
| - Alkali-activated fly ash foams – synthesis, chemo-physical properties and microstructure modeling
- Alkali-activated fly ash foams – synthesis, chemo-physical properties and microstructure modeling (en)
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skos:prefLabel
| - Alkali-activated fly ash foams – synthesis, chemo-physical properties and microstructure modeling
- Alkali-activated fly ash foams – synthesis, chemo-physical properties and microstructure modeling (en)
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skos:notation
| - RIV/68407700:21110/14:00221387!RIV15-GA0-21110___
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
| - P(GA13-22230S), P(GAP104/12/0102)
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21110/14:00221387
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - alkali-activation; fly ash; foam; chemical durability; mechanical properties (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
| - CH - Švýcarská konfederace
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
| - Advances in Science and Technology
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...vavai/riv/projekt
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Hlaváček, Petr
- Škvára, F.
- Šmilauer, Vít
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issn
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number of pages
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http://localhost/t...ganizacniJednotka
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