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A platform for research: civil engineering, architecture and urbanism
Alkali-activated fly ash concrete : concrete without cement ; Beton od alkalijski aktiviranog elektrofiltarskog pepela : beton bez cementa
In this work, alkali-activated fly ash was used as a binder instead of Portland cement at the preparation of concrete. Sodium hydroxide and water glass were used as alkali activators. Fractions of natural aggregate of 0-4 mm, 4-8 mm and 8-16 mm were replaced by air-cooled granulated steel slag fraction of 4-8 mm and 8- 16 mm and the fraction of river sand was replaced with silica fume. The obtained samples were cured at 2 different temperatures. The first was cured at room temperature and the other was steam-cured for 8 hours and left at room temperature until the tested date. The compressive strength test was investigated by using cube samples 150 ×150 ×150 mm after 3 and 28 days. The results of the present work have shown that low-calcium fly ash-based geopolymer concrete can substitute the use of Portland cement in concrete. ; U ovom radu pri pripremi betona kao vezivo umjesto portland cementa korišten je alkalijski aktiviran elektrofiltarski pepeo. Kao alkalijski aktivatori korišteni su vodeno staklo i natrijev hidroksid. Frakcije prirodnog agregata od 0-4 mm, 4-8 mm i 8-16 mm zamijenjene su frakcijama zrakom hlađene granulirane šljake od 4-8 mm i 8-16 mm, a frakcija pijeska zamijenjena je s amorfnom SiO2 prašinom. Dobiveni uzorci sušeni su na dvije različite temperature. Prvi su sušeni na sobnoj temperaturi a drugi su zaparivani 8 sati i zatim sušeni na sobnoj temperaturi do ispitivanja. Tlačna čvrstoća dobivenih uzoraka ispitana je na kockama 150 ×150 ×150 mm nakon 3 i 28 dana. Dobiveni rezultati su pokazali da geopolimerni beton dobiven alkalijskom aktivacijom elektrofiltarskog pepela može zamijeniti portland cement u betonu.
Alkali-activated fly ash concrete : concrete without cement ; Beton od alkalijski aktiviranog elektrofiltarskog pepela : beton bez cementa
In this work, alkali-activated fly ash was used as a binder instead of Portland cement at the preparation of concrete. Sodium hydroxide and water glass were used as alkali activators. Fractions of natural aggregate of 0-4 mm, 4-8 mm and 8-16 mm were replaced by air-cooled granulated steel slag fraction of 4-8 mm and 8- 16 mm and the fraction of river sand was replaced with silica fume. The obtained samples were cured at 2 different temperatures. The first was cured at room temperature and the other was steam-cured for 8 hours and left at room temperature until the tested date. The compressive strength test was investigated by using cube samples 150 ×150 ×150 mm after 3 and 28 days. The results of the present work have shown that low-calcium fly ash-based geopolymer concrete can substitute the use of Portland cement in concrete. ; U ovom radu pri pripremi betona kao vezivo umjesto portland cementa korišten je alkalijski aktiviran elektrofiltarski pepeo. Kao alkalijski aktivatori korišteni su vodeno staklo i natrijev hidroksid. Frakcije prirodnog agregata od 0-4 mm, 4-8 mm i 8-16 mm zamijenjene su frakcijama zrakom hlađene granulirane šljake od 4-8 mm i 8-16 mm, a frakcija pijeska zamijenjena je s amorfnom SiO2 prašinom. Dobiveni uzorci sušeni su na dvije različite temperature. Prvi su sušeni na sobnoj temperaturi a drugi su zaparivani 8 sati i zatim sušeni na sobnoj temperaturi do ispitivanja. Tlačna čvrstoća dobivenih uzoraka ispitana je na kockama 150 ×150 ×150 mm nakon 3 i 28 dana. Dobiveni rezultati su pokazali da geopolimerni beton dobiven alkalijskom aktivacijom elektrofiltarskog pepela može zamijeniti portland cement u betonu.
Alkali-activated fly ash concrete : concrete without cement ; Beton od alkalijski aktiviranog elektrofiltarskog pepela : beton bez cementa
Mikoč, Miroslav (author) / Bjelobrk, Ivan (author) / Korajac, Josip (author)
2011-03-01
Tehnički vjesnik ; Volume 18 ; Issue 1 ; ISSN 1330-3651 (Print) ; ISSN 1848-6339 (Online) ; https://hrcak.srce.hr/65933
Article (Journal)
Electronic Resource
English
DDC:
624
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