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master's thesis
Oporaba pepela biomase u cementnim materijalima
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2015. urn:nbn:hr:149:734892
Žagar, Danijel
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Žagar, D. (2015). Oporaba pepela biomase u cementnim materijalima (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:734892

Žagar, Danijel. "Oporaba pepela biomase u cementnim materijalima." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2015. https://urn.nsk.hr/urn:nbn:hr:149:734892

Žagar, Danijel. "Oporaba pepela biomase u cementnim materijalima." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2015. https://urn.nsk.hr/urn:nbn:hr:149:734892

Žagar, D. (2015). 'Oporaba pepela biomase u cementnim materijalima', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:734892

Žagar D. Oporaba pepela biomase u cementnim materijalima [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2015 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:734892

D. Žagar, "Oporaba pepela biomase u cementnim materijalima", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2015. Available at: https://urn.nsk.hr/urn:nbn:hr:149:734892

Metadata
TitleOporaba pepela biomase u cementnim materijalima
Title (english)Reuse of biomass ash in cement based materials
AuthorDanijel Žagar
MentorNevenka Vrbos (mentor)
Committee memberNevenka Vrbos (predsjednik povjerenstva)
Committee memberJuraj Šipušić (član povjerenstva)
Committee memberEmi Govorčin Bajsić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2015-07-06, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Basic Technical Sciences
Materials
Abstract
U ovome radu istražena je zamjena cementa i pijeska s otpadnim letećim pepelom od spaljivanja drvnog otpada u Hrvatskoj. Ovaj pepeo ima relativno veliki udio slobodnog CaO i MgO, ali i povoljne minerale Ca2SiO4, Ca2AlFeO5 i Ca2Al2SiO7, karakteristične za cement, čime je opravdana njegova primjena u svrhu zamjene dijela cementa. Već i sam leteći pepeo, te u smjesi sa cementom, pokazuje znatnu hidratnu i pucolansku aktivnost. Glavni utjecaj na kemiju hidratacije cementa je u nastanku C4AHx. Dodatak pepela do 20% smanjuje: gustoću slagaline čestica, kapilarno upijanje, tlačnu i savojnu čvrstoću (10-15% nakon 28. dana), ali povećava ekspanziju (unutar norme) i poroznost. Optimalni sastav novih cementnih materijala je 15-20%-tni dodatak letećeg pepela biomase (po masi cementa) za zamjenu cementa i pijeska pri čemu se čestice koje su veće od 80 μm uzimaju za zamjenu pijeska, a manje čestice za zamjenu cementa.
Abstract (english)
This work investigates replacement of cement and sand with fly ash waste generated from combustion of wood waste in Croatia. The ash has a relatively high fraction of CaO and MgO, but also Ca2SiO4, Ca2AlFeO5, Ca2Al2SiO7 minerals characteristic to cement thus justifying it's application as cement replacement. Even the hydration of the ash alone, as well as blended with cement, exhibits large hydraulic and pucolanic activity. The main effect on cement hydration chemistry is in formation of C4AHx product. Addition of up to 20% (per cement mass) decreases: particle packing density, capillary absorption, compressive and flexural strength (10-15% at 28 days), and increases volume expansion (within norm limit), and porosity. Optimal mixture design of the novel cementitious materials would be a 15-20% of biomass fly ash loading (per cement mass) for both cement and sand replacement, in which the particles larger than 80 μm are considered as replacement of sand, while smaller of cement.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:734892
Study programmeTitle: Materials Science and Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2016-12-07 12:09:05