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Alkali activated fly ash geopolymers as a new binder in concrete

Geopolimeri na bazi alkalno aktiviranog elektrofilterskog pepela kao novo vezivo u betonu

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2013
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Authors
Dragaš, Jelena
Marinković, Snežana
Miličić, Ljiljana
Marković, Smilja
Tošić, Nikola
Ignjatović, Ivan
Article (Published version)
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Abstract
As the concern for the environment and need for sustainable construction practice continues to grow, research in the field of new materials made with waste materials which have a lower impact on the environment is gaining wide interest. This paper analyzes the characteristics of fly ash from power plant 'Nikola Tesla B', and its applications in alkali activated fly ash geopolymers as a new binder in concrete. Testing of the particle size distribution and chemical composition of fly ash has been done, as well as the testing of workability and compressive strength of geopolymer pastes under different ratios of water glass and sodium hydroxide. The results show that fly ash from power plant 'Nikola Tesla B' can be used as a binder in alkali activated fly ash geopolymers made with water glass and sodium hydroxide as alkali activators cured on 80°C a certain period of time.
U skladu sa rastućom brigom za zaštitu životne sredine i potrebom razvoja održivog građevinarstva, javlja se i veće interesovanje za istraživanja u oblasti novih materijala, koji će koristiti otpadne sirovine i imati manji uticaj na životnu sredinu. U ovom radu analizirane su karakteristike elektrofilterskog pepela iz termoelektrane 'Nikola Tesla B'u Obrenovcu i mogućnost njegove primene u geopolimerima na bazi alkalno aktiviranog elektrofilterskog pepela, kao novog veziva za beton. Vršena su eksperimentalna ispitivanja granulometrijskog i hemijskog sastava pepela, kao i ugradljivosti i čvrstoće pri pritisku uzoraka spravljenih od geopolimer pasti sa različitim odnosom vodenog stakla i natrijum-hidroksida kao alkalnih aktivatora. Rezultati istraživanja pokazuju da se pepeo iz termoelektrane 'Nikola Tesla B' može upotrebiti kao vezivo u geopolimerima sa vodenim staklom i natrijum-hidroksidom, kao alkalnim aktivatorom uz negu zagrevanjem na 80°C u određenom vremenskom periodu.
Keywords:
fly ash / alkali activation / geopolymers / paste / compressive strength / elektrofilterski pepeo / alkalna aktivacija / geopolimeri / paste / čvrstoća pri pritisku
Source:
Izgradnja, 2013, 67, 9-10, 359-366
Publisher:
  • Udruženje inženjera građevinarstva, geotehnike, arhitekture i urbanista "Izgradnja", Beograd
Projects:
  • Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-36017)

ISSN: 0350-5421

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URI
http://grafar.grf.bg.ac.rs/handle/123456789/498
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  • Radovi istraživača / Researcher's publications
  • Катедра за материјале и конструкције
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