GraFar - Repository of the Faculty of Civil Engineering
Faculty of Civil Engineering of the University of Belgrade
    • English
    • Српски
    • Српски (Serbia)
  • English 
    • English
    • Serbian (Cyrilic)
    • Serbian (Latin)
  • Login
View Item 
  •   GraFar
  • GraFar
  • Radovi istraživača / Researcher's publications
  • View Item
  •   GraFar
  • GraFar
  • Radovi istraživača / Researcher's publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Radiological and material characterization of high volume fly ash concrete

Thumbnail
2017
1-s2.0-S0265931X16302223-main.pdf (1.072Mb)
Authors
Ignjatović, Ivan
Sas, Z.
Dragaš, Jelena
Somlai, J.
Kovacs, T.
Article (Published version)
Metadata
Show full item record
Abstract
The main goal of research presented in this paper was the material and radiological characterization of high volume fly ash concrete (HVFAC) in terms of determination of natural radionuclide content and radon emanation and exhalation coefficients. All concrete samples were made with a fly ash content between 50% and 70% of the total amount of cementitious materials from one coal burning power plant in Serbia. Physical (fresh and hardened concrete density) and mechanical properties (compressive strength, splitting tensile strength and modulus of elasticity) of concrete were tested. The radionuclide content (Ra-226, Th-232 and (40)k) and radon massic exhalation of HVFAC samples were determined using gamma spectrometry. Determination of massic exhalation rates of HVFAC and its components using radon accumulation chamber techniques combined with a radon monitor was performed. The results show a beneficial effect of pozzolanic activity since the increase in fly ash content resulted in an in...crease in compressive strength of HVFAC by approximately 20% for the same mass of cement used in the mixtures. On the basis of the obtained radionuclide content of concrete components the I -indices of different HVFAC samples were calculated and compared with measured values (0.27-0.32), which were significantly below the recommended 1.0 index value. The prediction was relatively close to the measured values as the ratio between the calculated and measured I-index ranged between 0.89 and 1.14. Collected results of mechanical and radiological properties and performed calculations clearly prove that all 10 designed concretes with a certain type of fly ash are suitable for structural and non-structural applications both from a material and radiological point of view.

Keywords:
Fly ash / Concrete / NORM / I-index / Radon exhalation
Source:
Journal of Environmental Radioactivity, 2017, 168, 38-45
Publisher:
  • Elsevier Ltd
Projects:
  • European Union
  • European Social Fund TAMOP 4.2.4. A/2-11-1-2012-0001
  • 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)
  • COST Action TU1301
  • State of Hungary

DOI: 10.1016/j.jenvrad.2016.06.021

ISSN: 0265-931X

PubMed: 27400654

WoS: 000394630600007

Scopus: 2-s2.0-85002561635
[ Google Scholar ]
19
15
URI
http://grafar.grf.bg.ac.rs/handle/123456789/848
Collections
  • Radovi istraživača / Researcher's publications
  • Катедра за материјале и конструкције
Institution
GraFar

DSpace software copyright © 2002-2015  DuraSpace
About GraFar - Repository of the Faculty of Civil Engineering | Send Feedback

OpenAIRERCUB
 

 

All of DSpaceInstitutionsAuthorsTitlesSubjectsThis institutionAuthorsTitlesSubjects

Statistics

View Usage Statistics

DSpace software copyright © 2002-2015  DuraSpace
About GraFar - Repository of the Faculty of Civil Engineering | Send Feedback

OpenAIRERCUB