Alkali-activated concrete with Serbian fly ash and its radiological impact

Cristina Nuccetelli, Rosabianca Trevisi, Ivan Ignjatović, Jelena Dragaš

Research output: Contribution to journalArticle

Abstract

The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC) depending on their radiological and mechanical properties. Five AAC mixtures with different types of coal burning fly ash and one type of blast furnace slag were designed. Measurements of the activity concentrations of 40K, 226Ra and 232Th were done both on concrete constituents (fly ash, blast furnace slag and aggregate) and on the five solid AAC samples. Experimental results were compared by using the activity concentration assessment tool for building materials - the activity concentration index I, as introduced by the EU Basic Safety Standards (CE, 2014). All five designed alkali-activated concretes comply with EU BSS screening requirements for indoor building materials. Finally, index I values were compared with the results of the application of a more accurate index - I(ρd), which accounts for thickness and density of building materials (Nuccetelli et al., 2015a). Considering the actual density and thickness of each concrete sample index - I(ρd) values are lower than index I values. As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.

Original languageEnglish
Pages (from-to)30-37
Number of pages8
JournalJournal of Environmental Radioactivity
Volume168
DOIs
Publication statusPublished - Mar 1 2017

Keywords

  • Activity concentration
  • Activity concentration index I
  • Alkali activated concrete
  • Blast furnace slag
  • Dose model
  • Fly ash

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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