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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/26676

Title: Radon immobilization potential of alkali-activated materials containingground granulated blast furnace slag and phosphogypsum
Authors: Gijbels, Katrijn
Ion Iacobescu, Remus
Pontikes, Yiannis
Vandevenne, Niels
Schreurs, Sonja
Schroeyers, Wouter
Issue Date: 2018
Abstract: This study evaluates the immobilization potential of 222Rn in alkali-activated materials (AAMs) based on ground granulated blast furnace slag (GGBFS). As radon source, 10 wt% phosphogypsum (PG) was added to evaluate PG reuse via AAMs. Matrix properties were modified by varying alkali activator’s SiO2/Na2O and H2O/Na2O ratios. During hardening of AAMs, radon release occurs in three stages resulting, after 30 h, to 0.26 Bq/(kg∗h). By varying the alkali-activator, massic exhalation for hardened samples decreased down to 0.01 Bq/(kg∗h). Radon release was successfully reduced mainly by physical encapsulation, with best results being achieved by adjusting the alkali-activator to SiO2/Na2O = 0.75 and H2O/Na2O = 20.
URI: http://hdl.handle.net/1942/26676
DOI: 10.1016/j.conbuildmat.2018.06.162
ISSN: 0950-0618
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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