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Title: | Radon immobilization potential of alkali-activated materials containing ground granulated blast furnace slag and phosphogypsum | Authors: | GIJBELS, Katrijn Lacobescu, Remus Ion Pontikes, Yiannis VANDEVENNE, Niels SCHREURS, Sonja SCHROEYERS, Wouter |
Issue Date: | 2018 | Publisher: | ELSEVIER SCI LTD | Source: | CONSTRUCTION AND BUILDING MATERIALS, 184, p. 68-75 | Abstract: | This study evaluates the immobilization potential of Rn-222 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. (C) 2018 Elsevier Ltd. All rights reserved. | Notes: | [Gijbels, Katrijn; Vandevenne, Niels; Schreurs, Sonja; Schroeyers, Wouter] Hasselt Univ, Nucl Technol Ctr, CMK, Agoralaan Gebouw H, B-3590 Diepenbeek, Belgium. [Lacobescu, Remus Ion; Pontikes, Yiannis] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Leuven, Belgium. | Keywords: | Alkali-activated material; Ground granulated blast furnace slag; Phosphogypsum; Naturally occurring radionuclide material; Radon exhalation; Building material;Alkali-activated material;Ground granulated blast furnace slag; Phosphogypsum; Naturally occurring radionuclide material; Radon exhalation; Building material | Document URI: | http://hdl.handle.net/1942/28806 | ISSN: | 0950-0618 | e-ISSN: | 1879-0526 | DOI: | 10.1016/j.conbuildmat.2018.06.162 | ISI #: | 000443666200008 | Rights: | 2018 Elsevier Ltd. All rights reserved | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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