Article (Scientific journals)
Internal sulfate attack in mortars containing contaminated fine recycled concrete aggregates
Colman, Charlotte; Bulteel, David; Thiery, Vincent et al.
2021In Construction and Building Materials, 272
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Keywords :
Recycled aggregates; sulfate attack; microstructure; waste management; secondary ettringite formation
Abstract :
[en] Internal sulfate attack can be caused by the gypsum residues present in fine recycled aggregates (FRA). Asopposed to the better known external sulfate attack or Delayed Ettringite Formation (DEF), the sulfates inthis context are provided by a gypsum contamination of the aggregates. Mortars made with contami-nated FRA were subjected to different conditions, to assess which parameters had an influence on the sul-fate attack reaction. Their mechanical properties and microstructure are investigated. Results showedthat gypsum content, porosity, temperature and alkalinity influenced the consequences of sulfate attack.However, the gypsum size distribution and cement type did not.
Disciplines :
Civil engineering
Author, co-author :
Colman, Charlotte ;  Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Bulteel, David
Thiery, Vincent
Rémond, Sébastien
Michel, Frédéric ;  Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Courard, Luc  ;  Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Language :
English
Title :
Internal sulfate attack in mortars containing contaminated fine recycled concrete aggregates
Publication date :
2021
Journal title :
Construction and Building Materials
ISSN :
0950-0618
eISSN :
1879-0526
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
272
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Valdem
Funders :
Interreg France-Wallonie-Vlaanderen [BE]
Available on ORBi :
since 18 May 2020

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