Durability Performance of Hybrid Binder Concretes Containing Non-Ferrous Slag and Recycled Aggregates

Pithchai P. Sivakumar, Yury A. Villagrán-Zaccardi, Thomas Lapauw, Elke Gruyaert, Stijn Matthys and Nele De Belie ()
Additional contact information
Pithchai P. Sivakumar: Magnel-Vandepitte Laboratory for Structural Engineering and Building Materials, Ghent University, Technologiepark Zwijnaarde 60, BE-9052 Ghent, Belgium
Yury A. Villagrán-Zaccardi: Magnel-Vandepitte Laboratory for Structural Engineering and Building Materials, Ghent University, Technologiepark Zwijnaarde 60, BE-9052 Ghent, Belgium
Thomas Lapauw: Resourcefull BV, Naamsevest 18, BE-3000 Leuven, Belgium
Elke Gruyaert: KU Leuven, Technology Campus Ghent, Department of Civil Engineering, Materials and Constructions, Gebroeders De Smetstraat 1, BE-9000 Ghent, Belgium
Stijn Matthys: Magnel-Vandepitte Laboratory for Structural Engineering and Building Materials, Ghent University, Technologiepark Zwijnaarde 60, BE-9052 Ghent, Belgium
Nele De Belie: Magnel-Vandepitte Laboratory for Structural Engineering and Building Materials, Ghent University, Technologiepark Zwijnaarde 60, BE-9052 Ghent, Belgium

Sustainability, 2023, vol. 15, issue 8, 1-19

Abstract: Novel hybrid binder concrete mixes with alkali-activated non-ferrous slag (NFS), either alone or in combination with blast furnace slag (BFS), as partial replacement of Portland cement, and containing 50% recycled aggregates, were successfully manufactured. The compressive strength, carbonation resistance, chloride resistance, frost scaling, sorptivity coefficient, and water penetration resistance were thoroughly assessed. The presence of recycled aggregates had an adverse effect on early-age strength, but after 91 days there was no difference between concrete with and without recycled aggregates. The chloride-binding capacity was enhanced in the BFS/NFS system with recycled aggregates (reduction in chloride ingress coefficients of ~28–35% compared to recycled concrete with NFS only). This is most likely caused by the binding of Cl ions in calcium alumina silicate hydrates (C-A-S-H) and ettringite phases. However, when compared to the system with virgin aggregates, BFS/NFS concrete with recycled aggregates showed increased carbonation rate (+30%) and frost scaling (+15%). Durability properties, such as sorptivity and water penetration resistance, were positively affected by the curing time for the BFS/NFS system (~35–45% further improvement from 28 to 90 days with respect to the NFS system). Specimens that were wet cured for 91 days showed improved results compared to the 28-day cured samples due to the slow pozzolanic reaction of the NFS.

Keywords: non-ferrous slag; recycled aggregates; hybrid binders; carbonation; chloride penetration; water transport (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/8/6338/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/8/6338/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:8:p:6338-:d:1117849

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().