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Microstructural Evaluation of Fibre-Reinforced Slag-Based Foams
Alkali-activated foam materials were produced using electric arc furnace steel slag and ladle furnace basic slag as precursors, sodium water glass (Na2SiO3) and sodium hydroxide (NaOH) as alkali activators, and hydrogen peroxide (H2O2) as a foaming agent. The anionic surfactant sodium dodecyl sulfate (SDS) was used for the stabilization of pores in the matrix. In order to improve the mechanical properties (fracture resistance expressed as bending strength), seven types of fibres (polypropylene (PP), polyvinyl alcohol (PVA), basalt (B), cellulose (C), steel fibre (S), mineral wool (M) and wood fibres (W)) were added to selected mixtures and embedded into the AAF matrix. The bending and compressive strength measurements show that the addition of fibres, especially PP, improved bending strength. Microstructural analysis gives an insight into the interfacial zones between the fibres and the AA matrix. Where a non-uniform distribution of fibres and/ or a weak contact between fibres and the matrix was detected, there was negligible or no impact on the mechanical properties. In the cases where the fibres were uniformly distributed and a good adhesion between fibres and the matrix was established, the bending strength increased.
Microstructural Evaluation of Fibre-Reinforced Slag-Based Foams
Alkali-activated foam materials were produced using electric arc furnace steel slag and ladle furnace basic slag as precursors, sodium water glass (Na2SiO3) and sodium hydroxide (NaOH) as alkali activators, and hydrogen peroxide (H2O2) as a foaming agent. The anionic surfactant sodium dodecyl sulfate (SDS) was used for the stabilization of pores in the matrix. In order to improve the mechanical properties (fracture resistance expressed as bending strength), seven types of fibres (polypropylene (PP), polyvinyl alcohol (PVA), basalt (B), cellulose (C), steel fibre (S), mineral wool (M) and wood fibres (W)) were added to selected mixtures and embedded into the AAF matrix. The bending and compressive strength measurements show that the addition of fibres, especially PP, improved bending strength. Microstructural analysis gives an insight into the interfacial zones between the fibres and the AA matrix. Where a non-uniform distribution of fibres and/ or a weak contact between fibres and the matrix was detected, there was negligible or no impact on the mechanical properties. In the cases where the fibres were uniformly distributed and a good adhesion between fibres and the matrix was established, the bending strength increased.
Microstructural Evaluation of Fibre-Reinforced Slag-Based Foams
RILEM Bookseries
Valente, Isabel B. (editor) / Ventura Gouveia, António (editor) / Dias, Salvador S. (editor) / Češnovar, M. (author) / Traven, K. (author) / Ducman, V. (author)
RILEM Spring Convention and Conference ; 2020 ; Guimarães, Portugal
Proceedings of the 3rd RILEM Spring Convention and Conference (RSCC 2020) ; Chapter: 30 ; 329-341
RILEM Bookseries ; 33
2021-07-06
13 pages
Article/Chapter (Book)
Electronic Resource
English
Microstructural Evaluation of Fibre-Reinforced Slag-Based Foams
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