Réactivité à jeune age des laitiers de haut-fourneaux dans des matrices cimentaires
ActiSlag is a four-year RFCS project with the aim to increase ground granulated blast furnace slag (GGBS) value and extend its field of applications via improving short-term reactivity.
To achieve this goal, we investigated the relationship between slag characteristics (glass structure, microstructure) and slag activation mechanisms (dissolution / hydration).
In this project the two industrial partners – Ecocem and ArcelorMittal – were reinforced with four research laboratories combining their expertise from different fields: civil engineering (LMDC), glass science (TU Clausthal), slag value creation (FEhS) and high-resolution measurements (CNRS-CEMHTI) to reach these objectives.
In this project the two industrial partners – Ecocem and ArcelorMittal – were reinforced with four research laboratories combining their expertise from different fields: civil engineering (LMDC), glass science (TU Clausthal), slag value creation (FEhS) and high-resolution measurements (CNRS-CEMHTI) to reach these objectives.
This webinar is an overview of the work and results achieved over the last four years.
Agenda
> Introduction – Judit Kaknics (ArcelorMittal Global R&D)
o WP1: Characterization of industrial samples
- Classical characterization and selection of industrial GBS samples – Andreas Ehrenberg (FEhS)
- Estimate the cooling rate of GBS particles – Method development & industrial samples – Daniel Hart (TU Clausthal)
- Describing the glass structure and polymerization degree of GBS – Valérie Montouillout (CNRS-CEMHTI)
o WP2: Upstream modification of granulated blast furnace slag
- Chemical modifications of major and minor compounds and investigation of industrial feasibility – Judit Kaknics (ArcelorMittal Global R&D)
- Effect of cooling rate on slag mechanical performance – Andreas Ehrenberg (FEhS) & Daniel Hart (TU Clausthal)
o WP3: Optimal combination of upstream and downstream activation of granulated blast furnace slag
- Combining upstream and downstream modifications – Simon Blotevogel (LMDC & Ecocem)
- Understanding of hydration mechanism – Simon Blotevogel (LMDC & Ecocem)
- Role of TiO2 – Simon Blotevogel (LMDC & Ecocem)
o WP4: Product development: formulations for specific markets
- Development of concrete and tile adhesive formulations with modified GGBS – Simon Blotevogel (LMDC & Ecocem)
> Main conclusions of the project and discussion