The GGBS material (granulated fly ash) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam. The final material is the granulated slag (GGBS) that comes from the boiler extinguishing while for the grinding process a granulator is used.
General description
GGBS material is a high whiteness additive used in combination with Portland cement to produce superior quality concrete and other cementitious mortars (Fig.1). Its share in building mortar can reach – in weight – of up to 70%, according to I.S EN 206-1.
Figure 1. GGBS impact on the compressive strength of a geopolymer sample
(Source: Apriany Saludung et al, 2018).
Features – Benefits
GGBS material is a calcareous fine powder with hydraulic and pozzolanic properties. It consists mainly of active calcium oxide (CaO), active silicon oxide (SiO2) and aluminum oxide (Al2O3). The remaining part could contain iron oxide (Fe2O3) and other compounds.
The chemical composition of the material offered by our company is as follows:
The combination of GGBS in the production of cementitious mortars and concrete provides important features during the application and the final result, such as:
- Ease of use: Makes mixing easier
- Resistance to compression forces of the application, especially at high temperatures
- Lower hydration temperature: Reduces the risk of thermal cracking
- Reduction of water permeability and porosity, improving the durability of cement
- Resistance to sulphides: Increases the life-duration of the building
- Chloride resistance: Helps reduce the solubility of residues, such as chlorides
- Protection against pH imbalance in cement construction
- White color: Reduces the requirement of pigment and creates a better aesthetic finish
- Final result: Fewer defects and smoother surface finish
Benefits of GGBS in concrete
Leachate reduction
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