Ground Granulated Blast Furnace Slag (Iron Slag)

Description

Ground Granulated Blast Furnace Slag (Iron Slag)

This product can be used as a pozzolan in combination with cement. When mixed with cement, iron slag powder reacts with calcium hydroxide (a byproduct of cement hydration) to form a secondary gel. Over time, this secondary gel combines with the primary gel from cement hydration, enhancing the durability of concrete and significantly improving its resistance to corrosive agents. Due to its ability to reduce hydration heat, it is particularly recommended for mass concrete pours and construction in hot climates.

Additionally, this product can serve as a raw material for geopolymer cement production.

Studies indicate that up to 40% of cement can be replaced with this material.

Ground Granulated Blast Furnace Slag (Iron Slag)

Production Process of Blast Furnace Slag

Iron Slag Powder is an inevitable by-product of pig iron production in blast furnaces. When iron ore is melted at extremely high temperatures (approximately 1500°C), impurities rise to the surface as molten slag. The pinnacle of technology and artistry lies in converting this molten material into a valuable product.

Bana Bonyan utilizes a rapid chilling process, quenching the molten slag with a high-pressure water jet. This rapid cooling prevents the formation of a crystalline structure, resulting in a stable glassy (non-crystalline) substance with latent pozzolanic and cementitious properties. The output of this stage is sand-like granules known as ‘granulated slag.’ In the final stage, these granules are ground in highly advanced and precise mills to achieve the desired fineness (approximately 4600 cm²/g), producing the very fine and active GGBFS powder.

The optimal chemical composition of this product (including 35-40% SiO₂, 35-40% CaO, along with aluminum and magnesium oxides) complies with ASTM C989 standards, falling into grades 80, 100, and 120. Bana Bonyan focuses on the highest grade, delivering an exceptional product.

Ground Granulated Blast Furnace Slag (Iron Slag)

Key Advantages of Using Iron Slag Powder (GGBFS)

• Enhanced Mechanical Properties & Durability: Concrete made with GGBFS doesn’t just focus on initial strength but is engineered for a long future. Thanks to the secondary hydration process driven by silicates in the slag, the concrete gradually achieves a higher ultimate compressive strength compared to ordinary concrete. Its denser microstructure and lower porosity create a robust barrier against chemical attacks, offering exceptional resistance to destructive sulfate and chloride ions—the primary cause of rebar corrosion in marine and humid environments. This translates to a significant increase in the structure’s service life and reduced maintenance costs.

• Substantial Economic Savings: By replacing up to 40% of the cement content, direct material costs are noticeably reduced. In large-scale projects with high concrete volumes, such as dams and infrastructure, these savings lead to a considerable decrease in overall project costs.

  Explanation of changes:

  “Infrastructure. these” was corrected to “infrastructure, these”. The period after “infrastructure” was incorrect and created a sentence fragment. Replacing it with a comma properly connects the clause to the main sentence.

• Control of Heat of Hydration: One of the most critical advantages is the significant reduction in heat generated during hydration. This feature is vital for preventing thermal cracking in massive concrete pours like large foundations and dams.

• Environmental Sustainability: Using GGBFS as a recycled product drastically reduces cement consumption and greenhouse gas emissions. This contributes directly to achieving Green Building standards (like LEED) and fulfilling sustainability goals, embodying the principles of a circular economy.

• Improved Workability: Concrete containing GGBFS offers better workability and reduced bleeding, resulting in easier placement and a superior, denser final finish.

Activation of Slag for Cement Use

Research shows that locally produced slag can be effectively used in cement mixtures—provided it is rapidly cheald (rapidly cooled) after extraction from the furnace and ground to cement-like fineness (GGBFS). This process enhances its reactivity, allowing it to function as an efficient pozzolan in concrete.

Through collaboration with an iron smelting plant, we produce GGBFS by rapid chealding and finely grinding the slag. This treatment significantly increases its reactivity, making it suitable for high-performance concrete applications.

Packaging & Shipping:

• 📌 40 kg Laminated Bags (Moisture-proof for safe storage and transport)

• 📌 1.5 Tonne Jumbo Bags (An economical and safe solution for large projects)

• 📌 Bulk Delivery via Equipped Fleet (For clients with very high-volume needs)

Supply & Distribution

Our company is ready to supply GGBFS at competitive prices and deliver it nationwide in any required quantity.

📞 For Price Inquiry, Technical Consultation, and Orders: +98 912 080 5576
🌐 Website: www.banabonyan.com
📧 Email: info@banabonyan.com