GGBS

Description

1. Product Overview

GGBS is a high-performance supplementary cementitious material (SCM) derived from rapid water quenching of molten iron blast furnace slag, subsequently dried and ground to a fine powder. It serves as a direct partial replacement for Portland cement in concrete production, delivering superior durability and a significantly lower carbon footprint. Strategically critical for global construction and infrastructure firms facing tightening emissions regulations, GGBS provides the highest value proposition where long-term structural integrity and sustainable sourcing are non-negotiable.

2. Key Specifications & Technical Characteristics

• Chemical Composition: CaO 30–42%, SiO₂ 32–38%, Al₂O₃ 12–18%, MgO 5–10%; low free lime & low alkali content

• Purity / Grade: Conforming to EN 15167-1 (Class A or B), ASTM C989 (Grade 80, 100, or 120), or BS 6699

• Physical Form: Fine, non-metallic, off-white to light-grey powder

• Particle Size (Blaine fineness): 350–500 m²/kg (typical Grade 100: ~420 m²/kg)

• Bulk Density: 1.0–1.2 g/cm³ (loose); 1.4–1.6 g/cm³ (tapped)

• Activity Index (7 days / 28 days): Grade 80 (≥55% / ≥75%), Grade 100 (≥65% / ≥95%), Grade 120 (≥75% / ≥115%)

• Packaging Options: Bulk pneumatic tanker (25–35 MT), 1.5 MT jumbo big bags, 25 kg multi-wall paper sacks (heat-sealed liner optional)

• Shelf Life: 12 months from production date when stored in dry, covered conditions; avoid moisture ingress

3. Core Industrial Applications

• Primary industries: Ready-mix concrete, precast concrete, infrastructure (bridges/tunnels/dams), marine construction, mass concrete foundations

• Operational use cases: Replace 30–70% of Portland cement. For sulfate attack resistance (up to 70% replacement); for low-heat mass pours (50–70%); for marine/coastal structures (50–65%)

• Performance advantage vs. alternatives (fly ash, silica fume): GGBS delivers higher long-term compressive strength (28–90 day), lower permeability (reduces chloride ingress by 80%+), and superior resistance to alkali-silica reaction (ASR) and sulfate attack. Unlike fly ash, GGBS provides consistent chemistry and does not rely on coal plant operations—critical for supply chain resilience.

• Efficiency gain: Reduces cement content by 40–60% → lower material cost per MPa; also reduces water demand and improves workability for given slump.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified production with real-time particle size monitoring; lot-to-lot coefficient of variation <3% for activity index.

• Supply reliability: Dedicated slag grinding plants located adjacent to major blast furnace sources; buffer stock holding >5,000 MT at origin ports.

• Logistics capability: Bulk vessel loading up to 15,000 MT per shipment; bagged container loading within 72 hrs of order confirmation.

• Price competitiveness: 30–45% lower cost per tonne than equivalent Grade 100 Portland cement, with long-term fixed-volume contracts available.

• Sustainability benefit: Embodied carbon (cradle-to-gate) 35–50 kg CO₂/tonne vs. OPC at 830–900 kg CO₂/tonne — directly supports EPD and LEED v5 / BREEAM targets.

• Technical support: Full mill certificates, XRF analysis per batch, mix design advisory, and on-call materials engineering support via global portal.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT (one flexitank or pneumatic self-discharge truck)

• Loading capacity (MT per container):

  • 20’ GP dry container: 25 MT (jumbo bags or palletized 25 kg sacks)

  • 40’ HC dry container: 28 MT (jumbo bags only; max weight limit per IMO/port)

  • Bulk vessel: 5,000–15,000 MT per hold

• Incoterms offered: FOB, CFR, CIF (major global ports)