Sulphate Resisting Clinker

Description

1. Product Overview
Sulphate Resisting Clinker is a specialized hydraulic binder manufactured from selected raw materials with a controlled tricalcium aluminate (C₃A) content of ≤5.0%, designed to deliver exceptional resistance to sulphate attack in aggressive environments. Its primary industrial use is the production of Sulphate Resisting Portland Cement (SRPC) for concrete foundations, marine structures, and sewage systems exposed to high sulphate concentrations in soil or groundwater. The key value proposition is the extension of structural service life by up to 300% in sulphate-rich conditions versus Ordinary Portland Cement (OPC) clinker, reducing lifecycle maintenance costs. Strategically, it is critical for infrastructure projects in coastal, industrial, and mining regions where soil and water sulphate levels exceed standard thresholds (≥1500 ppm SO₄²⁻).

2. Key Specifications & Technical Characteristics

• Chemical Composition: C₃A (Tricalcium aluminate) ≤5.0%; C₄AF ≥12.0%; free CaO ≤1.0%; MgO ≤5.0%; SO₃ ≤1.5%; Loss on Ignition (LOI) ≤1.5%

• Purity / Grade: SRPC clinker grade – complies with ASTM C150 Type V, EN 197-1 CEM I-SR, and BS 4027 standards

• Physical Characteristics:

  • Form: Nodular, hard-burnt granules

  • Color: Dark grey to black (standard)

  • Particle size: 5–25 mm typical (75% passing 25 mm)

  • Bulk density: 1,300–1,450 kg/m³ (loose); 1,500–1,600 kg/m³ (tapped)

  • Blaine specific surface (after grinding target): 300–380 m²/kg

• Packaging Options: Bulk vessel shipment; 1.5 MT big bags; 50 kg multi-ply paper bags (on pallets)

• Shelf Life: 12 months from date of manufacture when stored in dry, covered conditions (RH <70%); no hydration or strength loss if protected from moisture ingress

3. Core Industrial Applications

• Primary industries: Heavy civil engineering, marine construction, wastewater treatment, mining infrastructure, tunnel boring, foundation piling

• Specific use cases:

  • Marine structures: Ports, piers, seawalls, and offshore platforms exposed to tidal sulfate-rich seawater (2,700 mg/L SO₄²⁻ typical)

  • Underground drainage and sewage: Pipes, pumping stations, and treatment tanks with bacterial sulphate reduction producing H₂SO₄

  • Agricultural and industrial slabs: Feedlots, fertilizer storage, and chemical plant floors where sulphate-bearing solutions percolate

• Performance vs. alternatives: Outperforms CEM II or CEM III blends by offering stable C₃A control without blending variability; lower permeability and higher sulfate resistance than ground granulated blast-furnace slag (GGBS) alone

• Efficiency advantage: Reduces concrete replacement frequency by 2–4x in aggressive soils; lowers total project carbon footprint per service year compared to frequent repairs with OPC

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified kiln line; real-time XRD analysis for C₃A control on every 200-ton batch; guaranteed ≤5.0% C₃A with standard deviation <0.3%

• Supply reliability: 20,000 MT monthly production capacity; 24/7 load-out with draft survey and third-party sampling at load port; average shipping lead time <14 days from order to FOB

• Logistics capability: Direct access to deep-water terminals (Panamax / Supramax vessels); 5,000 MT storage silos for just-in-time bulk loading

• Price competitiveness: Tier-1 clinker price point with 10–15% lower than EU/NA manufactured equivalents due to integrated quarry and power plant ownership

• Sustainability: Clinker factor 1.0 (no fillers) – enables lower carbon SR cement blending; waste heat recovery system reduces CO₂/kWh by 18% vs. regional average

• Technical support: Full mill test certificates (MTC) per EN 197-2; laboratory grinding / mortar bar expansion testing (ASTM C1012) provided upon request; 24-hour QA consultation

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20 metric tons (MT) – sample pallet or trial bag order

• Bulk order standard: 20,000 MT per vessel (one shipment)

• Loading capacity:

  • 20-ft container (big bags): 25 MT approx. (16–18 bags of 1.5 MT)

  • 40-ft container (big bags / pallets): 27 MT approx.

  • Bulk vessel: 15,000 – 55,000 MT per shipment (Supramax / Panamax / Handymax)

• Incoterms available: FOB, CFR, CIF (main global ports: Rotterdam, Singapore, Houston, Jebel Ali, Shanghai)

• Lead time for samples: 5 working days

• Lead time for bulk (≥20,000 MT): 21 working days from L/C or TT deposit confirmation