Type V Portland cement is the highest sulfate-resistant grade available in the ASTM C150 classification. With C₃A content capped at just 5%, it is specifically engineered for extreme sulfate-exposure environments where ordinary Portland cement and even Type II would fail prematurely.
Why Type V Exists
In environments where sulfate concentrations in soil or groundwater exceed 1,500 ppm (or 1.5% by mass in soil), the destructive reaction between sulfate ions and the calcium aluminate hydrates of normal cement happens fast enough to compromise structural integrity within years rather than decades. Type V cement, with its strict C₃A limit, effectively starves this reaction of its primary reactant — extending service life by orders of magnitude in aggressive environments.
The Trade-Off
The price of high sulfate resistance is slightly lower early strength. Because C₃A contributes significantly to 1–7 day strength development, Type V cement gains strength somewhat more slowly than Type I or Type II. The 28-day strength remains fully comparable, but formwork stripping schedules and post-tensioning timelines may need to be adjusted accordingly.
Critical Use Cases
Type V is mandated by code in many coastal and marine applications, sewage treatment plants, and chemical-industry installations. In the Gulf region in particular, the combination of high-sulfate groundwater and coastal salinity makes Type V the default specification for major infrastructure projects.
| Parameter | Type V Specification | Standard |
|---|---|---|
| C₃A (Tricalcium Aluminate) | ≤ 5% | ASTM C150 |
| C₃S + C₄AF × 2 expansion | ≤ 25% | ASTM C150 |
| Sulfate Resistance | High | ASTM C150 |
| Min. Compressive Strength (3 days) | ≥ 8 MPa (1,160 psi) | ASTM C150 |
| Min. Compressive Strength (7 days) | ≥ 15 MPa (2,180 psi) | ASTM C150 |
| Min. Compressive Strength (28 days) | ≥ 21 MPa (3,050 psi) | ASTM C150 |
| Blaine Fineness | ≥ 280 m²/kg | ASTM C204 |
| MgO Content | ≤ 6% | ASTM C150 |
| SO₃ Content | ≤ 2.3% | ASTM C150 |
| Loss on Ignition | ≤ 3% | ASTM C150 |
| Sulfate Expansion (14d, ASTM C452) | ≤ 0.040% | ASTM C452 |
| Packaging | 50 kg PP bags · 1MT bags · Bulk | |
High Sulfate Exposure
Required when soil or groundwater sulfate concentrations exceed 1,500 ppm SO₄ or 1.5% in soil, as per ACI 318 recommendations.
- Soil SO₄ > 0.20%
- Water SO₄ > 1,500 ppm
- Exposure class S2 / S3
Marine & Coastal Zones
Seawater and sea air contain sulfate compounds. Type V ensures long-term concrete durability in ports, offshore platforms, and coastal foundations.
- Splash zone Critical
- Submerged Critical
- Tidal zone Critical
Sewage & Wastewater
Sewage contains biogenic H₂SO₄ and sulfate-reducing bacteria. Type V cement provides essential resistance for long service life in these environments.
- Sewer pipes Critical
- Treatment tanks Critical
- Pumping stations Critical
Industrial Floors & Tanks
Chemical plants and industrial floors exposed to sulfate-containing effluents, fertilizer storage, or process chemicals benefit significantly from Type V.
- Fertilizer plants Recommended
- Chemical storage Recommended
- Cooling towers Recommended
Packaging Options
- 50 kg PP bags Standard
- 1 MT jumbo bags Available
- Bulk vessel Project supply
- Private branding Available
Trade Terms
- FOB Dubai / Jebel Ali ✓
- CIF Destination ✓
- CFR Destination ✓
- L/C at sight Standard
Documentation
- Certificate of Analysis Every batch
- Sulfate Expansion ASTM C452
- Strength Results 3/7/28 day
- Bill of Lading Original
- SGS Inspection On request