When starting a construction project in Ghana — whether a home, warehouse, or bridge — one of the most important decisions you’ll make is choosing the right grade of concrete.
Concrete grade determines the strength, durability, and performance of your structure. Using the wrong grade can lead to cracking, structural failure, or overspending on unnecessary materials.
In this article, Jobadee Concrete explains how concrete grades work, what each grade is suitable for, and how to choose the best one for your building project in Ghana.
What Is Concrete Grade?
Concrete grade refers to the compressive strength of a concrete mix after 28 days of curing, measured in Megapascals (MPa).
It is represented by symbols like M20, M25, M30, where “M” stands for Mix and the number indicates its strength.
For example:
- M20 concrete has a compressive strength of 20 MPa (or 20 N/mm²) after 28 days.
- M25 concrete has a strength of 25 MPa, and so on.
The higher the grade, the stronger and more durable the concrete — but also the higher the cost due to more cement and denser aggregates.
Common Concrete Grades Used in Ghana
| Concrete Grade | Typical Use | Description |
|---|---|---|
| M15 | Blinding, walkways, non-structural works | Low-strength concrete used as a base layer or surface levelling mix. |
| M20 | Residential foundations, floor slabs | Standard grade for most small to medium homes and buildings. |
| M25 | Columns, beams, retaining walls | Popular structural grade for reinforced concrete frames. |
| M30 | Commercial buildings, bridges, heavy slabs | High strength for medium to large projects. |
| M35 – M40 | High-rise buildings, industrial floors | Used in heavy-load or specialized structures. |
| M45+ | Airports, dams, advanced infrastructure | Specialized concrete for extreme load-bearing and durability. |
How to Choose the Right Concrete Grade for Your Project
1. Type of Structure
Different parts of a building require different grades:
- Blinding layer – M10 or M15
- Foundations and slabs – M20
- Columns and beams – M25 or M30
- High-load structures – M35 and above
At Jobadee Concrete, we help clients select the correct grade for each structural element, ensuring safety and cost-effectiveness.
2. Load Requirements
The amount of weight your structure must support affects your concrete choice.
Heavier structures — such as warehouses or bridges — require higher-grade mixes for better compressive strength.
3. Environmental Conditions
If your building is exposed to moisture, salt, or chemicals (common in coastal areas like Tema or Takoradi), you’ll need a more durable mix such as M25–M30 with waterproofing additives.
4. Budget and Cost Efficiency
Higher grades cost more, but using the right mix for the right section saves money in the long run.
Jobadee Concrete provides accurate mix designs to balance cost and strength — so you don’t overpay for unnecessary high-grade concrete.
5. Engineer’s Specifications
Always consult your structural engineer or architectural drawings before ordering concrete.
These documents specify the correct grades for foundations, slabs, and columns according to Ghana’s building standards.
Ready-Mix Concrete Grades from Jobadee Concrete
At Jobadee Concrete, all mixes are produced under strict computerized batching systems, ensuring accurate proportions and consistent quality for every delivery.
We supply the following standard grades (and custom mixes on request):
✅ M15, M20, M25, M30, M35, M40, M45
✅ Custom mix designs for unique structural or environmental needs
✅ Admixtures for waterproofing, strength, or rapid setting
✅ Quality-tested batches before dispatch
Whether you’re building a home, road, or high-rise, our team ensures your concrete grade perfectly matches your project’s requirements.
Benefits of Choosing Jobadee Concrete
- Precision: Computerized batching for accurate mix ratios
- Durability: Ghana Standards Authority–certified materials
- Reliability: Same-day delivery across Greater Accra
- Expert Advice: Free consultation to choose the right grade
- Support: Technical guidance from mix to pouring stage
Conclusion
Choosing the right concrete grade in Ghana isn’t just a technical decision — it’s the foundation of your project’s success.
The correct mix ensures safety, strength, and cost efficiency, while the wrong one can compromise your structure.
At Jobadee Concrete, we simplify this decision by offering expert guidance, quality-controlled production, and reliable delivery from our batching plants in Tema Community 5 and McCarthy Hill (Mallam–Accra).
Let’s help you build stronger, safer, and longer-lasting structures across Ghana.
📍 Our Branches:
- Tema Community 5 (Same building as Jobadee Blocks Factory)
- McCarthy Hill, Mallam – Accra
📞 Phone / WhatsApp: 054 752 1845
📞 Additional Phone Numbers:
0542 611 989
0543 181 545
0247 139 669
