About M40 Ready Mix Concrete
M40 Ready Mix Concrete (40 N/mm² at 28 days) is an ultra high strength concrete grade used in the most demanding structural and infrastructure applications — prestressed concrete girders, bridge decks, high-rise core walls, precast structural elements, and major infrastructure projects. M40 requires sophisticated mix design, premium cementitious materials (often including silica fume or fly ash), powerful superplasticisers, and rigorous QC at every stage. Only possible with advanced batching plant technology.
Delivered by transit mixer to your construction site across Chennai, Chengalpattu, Kanchipuram, Thiruvallur, and all of Tamil Nadu. Minimum order 3 m³. GST invoice on every pour.
Applications
Bridge Decks
PSC bridge decks & girders
Core Walls
High-rise core & shear walls
Precast
Structural precast elements
Infrastructure
Major infrastructure projects
Industrial Floors
Heavy-duty industrial floors
Mix Design Parameters (ISI:456)
| Grade | M40 |
| Characteristic Strength | 40 N/mm² (40 MPa) at 28 days |
| Standard | ISI:456 |
| Mix Designation | Design Mix (ISI:10262) |
| Cement Content | 380 – 420 kg/m³ (with SCM) |
| Water-Cement Ratio (Max) | 0.35 |
| Supplementary Materials | Silica fume / Fly ash / GGBS |
| Admixtures | High-range water reducer + retarder |
| Slump Range | 150 – 200 mm (SCC grade possible) |
| Minimum Order | 6 m³ |
Why Choose RMC M40?
- ✓Highest commercially available grade — maximum structural performance
- ✓Ultra-low w/c ratio with SCMs — exceptional durability
- ✓Silica fume or fly ash addition — impermeable dense microstructure
- ✓Advanced admixtures — self-placing capable if specified
- ✓Full QC programme with third-party cube testing available
Important Notes
⚠️ M40 requires advance technical consultation and a pre-approved design mix. Minimum order 6 m³. Trial mixes and cube testing mandatory before first pour. Contact our technical team for project-specific M40 mix design and availability.