Premium Grade GEN 3 Concrete - C20/25 Strength

GEN 3 Concrete (C20/25) has a lower strength classification than GEN 4 (C25/30). While GEN 3 is suitable for most demanding structural applications, GEN 4 is specified for specialised high-strength requirements or where exceptional load-bearing capacity is essential.

For major structural applications using GEN 3 Concrete, we recommend having a structural engineer provide specifications and calculations. Our technical team can work directly with your engineer to ensure the concrete mix meets all design requirements.

GEN 3 Concrete works excellently with traditional steel reinforcement (rebar), welded mesh, and high-performance fibre reinforcement. The specific reinforcement should be determined based on structural calculations and application requirements.

GEN 3 Concrete typically achieves initial set within 4-5 hours, depending on weather conditions. It reaches approximately 50% of its design strength within 3 days, 75% within 7 days, and continues developing strength for up to 28 days to reach full design strength.

Standard GEN 3 Concrete provides good durability in most environments. For marine applications or exposure to salt water, we recommend specifying additional requirements such as sulphate-resistant cement or specific admixtures to enhance durability. Our technical team can advise on marine-grade modifications.

Proper curing is essential for GEN 3 Concrete to reach its full strength potential. We recommend maintaining moisture through water spraying or curing compounds, protecting from rapid drying and temperature extremes, and allowing adequate curing time (minimum 7 days) before subjecting to heavy loads.

Yes, GEN 3 Concrete can be polished to achieve a high-quality decorative finish. Its higher strength characteristics make it particularly suitable for polished concrete applications in commercial environments where both aesthetics and durability are required.