The construction industry is embracing building stronger sustainable practices, and green concrete is seen as a sustainable option. By using recycled materials and eco-friendly alternatives, green concrete can significantly reduce carbon emissions compared to traditional concrete mixes without compromising on performance.
Three critical factors – compressive strength, fire resistance, and recycled concrete aggregates (RCA) – set green concrete apart from traditional virgin concrete products.
The first thing to note is that concrete performance depends on compressive strength, the ability to bear weight without crumbling. Traditional concrete achieves this through high cement content and virgin aggregates. Green concrete takes a different approach, substituting much of this with recycled materials and supplementary cementitious materials (SCMs). While this significantly lowers carbon emissions, it also creates new challenges. Finding the correct mix designs to match traditional concrete strength can be tricky.
Recycled Concrete Aggregates (RCA) are created by crushing demolished concrete. While RCA may initially deliver slightly lower strength due to residual mortar and porosity, proper mix design closes this performance gap, making it suitable for structural and non-structural applications.
Concrete’s natural composition makes it fire resistant, meaning green concrete needs to maintain this crucial safety feature. RCA and SCMs can improve the fire resistance, helping structures withstand high heat while protecting internal reinforcement, which is essential for long-term building safety.
When properly optimised, RCA mixes achieve 80-90% of virgin concrete’s compressive strength, more than enough for most structural needs.
Limitations of Green Concrete: RCA introduces higher porosity and variable moisture behaviour, which can impact strength and durability if not managed correctly.
DeepCure Repeller is a zero-VOC curing and densifying treatment specifically designed to elevate green concrete performance. It locks moisture into the concrete during those critical early days, giving the cementitious materials time to fully hydrate and reach their maximum strength. Its penetrating formula also works within the concrete itself – densifying the surface, tightening up the pore structure, and cutting down on water absorption through capillaries.
What you end up with is a tougher, longer-lasting slab that stands up better to wear, moisture, chlorides, and Australia’s unique weather conditions, while still letting the concrete breathe. That makes it particularly useful for green concrete in our regions warmer conditions, where you need durability and sustainability to actually work hand in hand. By pairing low-carbon concrete with effective curing and protection, DeepCure Repeller helps sustainable builds deliver real environmental gains without compromising on structural performance over time.
Locks in moisture to enhance hydration, helping cement mixes reach their full compressive strength.
Densifies the surface and refines pore structure, dramatically improving resistance to abrasion and chloride penetration, two key markers of long-term durability.
Creates a hydrophobic barrier that reduces permeability and moisture ingress, safeguarding green concrete in Australian conditions while maintaining breathability.
With DeepCure Repeller, you get the environmental benefits of green concrete without sacrificing strength, durability, or service life.
