Enhanced Carbonation and Mechanical Performance of Bacteria-Based RMC Paste

Opportunity

The construction industry is a significant contributor to greenhouse gas emissions, primarily due to cement production. However, recent advancements in biotechnology have led to the development of microbial-based carbonation methods that can reduce the environmental impact of traditional carbonation methods. With a projected market size of US$12.3 billion by 2025, these sustainable carbonation methods have the potential to revolutionise the construction industry by offering a greener and more efficient alternative to conventional practices.

Technology

This invention introduces a bacteria-based method for providing CO₂ for the carbonation of RMC-based systems. The method employs ureolytic bacteria, urea and nutrients to release CO₂ through hydrolysis, which improves the strength and durability of RMC-based systems. This technological advancement provides a sustainable and efficient method for carbonating RMC-based systems, enhancing their mechanical performance and extending their lifespan.

Figure 1: SEM morphology image of the bacteria culture used in cement paste. 

Applications & Advantages

Main application areas include the construction of buildings, bridges and roads.

Advantages:

• Utilises bacteria-based carbonation, significantly reducing the environmental impact compared to traditional methods
• Improves the strength and durability of RMC
• Reduces greenhouse gas emissions associated with cement production