Ultra-High Performance C40/C45 Concrete - 40-45N/mm² Strength

C40/C45 Concrete is typically specified for critical structural elements that require exceptional strength, such as high-rise building cores, major bridge structures, heavy industrial facilities, and infrastructure projects with extreme loading conditions. These grades are also specified for structures in aggressive environments requiring superior durability. Our article on why mix-on-site concrete is ideal for large commercial projects explains why volumetric delivery works so well for these demanding builds.

While standard concrete placing equipment can be used, C40/C45 Concrete often benefits from specialised placement techniques and equipment. This may include high-performance concrete pumps, advanced vibration equipment, and precision control systems. Our concrete pumping services team can advise on the optimal placement methodology for your project.

C40/C45 Concrete typically requires carefully engineered reinforcement designs, often incorporating high-yield steel, specialised spacing arrangements, or advanced pre-stressing systems. The reinforcement design should be specified by qualified structural engineers based on detailed structural analysis. For help working out quantities, our guide on how to calculate exactly how much concrete your project needs is a good starting point.

C40/C45 Concrete requires meticulous curing to achieve its full performance potential. This typically involves extended moisture retention using specialised curing compounds, controlled temperature conditions, and longer curing periods. Proper curing is critical to minimise the risk of thermal cracking and to develop full strength. Learn more about quality control throughout the process in our piece on the importance of high-quality concrete mixing for your project.

Yes, C40/C45 Concrete can be placed in cold weather with appropriate precautions. These may include heated mixing water, insulated formwork, and temperature monitoring systems. For winter placements, our technical team can provide specific recommendations and mix adjustments to ensure successful results. For practical advice, take a look at our guide on pouring concrete in winter and what you need to know.

C40/C45 Concrete is excellent for water-retaining structures due to its high strength and potential for very low permeability. For such applications, we can incorporate specialised admixtures to enhance impermeability and design the mix for optimal water-tightness. Additional joint treatments may be recommended for specific applications. Find out more about how we deliver to challenging sites in our article on concrete pumping for tight access sites.