What does c35 concrete mean when describing concrete?

C35 concrete refers to a specific grade of concrete that has a characteristic compressive strength of 35 megapascals (MPa) when tested at 28 days. The "C" indicates that it is a concrete mix, and the number signifies its strength classification, which is commonly used in construction to ensure the material meets structural requirements. This grade is suitable for various applications, including structural elements and pavements, where higher strength is necessary.