Regardless of whether you are searching for the correct domestic or business concrete mix for your building work, or are only inquisitive about the various grades of cement and might want to know more, read on to get a comprehension of these various sorts of concrete and their uses, or get in contact today by calling us on +225 2724353893
Understanding Grades of Concrete
Grades of cement are characterized by the strength and makeup of the concrete, and the lowest strength the concrete ought to have following 28 days of curing. The concrete strength is measured in MPa, where M represents Mix and the MPa signifies the overall strength (e.g. M20).
The compressive strength of concrete after 28 days of curing is defined in ascending number of 5 beginning at 10. For example, C10 corresponds to a strength of 10 Newtons, C15 corresponds to a strength of 15 Newtons, C20 corresponds to a strength of 20 Newtons…etc.
But what is the difference between C20 concrete and M20 concrete?
M20 stands for CUBE’s characteristics strength and C20 cylindrical strength after a curing period of 28 days which represents 30 N/mm2.
Usually Strength of CYLINDER sample = 0.8 Strength of CUBE.
Hence M20 is equivalent to C16 and M25 is equivalent to C20.
The standard CUBE size is 15*15*15 cm and for CYLINDER it is 15 cm diameter and 30 cm height.
Usually CYLINDER specimen shows higher characteristic strength than CUBE specimen.
The table below shows different mixes of various proportions of constituents such as cement, sand and coarse aggregates. For example, M20 denotes a ratio of 1:1:5:3.
Concrete Design by Volume Ratio
Prescribed Concrete Design Mixes
