Grade of concrete and strength. Cement

Question

Accepted Answer

The grade of concrete refers to its strength and durability. Cement is a key ingredient in concrete.

The grade of concrete determines its compressive strength and is denoted by a number, such as M20 or M30.
The strength of concrete is measured in terms of its ability to resist compression.
Cement is a binding agent that holds the concrete together.
The quality and type of cement used can impact the strength and durability of the concrete.
Different grades of concrete are used for various applications, such as residential buildings, bridges, or dams.

Accepted Answer

Grade of concrete:- cube having size 15cm×.15cm× 15cm, after 28day curing .

3 days curing strength =40%

7day curing strength =60%

14 day curing strength =84%

M10 =1:3:6

M15=1:2:4

M20=1:1.5:3

M25= 1:1:2

M30=1: .5: 1