Usually 6”x12” size cylindrical samples are taken to test
compressive strength of concrete. But 4”x8” sized samples are also satisfy ASTM
C31/C31 M03. It is noticed that the 4”x8” sample provides some advantage.
These are as follows:
1. More than three samples of 4”x8” can be made with the concrete that required for a 6”x12” cylinder sampling i.e., 70% concrete is saved.
2. Valuable
natural resources( stone, cement, sand etc.) are also saved.
3. Preservation
i.e., curing, storing etc. is also easy.
4. Carrying to
laboratory is also easy.
5. According to
ASTM Standard, the result derived from both 6”x12” and 4”x8” sample are same.
6. Test fee is
also less compared to that of 6”x12” sample.
Thus considering above points it can be concluded that making of 4”x8” cylinder
is more easy, comfortable, economical and environment friendly than that
of 6”x12”.
