how much tensile strength of M20 grade concrete at 28 Days
500psi
3000 psi concrete weighs Approx 3900 Lb/yd3
Proportions for different grades: Cement : Sand : Gravel 1 : 2 : 5 for grade C15(general purpose concrete) 15 mpa 1 : 2 : 4 for grade C25(strong) 25 mpa 1 : 2 : 3 for grade C30(very strong) 30 mpa Remember the proportion is done in terms of volume. This means the above proportions are correct if using the same measure.
3000 psi 3500?
It is exactly 4351 psi but generally referred to as 4500 psi.
how much tensile strength of M20 grade concrete at 28 Days
C25 concrete is a concrete having compressive strength of 25MPa when tested at the 28th day after casting. The specimen can be cube(150x150x150) or cylindrical(125mm by 250mm high). The cube strength has 0.8 times that of cylindrical specimen due to shape factor.
500psi
3000 psi concrete weighs Approx 3900 Lb/yd3
Proportions for different grades: Cement : Sand : Gravel 1 : 2 : 5 for grade C15(general purpose concrete) 15 mpa 1 : 2 : 4 for grade C25(strong) 25 mpa 1 : 2 : 3 for grade C30(very strong) 30 mpa Remember the proportion is done in terms of volume. This means the above proportions are correct if using the same measure.
3000 psi 3500?
If is standard concrete it is usually 3000 psi mix
Generally speaking, concrete is rated anywhere from 2000 psi to 10,000 psi. Of course if you do NOT use the proper ratio of aggregate (usually sand) to cement and water you can make concrete that is even weaker. When concrete is ordered from a delivery company, you specify the strength of he mix or pour that you want.
4500
C25 Blended. Would be more than strong enough if there are just people walking on it. 10mm stone will give a better finnish too. Regards Colin
5 sacks of cement per 1 yard of concrete