Want this question answered?
st4 is just a standard type concrete probably comparable to c40 structural concrete, pav 2 is the equivalent to c35 concrete with air bubbles, mostly used in paving works
Standard deviation is a statistical concept and not applicable to concrete.
it is in arithmetic
becos precast girders are not cast in -site and therefore faster. they also available in standard size.
Bearing Capacity Calculation
In America: 8x8x16 inches, This is the standard CMU: Concrete Masonry Unit There also the half blocks 8x8x8. Source: http://concreteblocksizes.blogspot.com/
What is the equivalent Indian standard to ISO 2553?
What is the equivalent british standard for is -9550;2001
The standard for concrete cube testing is to put the cube under increased pressure. The pressure is increased until the cube breaks and determines the cubes compression strength.
You cannot calculate standard deviation for objects such as concrete cubes - you can only calculate standard deviation for some measure - such as side length, surface area, volume, mass, alkalinity or some other measure.
If is standard concrete it is usually 3000 psi mix
Pakistan standard time equivalent to +0500 UTC in world time