go fck yourself
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fc'=0.87 fck fc'= cylinder strength fck= cube strength
fc'=0.785 fck fck=1.273 fc' fc'=strength of cylinder fck=strength of cube
C20/25
fck you
Frederico Caldeira Knabben
The modulus of elasticity of concrete is denoted by Ec .Ec = 5000 sqrt fck as per IS standardswhere, fck- The compressive strength of concrete at 28 days in N/mm2 .
To calculate the target mean strength for concrete, you first determine the desired characteristic strength (fck) based on design requirements. Then, account for a specified margin of safety, typically using a standard deviation from previous test results to establish the target mean strength (fct). The formula commonly used is: Target Mean Strength = fck + 1.64 × standard deviation, where 1.64 corresponds to a 95% confidence level. This ensures that the concrete produced will meet the required strength with a high degree of reliability.
1. YOLO. :D ( you only live once ) 2. FISH ( fck t stuff happens ) 3. - don't fck w. the original
the compressive strength can be converted in to flexural strength by following formula of IS code 456-2000fcr=0.7^/- fck fcr= flexural strength fck= characteristic compressive strength in N/mm2
What you can do with your cat is that you can, play catch, pet her/him, play hide and go seek!!?