Note in core procedure in punching mistake
CORE=69 mm
Surface Area of Core= π *r2= 3.14*34.5*34.5=3737.385 Sq mm
Rate of loading per Second in KN for Core =0.0002287 Kn/Sq mm/sec *3737 Sq mm = 0.85473 Kn/sec
Rate of loading per Minute=0.85473*60=51.28 Kn/Min
IS 516-1959 page no 20 section 9.8
Procedure- The Load shall be applied continuously and without shock at a rate of 140 Kg/Sq cm/min.
In machine load applied KN/Sq mm /sec.
1st convert kg/sq cm/min to KN/ Sq mm/sec.
1 kg=0.0098 KN, 1 Sq cm= 100 Sq mm, 1 Min = 60 sec
so 140 Kg/Sq cm/min=...
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