Inspection item and organization
Standard of product
Inspection result
Item evaluation
grain－size distribution
round hole screen,mesh size mm
Accumulated material retained of each mesh number(base on quantity)
Physical material retained of each mesh number(base on quantity)
5-20mm Continuous fraction
…
31.5
0-5
0
20.0
0-10
16.0
12
10.0
40-80
80
5.00
90-100
98
2.50
95-100
Phene density
480
……
Apparent density
210-300
290
Qualified
water absorption
<=0.8
14
softening coefficient
0.8
Grain coefficient
Ordinary first-class product
Drum pressure strength
Superior product
