Cement bulk density 1

[guying]

Hi,
I need to know de bulk density of the cement when in a silo.
Could anyone help me.
Tanks

Guy

 

[aggman]

According to ACI 313-97....

(Cement, clinker)
Density - 88#/ft^3
Internal Friction phi - 33 degrees
Effective Internal Friction delta - 42-52 degrees
Friction against wall mu prime - .6 concrete, .3 steel

(Cement, portland)
Density - 84 - 100 #/ft^3
Internal Friction phi - 24 -30 degrees
Effective Internal Friction delta - 40-50 degrees
Friction against wall mu - .4 - .8 concrete, .3 steel

 

[guying]

Thank you sir.