Friction angle concrete to concrete

[ckdowns]

What is the friction angle between concrete and concrete?

 

[bluetree]

Believe the info in the link is from Table 11-6 in Foundation Analysis & Design by Bowles, who in turn lifted it from a NAVFAC 1971 manual. Bottom of table listed values for rock on rock, but Bowles equates it to masonry on masonry as well. Friction angle values range from 29 to 35 degrees. If this helps.

 

[bluetree]

link

http://www.finesoftware.eu/geotechn...te-friction-factors-for-dissimilar-materials/

 

[ckdowns]

Ok great. I did see that table but I didn't realize that relation. Thank you!