I am designing a cement-treated base (CTB) using the PCA design guidelines for a pavement over soft ground. The subgade will be a silty soil. I was asked by the PM if my design included AASHTO H-25 loading and now I understand it has to do with how axle loads are transferred to drainage structures (culverts?). The road is rural and most of the heavy traffic is 56,000 pound 4-axle gravel dumptrucks with a tandem axle (the fourth axle is retractable).
The PCA design procedure uses the fatigue factor to estimate CTB thickness. Does the AASHTO H-25 load diagram apply to the fatigue factor calculation?
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
More and more manufacturers are getting into the Industrial Internet of things (IIoT). Those that succeed early in the IIoT arena can be leaders in their market, or solidify their position. Download Now