Thrust block curing time
Thrust block curing time
(OP)
AWWA stipulates that thrust blocks must cure for 5 days before a water main is pressure tested (unless high-early is used). However, I understand that some contractors are routinely pressure testing immediately, without waiting for curing to occur. What is your experience with what is actually happening in the field? How diligent should we be in our enforcement of the 5-day rule?
Thanks
Thanks





RE: Thrust block curing time
Most of the time, the Contractors take a risk and move on taking shortcuts on the installation. Most of the time it work out, but not always.
The use of thrust blocks should be considered with great care. They are only as good as the stability of the soil. In locations where the soil may be disturbed by future construction, reliance on thrust blocks, particularly for large diameter pipe, is not a very good idea. The use of restrained joints and trench friction is a better idea.
RE: Thrust block curing time
http://www.ebaa.com/PDF/Connections.PD-01.pdf
RE: Thrust block curing time