The precast panels are fabricated at an established precast plant, preferably as close as possible to the installation site. For larger jobs, particularly in remote locations, it may be possible to set up a temporary precast bed near the jobsite. The concrete mixtures used are similar to those utilized for other precast prestressed elements and are not be restricted to "paving" mixtures. Steam curing, wet mat curing, or membrane curing are all options for precast pavement panels. 
DeliveryInstallation
Post-Tensioning After the panels are installed, the post-tensioning strands are threaded through the panels, anchored at the ends and tensioned. The post-tensioning tendons utilized to date have been 0.6-inch diameter 7-wire monostrand tendons. Generally, the strands are tensioned to 75% of their guaranteed ultimate tensile strength. After the tendons are tensioned, the stressing pockets or blockouts are patched. A fast-setting patch material can be used if necessary.
Grouting
The post-tensioning system used for precast prestressed pavement is a bonded post-tensioning system. Grouting not only provides an additional layer of corrosion protection for the post-tensioning strands, but also bonds the tendons to the pavement so that if it is necessary to remove a precast panel at a later time, the post-tensioning system will remain intact.
Precast pavement can be opened to traffic as soon as the panels are installed. Post-tensioning and grouting operations can be completed during a subsequent operation if necessary. The surface will be smooth enough to open to traffic and can be diamond ground during a subsequent operation if necessary.
