One or more subbase layers may also be present but are not required. The joints may have either no load transfer devices or smooth dowel bars. Jointed slabs with load transfer devices other than dowel bars are not acceptable. A seal coat is also permissible above a granular base layer. Sampling design factors for this study are moisture, temperature, subgrade type, traffic rate, dowels, PCC thickness and base type.
All factors have two levels.
A base layer and one or more subbase layers may exist but are not required. A seal coat is also permissible above a granular base layer. JCRPs without load transfer devices or using devices other than smooth dowel bars at the joints are not included. Sampling design factors for this study are moisture, temperature, subgrade type, traffic rate, joint spacing, and PCC thickness. All factors have two levels.