Transitions and Jointing Detail

Typically, pavement transitions are used where immovable objects are incorporated in a pavement structure which results in joints or cracks becoming wide enough to affect load transfer or the potential for infiltration to take place during a rainfall event.

Transitions in RCC are necessary at some locations, such as where the RCC pavement is constructed next to an asphalt concrete pavement.

Figure 11 shows a diagram of such a transition. This example involves the use of a precast element but also shows the transition and the load transfer details at the joint while protecting the RCC/asphalt concrete interface and accommodating the relative movements between the two pavement types. It is important to note the extension of the subbase support beyond the joint and that both joints need to be properly sealed. Other areas requiring transition details would be the longitudinal joint subjected to frequent loading, changes in base type, or slab thickness.