List of Asphaltic Materials

Asphaltic materials include the following types:

•HMA,

•RHMA-G,

•FDR-FA: full depth recycled material with foam asphalt

•PDR: partial depth recycled materials, using either engineering emulsion (EA) or foam asphalt (FA), either produced in-place (PDR), or through cold central plant (PDR/CCPR)

•CCPR-EA and CCPR-FA: cold central plant recycled materials using either engineering emulsion or foam asphalt

Although they are not quite as well bounded as typical HMA, FDR-FA, PDR/CCPR-FA, and PDR/CCPR-EA materials are strongly enough that viable beams (AASHTO T 321) and cores (AASHTO T 320) can be produced and tested in the laboratory. These materials may therefore be characterized the same way as HMA.

PDR-EA was characterized using AASHTO T 321 and T 320 using specimens cut from slabs taken from California highway. CCPR-EA is essentially the same as PDR-EA in CalME until additional data become available.

FDR-FA was characterized using a combination of lab testing and field testing. In particular, the stiffness master curve was developed based on AASHTO T 321 frequency sweep using beams cut from an accelerated pavement testing (APT) track. The fatigue damage model was developed based on APT data. The permanent deformation model was assumed to be the same as a RHMA-G mix.

PDR-FA and CCPR-FA are assumed to be the same as PDR-EA (not FDR-FA) until more data become available.

It is possible in the future to use lower variability of CCPR materials compared to PDR materials, once more data become available.