By American Association of State Highway and Transportation Officials
Softcover, 212 pages.
Read Online or Download Mechanistic-empirical pavement design guide : a manual of practice PDF
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Extra resources for Mechanistic-empirical pavement design guide : a manual of practice
Sample text
The unit of rutting calculated by AASHTOWare Pavement ME Design is inches (millimeters), and represents the maximum mean rut depth between both wheel paths. AASHTOWare Pavement ME Design also computes the rut depths within the HMA, unbound aggregate layers, and foundation. 6 DISTRESS OR PERFORMANCE INDICATORS TERMS—PCC-SURFACED PAVEMENTS • Mean Transverse Joint Faulting (JPCP)—Transverse joint faulting is the differential elevation across the joint measured approximately 1–3 ft from the slab edge (longitudinal joint for a conventional lane width), or from the rightmost lane paint stripe for a widened slab.
Since joint faulting varies significantly from joint to joint, the mean faulting of all transverse joints in a pavement section is the parameter predicted by AASHTOWare Pavement ME Design. The unit of faulting calculated by AASHTOWare Pavement ME Design is inches. Faulting is an important deterioration mechanism of JPCP because of its impact on ride quality. Transverse joint faulting is the result of a combination of repeated applications of moving heavy axle loads, poor load transfer across the joint, free moisture beneath the PCC slab, erosion of the supporting base/subbase, subgrade, or shoulder base material, and upward curling of the slab.
JPCP—The minimum thickness of JPCP modeled in the software is 6 in. In this type of PCC pavement, the minimum joint spacing is 10 ft. , ranging from 10 to 20 ft) in order to minimize transverse cracking from temperature gradient and drying gradient shrinkage stresses. , dowels). JPCP may have tied or untied longitudinal joints. However, most of the test sections included in the global calibration process had tied longitudinal joints. The effect of tied or untied longitudinal joints would need to be defined and considered through the local calibration process.