Determination of Mechanical Properties for Unstabilized Drainage Layer and Implementation in Mechanistic–Empirical Pavement Design Guide

Zhang, Yinning; Wang, Xudong; Li, Ying; Wang, Linbing; Boudreau, Richard L.

doi:10.1061/(asce)mt.1943-5533.0001716

Cited by 1 publication

(3 citation statements)

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“…Zhang and colleagues ( 28 ) reported ATPB stiffness values ranging from 400 to 2000 MPa (58–290 ksi), and concluded, “The stiffness of conventional asphalt concrete can be 5.5–7 times larger than the stiffness of ATPB even in a dry state.” As shown in Table 2, agencies have reported a wide variation in the structural coefficient ( a 2 ) used to represent ATPB. The AASHTO Guide presents a relationship between the structural layer coefficient a 2 and the stiffness of the bituminous-treated base (in terms of resilient modulus).…”

Section: Structural Design Methodologymentioning

confidence: 99%

“…Zhang ( 28 ) tested a typical Wisconsin open-graded aggregate commonly used for drainage layers. Resilient modulus tests were performed at 15% and 20% air voids.…”

Section: Structural Design Methodologymentioning

confidence: 99%

“…ATPB. Zhang and colleagues (28) reported ATPB stiffness values ranging from 400 to 2000 MPa (58-290 ksi), and concluded, "The stiffness of conventional asphalt concrete can be 5.5-7 times larger than the stiffness of ATPB even in a dry state." As shown in Table 2, agencies have reported a wide variation in the structural coefficient (a 2 ) used to represent ATPB.…”

Section: Porous Asphalt Mixtures Typically Feature a Relativelymentioning

confidence: 99%

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Development of Structural Design Guidelines for Porous Asphalt Pavement

Hall

Schwartz

2018

Transportation Research Record: Journal of the Transportation R

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Porous asphalt pavements allow designers to introduce more sustainability into projects and lessen their environmental impact. Current design procedures are based primarily on hydrologic considerations; comparatively little attention has been paid to their structural design aspects. As their use grows, a design procedure and representative material structural properties are needed to ensure that porous pavements do not deteriorate excessively under traffic loads. The objective of this project was to develop a simple, easy to apply design procedure for the structural design of porous asphalt pavements. Two methodologies were considered for such a structural design procedure: ( a) the 1993 AASHTO Pavement Design Guide empirical approach, and ( b) the mechanistic–empirical approach employed by the AASHTOWare Pavement ME Design software. A multifactor evaluation indicated the empirical 1993 AASHTO design procedure to be the most appropriate platform at this time. It is noted, however, that both design procedures lack validation of porous asphalt pavements against field performance. AASHTO design parameters and associated material characteristics are recommended, based on an extensive literature review. For “thin” open-graded base structures (12 in. or less), the AASHTO procedure is performed as published in the 1993 Guide. For “thick” base structures (>12 in.), the base/subgrade combination is considered a composite system which supports the porous asphalt layer; an equivalent deflection-based approach is described to estimate the composite resilient modulus of the foundation system, prior to applying the 1993 AASHTO design procedure.

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Section: Structural Design Methodologymentioning

confidence: 99%

“…Zhang ( 28 ) tested a typical Wisconsin open-graded aggregate commonly used for drainage layers. Resilient modulus tests were performed at 15% and 20% air voids.…”

Section: Structural Design Methodologymentioning

confidence: 99%

Section: Porous Asphalt Mixtures Typically Feature a Relativelymentioning

confidence: 99%

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