Pavement layer interface shear strength using a hyperbolic mohr-coulomb model and finite element analysis

Hasan Ozer, Imad L. Al-Qadi, Khaled I. Hasiba, Hao Wang, Alejandro Salinas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

This paper presents a laboratory and numerical evaluation of interface shear strength between two hot-mix asphalt (HMA) layers. Pavement layer interface shear strength is discussed using a frictional Mohr-Coulomb-based plasticity model. The interfacial response was captured at two different loading states: pure shear and shear with compression. Direct shear testing was performed at the interface between two HMA layers to determine the effectiveness of two tack coat materials: SS-1hp and SS-1vh. Two overlays (9.5 mm and 4.75 mm nominal maximum aggregate size [NMAS]) were applied over unmilled aged nontrafficked surface. The interface shear tests were conducted at various normal pressure levels (0, 0.138, and 0.276 MPa; 0, 20, and 40 psi, respectively) at room temperature (25 C [77 F]). The measured interface shear stresses were compared with those predicted from vehicular loading in a typical thick pavement structure. A three-dimensional (3D) finite element (FE) pavement model was built to evaluate the interfacial stresses at the interface between HMA layers under moving vehicular loading. According to the results obtained from the experimental program, several parameters were found to be influential on the interlayer response. These are vehicle loading (load and tire inflation pressure) and maneuvering (braking, acceleration, and cornering). The paper also introduces the stress ratio concept for evaluating critical interface conditions. The stress ratio can be calculated based on the ratio of predicted interface stresses and interface shear strength.

Original languageEnglish (US)
Title of host publicationAirfield and Highway Pavement 2013
Subtitle of host publicationSustainable and Efficient Pavements - Proceedings of the 2013 Airfield and Highway Pavement Conference
Pages1445-1456
Number of pages12
DOIs
StatePublished - 2013
Externally publishedYes
Event2013 Airfield and Highway Pavement Conference: Sustainable and Efficient Pavements - Los Angeles, CA, United States
Duration: Jun 9 2013Jun 12 2013

Publication series

NameAirfield and Highway Pavement 2013: Sustainable and Efficient Pavements - Proceedings of the 2013 Airfield and Highway Pavement Conference

Other

Other2013 Airfield and Highway Pavement Conference: Sustainable and Efficient Pavements
CountryUnited States
CityLos Angeles, CA
Period6/9/136/12/13

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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