Dynamic Modulus and Fatigue Testing of Lightly Cementitiously Stabilized Granular Pavement Materials


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by Piratheepan Jegatheesan, School of Aerospace, Civil and Mechanical Engineering (ACME), University of New south Wales at Australian Defence Force Academy, Canberra, ACT2600, AUSTRALIA, j.piratheepan@adfa.edu.au,
C. T. Gnanendran, School of Aerospace, Civil and Mechanical Engineering (ACME), University of New south Wales at Australian Defence Force Academy, Canberra, ACT2600, AUSTRALIA, r.gnanendran@adfa.edu.au,



Document Type: Proceeding Paper

Part of: Airfield and Highway Pavements: Efficient Pavements Supporting Transportation's Future

Abstract: This paper examines the characterization of a granular material lightly stabilized with slag-lime cementitious binder particularly utilizing the monotonic and cyclic load IDT testing method. An extensive laboratory investigation was carried out to determine the mechanical properties of the lightly stabilized granular material and to establish fatigue life relationships by IDT testing and typical results obtained from this ongoing research are presented in this paper. This study shows that the static stiffness modulus and dynamic stiffness modulus of the stabilized material increases with binder content and showed little change with moisture content variation around the optimum moisture content. Fatigue life relationships were established using two methods, namely the approach of determining the number of cycles for 50% reduction in the stiffness compared to the initial stiffness and the energy ratio method, and they both showed similar linear relationships. It is therefore concluded that cyclic load IDT testing can be used reliably to characterize lightly stabilized granular materials with slag-lime in terms of their strength, stiffness modulus and fatigue life relationships.

Subject Headings: Granular materials | Fatigue tests | Material tests | Concrete pavements | Dynamic modulus | Construction materials | Stiffening | Load tests | Lifeline systems | Fatigue life |

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