VI. RESEARCH WORK DONE IN ACADEMIC INSTITUTIONS RELATED TO THESIS WORK

B. PAVEMENT ENGINEERING AND PAVING MATERIALS
5. Constitutive Modeling of Pavement Materials
Date of Start

January 2005
Indian Institute of Technology Madras (R, C)

 

Scope and Objectives

To develop models that predict the behavior of pavement materials.
• To characterize the behavior of materials used in pavement constructions.
• Carryout experiments on granular material similar to the one used in Wet Mix Macadam, analyze the results and create a model for it.

 
Methodology
It involves the measurement of deformation to loading conditions and analysis of the response. The experimental procedure based on the protocol developed by the State Highway Research Program (SHRP) for Long Term Pavement Performance (LTPP). The testing process is adopted similar to this protocol 46, “Resilient Modulus of unbound granular base/subbase material and subgrade soils. It is based on AASHTO T 292 – 91I, Resilient Modulus of subgrade soils and untreated Base/Subbase.

Experimental Description
The experiment is to be done on a triaxial loading setup. The sample size of 70 mm diameter and 140 mm height is to be used. The loading cycle consists of 1 second loading and 0.9 second rest period with a haversine loading form. The stress conditions applied are, in fact, those which occur when an isolated wheel load is applied to the pavement directly above the element of material, is simulated in the test.