Week 1: Outline of the course; Introduction to bituminous pavements; Overview of distresses such as rutting and fatigue cracking in bituminous layers; Influence of binders and mixtures on such distresses; Role of mechanical characterization for design and laboratory performance.
Week 2:Introduction to linear viscoelasticity; Elastic, viscous and viscoelastic response; Viscoelastic solid and viscoelastic fluid; Linearity of response - scaling and superposition;
Week 3:Introduction of material functions for viscoelastic materials - creep compliance function and, stress relaxation function in the time domain and complex creep compliance and complex stress relaxation function in the frequency domain.
Week 4:Influence of temperature on the linear viscoelastic response; Thermorheologically simple behavior, time-temperature superposition, and construction of master curve.
Week 5:Introduction to refinery processing of bitumen; Chemical composition of bitumen; Relationship between chemical composition and physical parameters of bitumen; Aging of bitumen and bituminous mixtures.
Week 6:Introduction to the grading system for bitumen; Penetration and viscosity grading of bitumen
Week 7:Industry lecture on Dynamic Shear Rheometer - Dharmesh Gala from Anton Paar; Performance grading of bitumen - Issues related to reliability, slow-moving traffic, and high volume and grade-bumping.
Week 8:Modifiers for bitumen; Performance characterization of modified bitumen; Introduction to MSCR test method.
Week 9:Introduction to Bituminous Mixture and the associated volumetrics; Mixing and compaction of unmodified and modified bituminous mixtures
Week 10:Stiffness modulus (van der Poel), dynamic modulus, and resilient modulus of bituminous mixtures - experimental protocol, and post-processing.
Week 11:Simulation of rutting of bituminous mixtures in the laboratory: flow number, flow time and dry rut wheel testing - experimental protocol, and post-processing.
Week 12:Simulation of fatigue damage of bituminous mixtures in the laboratory: beam bending and repeated indirect tensile testing - experimental protocol, and post-processing.
BOOKS AND REFERENCES
1. Alan S Wineman and K. R. Rajagopal, Mechanical Response of Polymers, Cambridge University Press, 2000.
2.W. N. Findley, J. S. Lai and K. Onaran, Creep and Relaxation of Nonlinear Viscoelastic Materials, Dover Publications, 1989.
3.The Asphalt Handbook, Asphalt Institute, 1989.
4. Relevant ASTM and IS Standards as well as downloadable public documents. Permanent links will be shared during the conduct of the course.