Material Properties in Paving
The rheological aspects of asphalt materials, distinguishing between thermo-plastic, elastic, and viscous properties. Learn about stress-strain relationships, time dependency, and the characteristics of different materials under various conditions.
Uploaded on Apr 19, 2025 | 0 Views
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Presentation Transcript
Paving Asphalt Material:- Lecture No. 5 ) ( a) Rheological Parts;-stress-strain relationship is time dependent. (Asphalt) b) Thermo plastic:-consistency various with temperature. Under Stress : -
Elastic Materials:- : - Stress-strain is time independent ( ) Immediate strain and removing with no permanent deformation . Follows Hooke's law Constant of Proportional based on the type of load applied Tension ( Modulus of Elasticity , Young Modulus ) E = Compression ( Bulk Modulus , Modulus of Compressibility ) K= Shear ( Shear Modulus , Modulus of Rigidity ) G G Str es s 0 Loading time T=0 T=TL Time Non-linear St re ss 0 linear G strain
Viscous Materials; : - a) Stress-strain is time dependent b) No immediate strain or recovering and with permanent deformation : - T=0 d) Represent by Dashpot c) Follows Newtonians law . Str es s 0 Loading time T=0 T=TL Time Dilatant St re ss 0 linear Pesdoplastic strain
