Characterizing the Bituminous Material by Using Graphical Techniques

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Abstract: Material that makes bound with bitumen known as bituminous material. For determination of properties of bituminous material various field test and techniques are used which are time consuming and have expensive material cost. To avoid such problems, techniques are required which can provide basic input parameters for materials models to be used in MEPDG Level-I pavement design input. The properties of bitumen can be fully described by using both the complex modulus and phase angles. Black Space diagram determines the viscosity, Stiffness, and elasticity by using complex modulus and phase angle and the G* and δ linked to Glover-Rowe concept which defines the two damaging zones that are damage onset and significant cracking. Cole-Cole plot shows the viscous and elastic behaviour of bitumen. Two bitumen grade 40-50 and 60-70 penetration grade and PMB (modified 60-70 with 1.6% elvaloy) were studied at six temperatures of 18, 24,30,36,42 and 48oC and in a frequency range of 0.01Hz to 100Hz using a DSR (dynamic shear rheometer). Keywords: Bitumen rheology, Black Space Diagram, Cole-Cole Plot, Glover Rowe Parameter, Block Cracking

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