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Stiffness modulus is the ratio between stress and strain found in a layer. The value of the stiffness modulus is related to the performance of the layer in bearing the load. High modulus of stiffness makes the asphalt mixture stiff and resistant to deformation, while a decrease in the modulus of stiffness will make the pavement layer vulnerable to crack. The purpose of this study was to analysis the characteristic differences between damar asphalt mixture and conventional asphalt mixture in term of the stiffness of asphalt mixtures due to the variations in vehicle speed at the specified temperature. Speed variations are 10, 20, 30, 40, 50 and 60 kph and the temperature reference are 20 and 40°C. Data analysis is performed by comparing the stiffness values of damar asphalt mixtures and conventional asphalt mixture. The results of this study indicate that damar asphalt mixes are more resistant to changes in temperature and vehicle speed than conventional asphalt.

The effect of vehicle speed on the stiffness modulus of conventional asphalt and bioasphalt