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The mechanical behaviour of emulsified cold recycled mixtures (ECRM) is intricate due to the influence of the response of individual constituents and the proportion of constituents. The objective of the current study is to investigate the viscoelastic response of two ECRM mixtures prepared using two different production processes. The first one is a conventional ECRM with 100 % reclaimed asphalt pavement (RAP) material, and the second one is a modified ECRM with 75 % RAP and an attempt is made to activate the RAP material. Mechanical properties are investigated based on repeated haversine compression tests over a wide range of temperatures and frequencies in confined and unconfined conditions. In order to generate the master curve, the reference temperature is identified using the characteristic relaxation time assuming Arrhenius relation to hold. The generalised Sigmoidal and Huet-Sayegh models are used to construct the master curve. The dynamic modulus master curve shows an increase in the stiffness of the material due to confinement pressure at lower reduced frequencies. Further, the continuous relaxation spectra (CRS) are generated from the master curve data, and the shape characteristics are studied. The distinct response between the mixtures can be seen in terms of the peak of the spectra at lower relaxation times. It is seen that the skewed logistic distribution is able to capture the relaxation behaviour of both mixtures.

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