Papers

@article{orosa_stresstemperature_2023,

title = {A stress–temperature superposition approach to study the nonlinear resilient behavior of cold recycled mixtures (CRM) with active filler addition},

author = {Pablo Orosa-Iglesias and Ignacio Pérez-Pérez and Ana M. Rodríguez-Pasandín and John E. Haddock},

url = {https://www.sciencedirect.com/science/article/pii/S0950061823011522},

doi = {10.1016/j.conbuildmat.2023.131439},

issn = {0950-0618},

year  = {2023},

date = {2023-06-01},

urldate = {2026-08-13},

journal = {Construction and Building Materials},

volume = {384},

pages = {131439},

abstract = {The asphalt paving sector is currently embracing and enhancing cold mixture technologies to reduce carbon emissions and decarbonize its operations. Cold recycled mixtures (CRM) have proven to be a promising alternative in road construction and rehabilitation, becoming a primary research focus. This study evaluates the effects on compactability and volumetric properties of adding 1% Portland cement or 1% hydrated lime to CRM made with 100% reclaimed asphalt pavement and bitumen emulsion. Dynamic triaxial tests with different confinement pressures (ranging from 20 to 200 kPa) and temperatures (5, 15, 25, and 35 °C) were used to determine the influence of these active filler additions on the resilient modulus (Mr) of the mixtures. All the mixtures exhibited increased Mr values at lower temperatures and reduced stress–dependency. Cement addition had the most favorable effect on compactability, reducing the necessary compaction energy, while mixtures with hydrated lime had more substantial increases in Mr and reduced stress dependencies. Finally, the results were analyzed by plotting master curves using a proposed novel approach called Stress–Temperature Superposition Principle (STSP), which allows for simpler and more straightforward analyses.},

keywords = {Active filler, Bitumen emulsion, Cold recycling mix, Reclaimed asphalt pavement, resilient modulus, Triaxial testing},

pubstate = {published},

tppubtype = {article}

}

@article{orosa_evaluation_2022,

title = {Evaluation of the shear and permanent deformation properties of cold in-place recycled mixtures with bitumen emulsion using triaxial tests},

author = {Pablo Orosa-Iglesias and Ignacio Pérez-Pérez and Ana M. Rodríguez-Pasandín},

url = {https://www.sciencedirect.com/science/article/pii/S0950061822007371},

doi = {10.1016/j.conbuildmat.2022.127054},

issn = {0950-0618},

year  = {2022},

date = {2022-04-01},

urldate = {2026-08-11},

journal = {Construction and Building Materials},

volume = {328},

pages = {127054},

abstract = {The cold in-place recycling (CIR) technique is a road rehabilitation method suitable for a circular economy. Triaxial tests have proven to be suitable for studying the mechanical behaviour of cold mixtures. In this study, CIR specimens were prepared using a gyratory compactor with different proportions of bitumen emulsion. The Mohr–Coulomb diagrams and shear parameters were obtained by conducting monotonic triaxial tests at different confining pressures. The binder content provided adequate cohesion; however, an excess of binder reduced internal friction. Subsequently, repeated load permanent deformation triaxial tests were performed. Accordingly, critical stress ratios between 20% and 30% were obtained, and the mix with a 2.50% binder exhibited the best response. Lastly, two permanent deformation prediction models were fitted to the measured results. For high deformations, the Paute model underestimated the deformations, whereas the Huurman model demonstrated the best fit.},

keywords = {Bitumen emulsion, Bitumen stabilized material, Cold in-place recycling, Gyratory compactor, permanent deformation, Prediction model, Reclaimed asphalt pavement, Rutting, Shear properties, Triaxial testing},

pubstate = {published},

tppubtype = {article}

}