Papers

@article{pasandin_preliminary_2025,

title = {Preliminary Characterization of Lignin-Modified Binder for Half-Warm-Mix Asphalt},

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

url = {https://www.mdpi.com/2073-4360/17/8/1019},

doi = {10.3390/polym17081019},

issn = {2073-4360},

year  = {2025},

date = {2025-01-01},

urldate = {2025-01-01},

journal = {Polymers},

volume = {17},

number = {8},

pages = {1019},

publisher = {Multidisciplinary Digital Publishing Institute},

abstract = {There is a growing trend to promote circular economy practices and reduce petroleum-derived product consumption in the paving sector. In this context, a liquid lignin-rich industrial waste was incorporated at 0% (control), 5%, 10%, 15%, and 20% into a bitumen emulsion to manufacture a lignin-based biobinder for half-warm-mix asphalt (HWMA). The mix of the bitumen emulsion and the industrial waste was made using an Ultra-turrax device, with the final mixing temperature monitored using a thermographic camera. Microstructure analysis was conducted using scanning electron microscopy (SEM). The bitumen was extracted and characterized using needle penetration tests at several temperatures. Additionally, the ring-and-ball softening point, penetration index, and ductility were assessed. Incorporating up to 5% of lignin-rich industrial waste led to a lignin-based biobinder that could be used for a more sustainable and bitumen-efficient HWMA production.},

keywords = {biobinder, half-warm-mix asphalt, lignin, microstructure, Rheology},

pubstate = {published},

tppubtype = {article}

}

@article{pasandin_valorisation_2022,

title = {Valorisation of lignin-rich industrial byproduct into half-warm mix reclaimed asphalt with enhanced performance},

author = {Ana M. Rodríguez-Pasandín and E. Nardi and N. Pérez-Barge and E. Toraldo},

url = {https://www.sciencedirect.com/science/article/pii/S0950061821035030},

doi = {10.1016/j.conbuildmat.2021.125770},

issn = {0950-0618},

year  = {2022},

date = {2022-01-01},

urldate = {2026-08-11},

journal = {Construction and Building Materials},

volume = {315},

pages = {125770},

abstract = {To promote a circular economy and sustainable development, the possibility of using a lignin-rich industrial byproduct as a partial substitute for asphalt emulsions in road pavements is analysed. A half-warm mix reclaimed asphalt (HWMRA)-type AC 16 surf S, manufactured with 100% reclaimed asphalt pavement, is selected. Substitution percentages of 0% (control mixture), 5%, 10%, 15%, and 20% are employed. The microstructure of the blend of the byproduct and asphalt emulsion is observed using scanning electron microscopy. The water resistance of the mixture is investigated using indirect tensile tests, as well as its volumetric properties. The stiffness, thermal susceptibility by indirect tensile tests, and resistance to permanent deformation by confined uniaxial compression tests and Hamburg wheel tracking tests are also studied. The optimum percentage of byproduct substitution is 5%, resulting in an enhanced HWMRA with a slightly better water resistance, higher resistance to permanent deformation at low and medium environmental temperatures, and higher indirect tensile strength and stiffness than those of the control mix.},

keywords = {Byproduct, HWMRA, lignin, permanent deformation, RAP, SEM, Stiffness, Water resistance},

pubstate = {published},

tppubtype = {article}

}

@article{perez_feasibility_2020,

title = {Feasibility of Using a Lignin-Containing Waste in Asphalt Binders},

author = {Ignacio Pérez-Pérez and Ana M. Rodríguez-Pasandín and Jorge C. Pais and Paulo A. A. Pereira},

url = {https://doi.org/10.1007/s12649-019-00590-4},

doi = {10.1007/s12649-019-00590-4},

issn = {1877-265X},

year  = {2020},

date = {2020-06-01},

urldate = {2026-08-05},

journal = {Waste and Biomass Valorization},

volume = {11},

number = {6},

pages = {3021–3034},

abstract = {A lot of water waste streams are produced during the production of hardboard panels. This paper analyses the feasibility of using a lignin-containing waste from the hardboard industry in asphalt binders. It would contribute to both waste reduction and decrease of the consumption of asphalt in order to obtain environmental, economic and social benefits. The waste from the hardboard industry was not subjected to any transformation i.e. it was blended directly with the conventional asphalt. Asphalt binder samples blended with 0, 5, 10, 20 and 40% of the waste were aged in a rolling thin-film oven apparatus. Basic characterisation (penetration grade, ring and ball softening point and resilience) as well as advanced characterisation (dynamic viscosity, shear complex modulus and phase angle) were performed. Asphalt binders blended with up to 20% waste can be stored, pumped and handled at hot-mix asphalt facilities. Addition of the waste to asphalt binder increases the viscosity and the shear complex modulus and reduces the phase angle. The waste produces asphalt binders with higher storage modulus and lower loss tangent. The waste enhances fatigue and rutting resistance. Asphalt binder with 20% of waste displays the best potential for use as an extender and as well as an enhancer in asphalt pavements. The research results can offer technical support to value this waste from hardboard production, without the need for subsequent transformations.},

keywords = {Asphalt, Binder, Hardboard, lignin, Pavement, Waste},

pubstate = {published},

tppubtype = {article}

}

@article{perez_use_2019,

title = {Use of lignin biopolymer from industrial waste as bitumen extender for asphalt mixtures},

author = {Ignacio Pérez-Pérez and Ana M. Rodríguez-Pasandín and Jorge Carvalho Pais and Paulo Antonio Alves Pereira},

url = {https://www.sciencedirect.com/science/article/pii/S0959652619304676},

doi = {10.1016/j.jclepro.2019.02.082},

issn = {0959-6526},

year  = {2019},

date = {2019-05-01},

urldate = {2026-08-05},

journal = {Journal of Cleaner Production},

volume = {220},

pages = {87–98},

abstract = {Liquid waste containing lignin, a biopolymer of vegetable origin, is generated from the production of wood hardboards. Because polymers improve the performance of asphalt mixtures, this work studies the possibility of using this industrial waste as a bitumen extender in the production of asphalt mixtures. Thus, asphalt mixtures with 0% (control), 5%, 10%, 20%, and 40% of industrial waste were produced. The bitumen–aggregate adhesion, moisture damage resistance, resilient modulus, permanent deformation resistance, and thermal susceptibility of such mixtures were analysed. Asphalt mixtures with 20% of industrial waste showed the best moisture damage resistance. As the percentage of industrial waste increased, the thermal susceptibility of the mixture also increased. In this regard, at 5 °C, the resilient modulus of the mixture made with 20% of industrial waste was 19.08% lower than that of the control mixture. Moreover, at 30 °C, the resilient modulus of the mixture made with 20% of industrial waste was 10.48% higher than that of the control mixture. Therefore, it can be stated that it is appropriate to use this industrial waste containing lignin as a bitumen extender. It can be used in asphalt mixtures for road pavement, mainly by substituting 20% of the bitumen by this liquid waste. It reduces the consumption of bitumen and improves the performance of asphalt mixtures, contributing to the purpose of sustainable construction. The industrial waste was not subjected to any transformation process, thus facilitating its use. The reduction in the use of bitumen in asphalt mixtures by adding this industrial waste contributes to the goals of sustainable development and cleaner production of asphalt mixtures.},

keywords = {Asphalt mixture, Biopolymer, Bitumen extender, Industrial Waste, lignin},

pubstate = {published},

tppubtype = {article}

}