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Browsing by Author "Partal López, Pedro"
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Bitumen chemical modification by thiourea dioxide
Cuadri Vega, Antonio Abad
; Partal López, Pedro; Navarro Domínguez, Francisco Javier; García Morales, Moisés; Gallegos Montes, Críspulo (Elsevier, 2011)
This work evaluates a novel bitumen modification through the use of a chemical agent, thiourea dioxide, substance which has been traditionally used as a reducing agent. Thermogravimetric analysis demonstrated the formation ... -
Chemically modified bitumens with enhanced rheology and adhesion properties to siliceous aggregates
Cuadri Vega, Antonio Abad; Partal López, Pedro; Ahmad, Naveed; Grenfell, James; Airey, Gordon (Elsevier, 2015)
Moisture damage is one of the major premature failures that worsens the performance and shortens service life of pavements. This research assesses the effect that two chemical modifiers (thiourea and an isocyanate-functionalized ... -
Desarrollo de bioplásticos a partir de subproductos agroalimentarios con aplicaciones en envases y matrices de difusión
Gómez Martínez, Diana Patricia (Universidad de Huelva, 2013)
El término bioplástico hace referencia a los plásticos que se obtienen de materias primas renovables o a los que simplemente son biodegradables. De mayor interés son los obtenidos a partir de mezclas de biopolímero y ... -
The development of polyurethane modified bitumen emulsions for cold mix applications
Carrera Páez, Virginia; Cuadri Vega, Antonio Abad; García Morales, Moisés; Partal López, Pedro (Springer Verlag, 2015)
Bitumen emulsions stand for an alternative paving practice to the traditional hot-mix asphalts. In addition, modified bitumen emulsions show a better performance than unmodified ones. This work studies the feasibility of ... -
Effect of transesterification degree and post-treatment on the in-service performance of NCO-functionalized vegetable oil bituminous products
Cuadri Vega, Antonio Abad; García Morales, Moisés; Navarro Domínguez, Francisco Javier; Partal López, Pedro (Elsevier, 2014)
The bitumen modification through polyurethane prepolymers presents significant benefits for the manufacture of bituminous products for the paving industry. In this sense, this work explores the use, as bitumen modifier, ... -
Emulsiones alimentarias aceite-en-agua estabilizadas con proteínas de atún
Ruiz Márquez, Dolores; Partal López, Pedro; Franco Gómez, José María; Gallegos Montes, Críspulo (Consejo Superior de Investigaciones Científicas; Instituto de la Grasa y sus Derivados, 2010)
El presente trabajo se ha centrado en el desarrollo de emulsiones alimentarias aceite-en-agua estabilizadas con proteínas de atún. Específicamente, se ha analizado la influencia del método de conservación de las proteínas ... -
End-performance evaluation of thiourea-modified bituminous binders through viscous flow and linear viscoelasticy testing
Cuadri Vega, Antonio Abad; García Morales, Moisés; Navarro Domínguez, Francisco Javier; Airey, Gordon; Partal López, Pedro (Spinger Verlag, 2013)
Straight-run bitumens are no longer suitable in new asphalt mixtures. Consequently, the use of modified bitumens has become more important. In order to both improve binders mechanical properties and prevent it from phase ... -
Enhancing the viscoelastic properties of bituminous binders via thiourea-modification
Cuadri Vega, Antonio Abad; García Morales, Moisés; Navarro Domínguez, Francisco Javier; Partal López, Pedro (Elsevier, 2012)
Although added in a very low concentration, bitumen controls the final properties and performance of the resulting asphalt mixture. As an alternative to classic bitumen modification with polymers, we herein propose the use ... -
Hybrid Rubberised Bitumen from Reactive and Non-Reactive Ethylene Copolymers
Senise, Simona; Carrera Páez, Virginia; Cuadri Vega, Antonio Abad; Navarro Domínguez, Francisco Javier; Partal López, Pedro (MDPI, 2019-11)
Hybrid modification is a relatively new concept of incorporating two or more polymeric modifiers of different nature to a bitumen, in order to take advantage of their complementary features. Aiming to this, in this paper, ... -
Influence of polymer melting point and melt flow index on the performance of ethylene-vinyl-acetate modified bitumen for reduced-temperature application
Yuliestyan, Avido; Cuadri Vega, Antonio Abad; García Morales, Moisés; Partal López, Pedro (Elsevier, 2016)
The paving industry is currently demanding polymer modified bitumens (PMBs) with enhanced in-service performance and low enough viscosity at lower application temperatures. With this aim, this study focuses on the use of ... -
Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
Carrera Páez, Virginia; Cuadri Vega, Antonio Abad; García Morales, Moisés; Partal López, Pedro (Elsevier, 2014)
Isocyanate-based modification is lately gaining acceptance as a successful way to give added value to bitumen, a crude oil refining by-product. In order to study the influence of prepolymer type on the rheological properties ... -
Influencia del pH y de la fuerza iónica sobre la gelificación térmica de proteínas de la yema de huevo
Partal López, Pedro; Guerrero Conejo, Antonio F.; Cordobés Carmona, Felipe; Carmona Gallego, José Antonio; Martinez García, Inmaculada (Consejo Superior de Investigaciones Científicas, CSIC: Instituto de la Grasa, 2007-09)
En este trabajo se estudiaron las transiciones térmicas de la yema de huevo usando técnicas de calorimetría diferencial de barrido (DSC) y ensayos viscoelásticos lineales, más concretamente, ensayos de cizalla oscilatoria ... -
Isocyanate-functionalized castor oil as a novel bitumen modifier
Cuadri Vega, Antonio Abad; García Morales, Moisés; Navarro Domínguez, Francisco Javier; Partal López, Pedro (Elsevier, 2013)
The use of biomaterials from renewable sources in the synthesis of polyurethane-derived polymers is lately receiving great attention from social, environmental and economic standpoints. In this work, prepolymers having ... -
Modificación reactiva de betunes con prepolímeros basados en isocianato
(Universidad de Huelva, 2014)Los materiales bituminosos presentan una serie de propiedades, tales como ductilidad, adhesividad, resistencia al efecto de los factores ambientales y químicos, etc. Estas características permiten su utilización en el ... -
New Bitumens Obtained from Physical Distillation of a Conventional Bitumen Mixed with EVA Copolymer
Goikoetxeaundia, Goretti; Mateos, Alexander; Muñoz, María Eugenia; Santamaría, Anton; Martinez García, Inmaculada; Partal López, Pedro (Bentham Science Publishers, 2008)
Bitumen phases separated from 5% and 12% EVA/bitumen blends are investigated. Basic characterization is carried out using a peculiar thin layer chromatographer, the Iatroscan. The rheological and technical analysis lead ... -
Physico-chemical modification of asphalt bitumens by reactive agents
Cuadri Vega, Antonio Abad (Universidad de Huelva, 2013)
Bitumen, a by-product from crude oil distillation, has long been used in numerous engineering applications that range from the construction of road pavements to waterproof membranes for the roofing industry. On account of ... -
Processing of bitumens modified by a bio-oil-derived polyurethane
Cuadri Vega, Antonio Abad; García Morales, Moisés; Navarro Domínguez, Francisco Javier; Partal López, Pedro (Elsevier, 2014)
Castor oil (CO) functionalized by isocyanate groups (–NCO) is proposed as a novel bio-based reactive polyurethane (PU) for bitumen modification. This work presents a comparative analysis conducted on blends of bitumen and ... -
Reología de derivados de la yema de huevo deshidratada
Partal López, Pedro; Miranda Pizarro, Juan; Guerrero Conejo, Antonio F. (Consejo Superior de Investigaciones Científicas, CSIC: Instituto de la Grasa, 2000-08)
Tanto el proceso de emulsificación como las propiedades Teológicas y la estabilidad de una emulsión alimentarla, tipo mayonesa, dependen en gran medida de la microestructura y la reología de la fase continua acuosa, cuyo ... -
Rheological behaviour of polymer-modified bituminous mastics : a comparative analysis between physical and chemical modification
Shivokhin, Maxim; García Morales, Moisés; Partal López, Pedro; Cuadri Vega, Antonio Abad; Gallegos Montes, Críspulo (Elsevier, 2012)
Mastic, a bitumen/filler blend which naturally forms when bitumen is mixed with aggregates is the actual product used to bind coarse mineral particles in the asphalt mixtures. As a result, the characterisation of mastics ... -
Short- and Long-Term Epoxy Modification of Bitumen: Modification Kinetics, Rheological Properties, and Microstructure
Cuadri Vega, Antonio Abad; Delgado Sánchez, Clara; Navarro Domínguez, Francisco Javier; Partal López, Pedro (MDPI, 2020-02)
Aiming to gain knowledge in the epoxy-bitumen modification mechanisms, this work explores the e ects that epoxy concentration and ambient curing exert on the physico-chemistry and thermo-rheological properties of ...
