Researchers of the group ‘Physics of fluids and biocolloids’ of the University of Granada [http://www.ugr.es], have worked with a system in which bitumen emulsifies at room temperature through a tensioactive or soap, forming small drops that make the system more fluid, which facilitates transport and allows cold application. “As we do not need to heat bitumen we save energy, reduce environmental pollution and improve work conditions”, explains Roque Hidalgo, Professor of Physics and one of the researchers who have taken part in the project.
The study contributed a better control of the aggregation state of the system to the industrial experience with cold bituminous emulsions. This is a key point in the process: to be useful, it is necessary to control in which circumstances the emulsion will be stable, making possible to transport it and work with it, and under which circumstances it will stop being stable. It only should happen when it is mixed with dry goods, a moment in which the emulsion “breaks” and bitumen and the soapy substance separate, allowing the first to act as adhesive of the solids.
The break stage of the emulsion is essential for the quality of asphalt. The researchers of the UGR [http://www.ugr.es] have developed a technology that allows to measure and control how long the process is, and they have tested it in almost real conditions using several types of emulsions and bitumen. The system has been developed through an agreement with Repsol YPF that finished in 2004. This collaboration has remained for seven years, “an exceptional situation when it is about agreements with the industry”, says Hidalgo.
The research group he works with, founded by him in the in the eighties, gathers a wide experience in projects which can be implemented in business world, and for this reason it was awarded the First Prize of the Social Council of the University of Granada. “Our group carries out research works with industrial implementation and, occasionally, it counts on the support of companies to carry them out”, says the UGR Professor. The researcher in charge of the project was the Professor of Physics Miguel Cabrerizo.
One of its most tested research lines, which has generated collaborations with other companies, is the Physics of Colloids. Colloid means “glue”, adhesive, and the field of study comprises the systems in which there are two phases or elements; for example, a solid –sized between a micron and a nanometre-, and a liquid. The implementations Colloidal Physics seem to be inexhaustible: for example milk is a colloid; and so are paints, blood, adhesives, soft drinks, …
Its application in the field of asphalts contextualizes in construction sector, which is the main motor of the economy of the country. According to the Spanish Road Association, during the nineties public administration invested €30 billion in the construction or improvement of the roads. An example: Spain was in that period the country of the EU where more motorway kilometres were built - 3,600 -. Andalusia was the autonomous region which received more state funding - €2.756 billion -, and the second in local investment - €1.743 billion -.
Antonio Marín Ruiz | alfa
Innovative genetic tests for children with developmental disorders and epilepsy
11.07.2018 | Christian-Albrechts-Universität zu Kiel
Oxygen loss in the coastal Baltic Sea is “unprecedentedly severe”
05.07.2018 | European Geosciences Union
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
13.07.2018 | Event News
13.07.2018 | Materials Sciences
13.07.2018 | Life Sciences