Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A study of the UGR allows to improve techniques of cold-asphalting

22.08.2006
Bitumen is used in traditional asphalting, a sub-product that remains after successive oil refining, and dry goods, stones that confer stiffness on roads. Bitumen acts as adhesive but, as it is a very viscous material, it has to be heated to be used. Since some years ago, big technological innovations have been introduced to carry out the cold process, using the so-called bituminous emulsions, heterogeneous systems composed of two stages or elements, insoluble of each other, usually bitumen and water.

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.

Burst time

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.

Daily colloids

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
Further information:
http://prensa.ugr.es/prensa/research/index.php

More articles from Studies and Analyses:

nachricht Smart Data Transformation – Surfing the Big Wave
02.12.2016 | Fraunhofer-Institut für Angewandte Informationstechnik FIT

nachricht Climate change could outpace EPA Lake Champlain protections
18.11.2016 | University of Vermont

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>