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Testing, design and applications

Time: 12pm-1pm

Reinforcement of asphalt with use of geosynthetics is still a global application where practice is ahead of science. Different types of geogrids and geocomposites, composed from geogrids and non-woven geotextiles, have been increasingly used in the maintenance works of asphalt overlaying the existing pavements for a long time now. More often, they have been used in the two main applications, which are (1) an enhancement of soft soil bearing capacity within the structure of new pavements or (2) reflective cracking control in asphalt overlays constructed over existing pavements. However, to this day a proper evaluation of influence of these materials on pavement fatigue life is still challenging task.

The topic of the presentation will be the use of Asphalt Interlayers, especially geocomposites in asphalt overlay to prevent cracking and to extend the pavement life eventually. The main attention will be paid on the aspect of fatigue and reflective cracking (bottom-up) within the application of the two main type of the products, which are structural polymer monolithic and also glassfiber geocomposites and their benefits toward the pavement life extension.

The use of gecomposite incorporating multiaxial geogrid and non-woven fabric of high bitumen retention results in an increase of life of the designed asphalt overlay and an entire pavement eventually. This has been proven by both the extensive research programme and on site applications. Such an approach can offer an opportunity to increase the fatigue life (higher traffic capacity) without the need to increase asphalt overlay thickness or to reduce the thickness of asphalt overlay without reduction of pavement life, or to combine somehow both options. This concept assumes the influence of geocomposites in computing pavement life, thus enables delivering cost-efficient and environmentally friendly designs. There will be presented something about a slightly modified concept of the Mechanistic-Empirical pavement design method based on fatigue improving factors derived from the laboratory test investigation, allowing reinforcement benefits to be implemented into the design process.

Finally, an example(s) of an application of the reconstructed asphalt pavement with the enhancement of the asphalt overlay reinforced by the geocomposite will be also presented.

Presenter

Michal Golos – Civil Engineer with over 25 years of experience.

Michal is a Civil Engineer with a M. Sc. degree in Highway Engineering from Faculty of Civil Engineering of University of Technology in Gdansk, Poland. He also holds a post-graduate degree in Management from Faculty of Management of University of Gdansk, Poland. Michal has worked for Drotest Road Engineering Office, a partner of Tensar Int. and other geosynthetics manufacturers for almost 20 years. He started there as an Area Civil Engineer and finally as a Managing Director. In 2016 he started to work in the newly established branch of Tensar in Poland, taking a position of Design Manger and later as a Business Development Manager, technically supporting the commercial sales team in Poland. Since 2020, Michal has been working as the Application Technology Manager for Asphalt Interlayers for Europe, Middle East and Africa. At that time, Michal has been involved into 2 huge asphalt rehabilitation projects of >200k sqm each, in Poland and UAE.

Michal is a member of Polish chapters of International Geosynthetics Society (IGS) and European Asphalt Pavement Association (EAPA), and also a member of ISO TC 221 WG 6 Design using geosynthetics and CEN TC 189 WG1 Asphalt Interlayer Project Group. Michal is the author and co-author of several articles published internationally in the engineering magazines as well as at the Polish and international conferences.

Michal has 25 years of experience in working with geosynthetics generally and geogrids & geocomposites specifically.

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