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doc. Ing. Otakar Vacín, Ph.D.

doc. Ing. Otakar Vacín, Ph.D.

The aim of the research will be to design a new type of modified asphalt binder based on secondary raw materials (waste plastics). For successful research and development, design, assessment of mechanical properties of indepth research is required. The research and development will be carried out at the Faculty of Transport and in collaboration with other research institutes. The aim is to combine the knowledge and technologies acquired in the individual fields - mix design Faculty of Transport, microplastic content determination Institute for Hydrodynamics of the Academy of Sciences of the Czech Republic, mechanical testing of asphalt mixtures- University of Calgary, Canada. For the above reasons, the application is designed to obtain funding for the completion of a foreign internship, for scientific and publishing activities and to obtain scientific documents for the dissertation to verify the results proposed at the Faculty of Transport. Due to the time commitment of the whole project, the internship is planned for the second half of 2025 and the completion of the dissertation in 2027. The output will include a publication in an impacted journal dealing with pavement issues. The funding will be used for the internship, publications, conferences and measurements of microplastics in water in collaboration with the Academy of Sciences.

2025 - 2026

Studentská grantová soutěž ČVUT - SGS25/099/OHK2/2T/16

Ing. Bc. Petr Kumpošt, Ph.D.; doc. Ing. Otakar Vacín, Ph.D.; Ing. Ondřej Vomočil

With the current steady increase in road traffic, various solutions need to be found to improve the efficiency of the road network. Particularly in inner-city sections, the network is often at the limits of its capacity and various measures are therefore being sought. At present, the emphasis is on the number of vehicles per hour in a particular profile or on setting travel times. The number of people per unit of time is completely overlooked, which would contribute to rational planning of the street space mix. The aim of this project is to take this parameter into account as one of the aspects for the design of dedicated lanes.

2024 - 2025

Studentská grantová soutěž ČVUT - SGS24/101/OHK2/2T/16

Ing. Tomáš Klinský; Ing. Vojtěch Novotný, Ph.D.; Ing. Nikol Richterová, Ph.D.; doc. Ing. Otakar Vacín, Ph.D.

The recent overall increase in the populations mobility has created a greater demand for sustainable mobility, which is essential for the future development of cities. Given the increasing congestion in cities caused by the high number of cars, it is important to focus on public transport, which is a suitable and sustainable alternative to individual car transport. The aim of this project is the application and testing of the Quality of Public Transport Operation Method, which was first mentioned in 2017 and can become an important tool in the implementation of preferential measures and the overall improvement of public transport operation. The project will compare the quality of public transport operation on representative case studies in several Czech and foreign cities.This whole project is part of a broader scientific research activity at the Faculty of Transport of CTU within the PREFOS research group and its outputs are necessary for the PhD student's dissertation.

2024 - 2025

Studentská grantová soutěž ČVUT - SGS24/103/OHK2/2T/16

Ing. Marek Blaščík; doc. Ing. Otakar Vacín, Ph.D.

The research team focuses on innovating of modern approaches for measuring of rheological properties of the asphlat binder. The main body of research is to determine the effect of various type of aging on the modified asphalt binder and to settle the relation between the empirical methods and modern performance oriented ones. Also, the research tries to find the optimal input values of present methods to best determine the rutting resistance of asphalt mixes.

2018 - 2018

Studentská grantová soutěž ČVUT - SGS18/092/OHK2/1T/16

doc. Ing. Otakar Vacín, Ph.D.

Portable pendulum skid resistance equipment contributes to the road safety. The device is used by government organizations, building companies and research institutes concerned with problems in designing, building, maintaining and using roads and highways. New device and methodology, currently under the development, means a direct reading of physical values, gives us the friction coefficient between a skidding tire and dry / wet road surface. It provides engineering companies with a practical means of obtaining reliable scientific evidence on which is possible to take appropriate measure to reduce skidding. A new idea of the equipment is consisting of a bi-directional dynamometric element with the semiconductor strain gauges for simultaneous and independent measurement radial and tangential (frictional) forces between tire and dry / wet surface. Empirical coefficients of skid resistance obtained from recent testers are replaced with technically well-grounded and justified coefficients

Department of Road Structures

2010 - 2010

Studentská grantová soutěž ČVUT - SGS10/030/OHK1/1T/11

Rapid road network deterioration is caused by increase in traffic, especially truck traffic. The goal is to find basic characteristic for hot mix asphalt, which could effectively lead to the better pavement maintenance and enhance life time of pavements.The state of the art in north America is a measurement of hot mix asphalt at different temperatures and loading frequencies. Data obtained in the laboratory has the same value as the one, gathered during the field experiments. Most of the hot mix material testing is still based on empirical evaluation in the Czech Republic. The goal is to develop a procedure based on the dynamic complex modulus. In this project, cylindrical specimens of the hot mix asphalt will be tested in cyclic loading in the linear viscoelastic region. Output of this project is determination of the optimal sample geometry, and new technique for the asphalt hot mix evaluation. This should lead to the development of new hot mix asphalt specification.

Department of Road Structures

2007 - 2009

Post-graduate (doctorate) grants