Csaba Toth

Csaba Toth
Budapest University of Technology and Economics · Department of Highway and Railway Engineering

PhD

About

46
Publications
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89
Citations

Publications

Publications (46)
Article
Full-text available
The aim of this research study was to analyse the approaches for establishing a spatial model of a radial truck tyre, based on the finite element method, in order to perform a realistic analysis of static as well as dynamic tyre–pavement interactions. A complex rubber tyre model having a large number of elements was formulated combining current sta...
Article
Full-text available
The French pavement design method provides a very comprehensive, probability-based design approach. It also provides a fairly sophisticated method for establishing the equivalent pavement temperature, which has been used worldwide for different applications. The objective was to analyse the applicability of the French method for calculating the equ...
Article
Full-text available
There are a number of sustainable and environmentally friendly techniques and methods currently available in the construction industry. To promote sustainable development, different rating and certificating systems that evaluate the level of sustainability during the development of infrastructure construction projects have been developed. The aim o...
Article
This paper presents a field study showing the distribution of air voids in asphalt layers, and the potential effect of water on pavement performance. The paper also discusses the applicability of the European test method and equipment for assessing permeability of asphalt layers. A series of laboratory permeability tests were conducted on in-situ c...
Article
Full-text available
A reológiából ismert hőmérséklet-idő hasonlósági elv régóta jól használható eszközt jelent az aszfaltkeverékek viselkedésének tanulmányozásban. Az elv felhasználásával meghatározott ún. mestergörbékkel a különböző hőmérsékleten és frekvencián mért dinamikus merevség értékek részletesen tanulmányozhatók. A mestergörbéket elsődlegesen a szigmoid-függ...
Article
Full-text available
The "Time-Temperature Superposition" known from rheology has long been a useful tool for studying the behaviour of asphalt mixture. Dynamic modulus values are measured at different temperatures and frequencies can be thoroughly studied using the master curves defined by using this principle. The master curves are usually constructed using the sigmo...
Article
Full-text available
Certain elements of the currently used Hungarian pavement design method are based on the mechanistic-empirical pavement design principles, although they are not always readily implemented in practice. When designing a new pavement structure, it is only possible to select predetermined composition from a catalogue. The use of the Hungarian design ca...
Article
Full-text available
To measure the environmental impacts, life cycle assessment techniques appeared. The paper presents the SimaPro, which is one of the most widely, used software for life cycle assessment. Studies indicate that environmental impact can be considerably reduced in the planning and the design stages, if sustainability is evaluated. Therefore, a system o...
Conference Paper
Full-text available
Kivonat: Az okostelefonok beépített szenzorokkal (gyorsulásmérők, giroszkóp), GPS helyazonosítóval, időmérővel, kamerákkal, hálózati kapcsolattal, bővíthető belső memóriával rendelkeznek, mely tulajdonságok alapján használhatók az útgazdálkodásban. Célunk a mobiltelefonos nemzetközi burkolategyenetlenségi index (International Roughness Index, IRI)...
Article
Full-text available
Rising earth temperature and increasing greenhouse gas emission is largely caused by burning fossil fuels. Next to personal vehicle use, public transportation is also having a significant role. Therefore, the electrification of the bus lines is on many countries’ and cities’ agenda. Today, electric buses and trolleys having several drawbacks what n...
Article
The road transport system is currently undergoing significant changes. The development of elements and subsystems is also impacted by external, environmental and internal vehicle-road-human interactions. Accordingly, the roadway structure and the innovation of infrastructure are fundamentally influenced by current technology and vehicle development...
Conference Paper
Full-text available
During past decades, the mechanical analysis became principal discipline in pavement design. As a tool for verifying mechanical effect on pavement and subgrade, finite element method (FEM) is often chosen. By employing FEM, it is easy to estimate the pavement structure's response and stiffness of subgrade. In terms of pavement rehabilitation the su...
Article
Full-text available
Egy megkezdett kutatás részeredményeinek ismertetési célja, hogy az új építésű, aszfaltburkolatú útpályaszerkezetek tervezéséhez és építéséhez olyan alternatív méretezési eljárást biztosítson, amely – a típus-útpályaszerkezetek alkalmazásához képest – megnöveli az altalaj, illetve az épített pályaszerkezeti rétegek anyagi tulajdonságaiban rejlő leh...
Article
Full-text available
It presents the first results of a research work on the analysis of the load bearing capacity of road pavement structures at a network level based on German, Lithuanian and American models, and also two temperature correction methods needed for the application of these pavement bearing capacity models.
Conference Paper
Full-text available
Road pavement bearing capacity performance is basically influenced by the actual subgrade strength. At the same time, this latter parameter is significantly affected by the actual moisture content of sub-grade. The level of its impact depends on the soil type. (The intermediate soils as silts are the most sensitive ones). For considering the meteor...
Data
Abstract The focus on the construction of new roads will certainly face a shift to the widening, maintenance and strengthening of the existing roads and pavements. However, the Hungarian stand- ard referring to asphalt pavement and overlay design is out- dated in many ways, and to efficiently use national resources a proper analytical design mus...
Article
Full-text available
Asphalt industry finds itself battling ongoing economic difficulties and an urge to achieve a more sustainable development and growth. It means constant searching is needed for alternative materials and possibilities to use recycled and processed waste materials in asphalt mixes as long as an expected level of performance and durability is provided...
Article
The load equivalency factors for pavement design currently in use by the Hungarian standard have been developed using Weigh-in-Motion data obtained during the first few years of operations after installing some 30 measuring sites in Hungary in 1996. In the past years, and currently, data is collected mainly at the border crossings of the country, h...
Article
Full-text available
The focus on the construction of new roads will certainly facea shift to the widening, maintenance and strengthening of theexisting roads and pavements. However, the Hungarian standardreferring to asphalt pavement and overlay design is outdatedin many ways, and to efficiently use national resources aproper analytical design must be urgently develop...
Article
The chemically stabilized rubber bitumen (CSRB) has been developed by researchers from the company MOL and the Pannonian University (Hungary). The CSRB is made of used automobile tyres, and it improves the quality of pavement, while also enabling an efficient use of used automobile tyres. Mechanical properties of the chemically stabilized crumb rub...
Research
Full-text available
Kivonat A víz bejut az útpályaszerkezetbe, a teljes vízzáróság feltételezése megkérdőjelezhető. A probléma teljes körű feltárása érdekében a BME Út és Vasútépítési Tanszék laboratóriuma beszerzett egy – az MSZ EN 12697-19 szabvány követelményeit kielégítő – vizsgálóberendezést, amely segítségével lehetséges a laboratóriumi próbatestek valamint fúrt...
Conference Paper
Full-text available
The current Hungarian overlay design manual was developed in the 1990s and no major review has been conducted since then. Therefore the technological and material advances e.g. modified binders and mixes, high modulus mixes, use of reclaimed asphalt pavements, asphalt grids and nets, compromises with local resources, changes in traffic loading and...
Conference Paper
Full-text available
The current Hungarian pavement overlay design method is outdated in respect of considering techniques that are already commonly used. In this paper we present the summary of a mechanical approach of overlay design currently under development at the Budapest University of Technology and Economics, Department of Highway and Railway Engineering. The s...
Article
Full-text available
The use of crumb rubber from vehicle tyres in hot mix asphalt production has been a very promising option in the field of waste recycling and sustainability. The disposal of used vehicle tyres has been a serious and difficult issue. Due to their indestructible nature the options are burning or disposal, none of these are desirable in our global env...
Article
Full-text available
The paper introduces a new method for calculating the elastic moduli of pavement layers. The method requires only two input parameters: the thickness of the upper „bound” layer and the Falling Weight Deflectometer (FWD) or Improved Benkelman Beam Apparatus (IBBA) measurement data. The authors developed a continuously differentiable regression funct...
Article
Full-text available
the trade-off regarding stiffness and low-temperature behaviour of hot mix asphalt (HmA) mixes is well known – the higher the stiffness of an asphalt mix is, the lower its relaxation during fast cooling down in winter, resulting in thermal cracking at higher winter temperatures. the accumulated tensile stress together with the stress deriving from...
Conference Paper
Full-text available
Recently the analyses of the performance of asphalt mixtures have come to the focus of attention also in Hungary, with key importance placed on international asphalt engineering practises as well as the understanding, validated adoption and application of such experiences. The production of asphalt mixture shows a variation between the designed and...
Article
Hot mix asphalt (HMA) performance in terms of fatigue resistance is a well-developed area of pavement design worldwide. Different equipment is available to predict the fatigue performance due to the well supported technical background.Sophisticated pavement design methods utilises the asphalt performance to predict pavement performance and the rela...
Article
Full-text available
The master curve is an appropriate tool to describe the behavior of the different asphalt mixtures. We can analyze the attitude of the asphalt at very special time and frequency range using master curve method and in this extreme condition we could not solve without it. Different shift coefficients calculation's methods were showed in this study. A...
Article
Full-text available
The first part of the article discusses the control level and characteristics analysis of the production of an asphalt mixture produced by a normal asphalt mix plant. By examining the stability of production, the analysis identifies the so called process capability indices as well as the density and distribution functions of the tested parameters....
Article
Full-text available
The concept of ecologically conscious and energy saving roads must be expanded to the performance of the asphalt mixtures as well as to the test related to it. This paper investigates the tests focusing on a better description of the behaviour of asphalts as well as on a deeper revelation of the impact of different compositions. Based on the intern...
Article
Full-text available
Falling Weight Deflectometer (FWD) are widely used for deflection measurements of road pavements. The FWDs can measure the vertical deflections of the pavement in several positions, which distance from the load are optional. In this paper we introduce a mathematical function, which can be fitted to the discreet deflection measurement values. The fi...
Poster
Full-text available
Pavement maintenance costs are in close contact with the condition of the track pavement and the phase of deterioration progress. A pavement’s bearing capacity is not of immediate concert to the road user, but has an important influence on the rate at which a pavement deteriorates. For the maintenance of pavements it is important to know the bearin...

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