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Groningen, Netherlands

Xiao Y.,Technical University of Delft | Van De Ven M.F.C.,Technical University of Delft | Molenaar A.A.A.,Technical University of Delft | Su Z.,Icopal BV | Chang K.,Wuhan University of Technology
Construction and Building Materials | Year: 2013

Antiskid surfaces are thin surface layers, are often applied to provide enough surface friction. They are optimally designed to meet specific mechanical requirements. These specific requirements mainly include surface friction, resistance to raveling and resistance to chemicals such as de-icing and fuel. To prevent aggregates from raveling, a suitable binder is needed for antiskid surfaces. The binder should have a good weather and ageing resistance, as well as a good adhesion to the asphalt mixture layer. This paper describes in detail a design approach that was developed to investigate potential binders for antiskid applications. A two-component Epoxy Modified Bitumen (EMB) was used as binder in this research. Dynamic Shear Rheometer tests (DSR) and relaxation tests were conducted on original binders, weatherometer aged and oxygen aged binders. Pull tests and shear tests were used to investigate the bonding strength between the newly designed antiskid layer and the underlying asphalt mixture layer. The test results show that the EMB has good high temperature resistance. Ageing can decrease its relaxation property. The complex shear modulus of the binder can increase due to oxygen ageing, while it decreases after long term weatherometer ageing at the high frequency range. The adhesion property at the interface is much higher than the adhesion in the asphalt mixture. © 2013 Elsevier Ltd. All rights reserved. Source

Xiao Y.,Technical University of Delft | Van De Ven M.F.C.,Technical University of Delft | Molenaar A.A.A.,Technical University of Delft | Su Z.,Icopal BV | Zandvoort F.,Icopal BV
Materials and Structures/Materiaux et Constructions | Year: 2011

Coal tar bearing emulsions were used in the Netherlands as binder in anti-skid surfaces for runways because of their perfect adhesion and fuel resistance properties. They are however toxic and will not be allowed anymore after 2010. Therefore alternatives need to be developed. As one of the alternatives, two types of two-component epoxy modified bitumen have been investigated by means of direct tensile tests (DTT), relaxation tests (RT) and dynamic shear rheometer (DSR) tests. The effect of the curing temperature on the strength development of the epoxy modified bitumen was tested. The results show that the tensile strength increases with increasing curing time and temperature. DTT and RT results indicate that this new epoxy modified bitumen has a much higher tensile strength, cures faster than a bitumen emulsion as a binder. Furthermore, it shows a good stress relaxation even at lower temperatures. The curing speed and the ultimate tensile strength after full curing can be easily adjusted. The DSR results show that the complex modulus of this epoxy modified binder is less susceptible to changes in temperature. The results also suggest that this epoxy modified bitumen has better anti-crack properties at lower temperature and less permanent deformation than bituminous binders at higher temperatures. All these results shows that this type of two-component epoxy modified bitumen can be promising as a binder in anti-skid layers. © 2010 The Author(s). Source

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