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Dariusz Sybilski - One of the best experts on this subject based on the ideXlab platform.

  • zero shear viscosity of Bituminous binder and its relation to Bituminous Mixture s rutting resistance
    Transportation Research Record, 1996
    Co-Authors: Dariusz Sybilski
    Abstract:

    When testing viscosity of polymer-bitumen systems a question arises about interpretation of results as those systems behave as non-Newtonian liquids. A simple equation modeling non-Newtonian behavior of polymer-bitumens was proposed (which is a simplified version of the CROSS model). The equation used enables the calculation of zero-shear viscosity η0 from viscosity measurements conducted under various shear conditions, that is, with rotational viscometer at different shear rates (stresses). Test results are presented of several polymer-modified Bituminous binders before and after Thin film oven test aging and discussion of non-Newtonian behavior. The wheel tracking test (Laboratoric Central des Ponts et Chaussees) was conducted for asphalt concrete with several Bituminous binders, either plain bitumens or polymer modified. To estimate Bituminous Mixture's rutting resistance, a new relationship has been proposed to calculate N10 (wheel passes number to rut depth 10 mm). Close correlation was found between...

  • Relationship between absolute viscosity of polymer-modified bitumens and rutting resistance of pavement
    Materials and Structures, 1994
    Co-Authors: Dariusz Sybilski
    Abstract:

    New polymer-modified Bituminous binders require verification of the relationship between binder properties and road pavement performance, formerly found for conventional road bitumens. The paper deals with one particular problem of polymer-bitumen (PB) viscosity and Bituminous Mixture rutting resistance. Non-Newtonian, shear-dependent behaviour of PB in a viscosity meassurement has been characterized by a new equation proposed by the author. This equation enables calculation of the absolute (zero shear rate) viscosity of PB and is applied for evaluation of test results at 60and 90°C. The absolute viscosity of PB at 60°C has been correlated with the Bituminous Mixture's rutting resistance at 45°C. Correlation with other rheological properties of PB is also examined by means of multiple regression analysis.

S.e. Paje - One of the best experts on this subject based on the ideXlab platform.

  • Functional Performance of Stone Mastic Asphalt Pavements in Spain: Acoustic Assessment
    MDPI AG, 2019
    Co-Authors: Vícto F. Vázquez, Fernando Terá, Jeanne Luong, S.e. Paje
    Abstract:

    Environmental noise is one of the problems modern societies face today. Traffic noise, especially the noise produced from tire/pavement interaction, plays a main role in environmental noise. Pavement rehabilitation with new Bituminous Mixtures is a good option for combatting noise pollution in urban areas. This paper studies the functional performance of two Bituminous Mixtures of stone mastic asphalt (SMA), fabricated with the same polymer modified binder, but with different maximum aggregate size (MAS) (SMA11 and SMA16). The acoustic absorption, the dynamic stiffness, the surface texture and the tire/pavement noise were assessed. The Bituminous Mixture type SMA16 has higher texture levels at nearly every depicted wavelength of the texture spectra. This characteristic may lead to its higher average tire/pavement sound level compared to the Mixture SMA11. The influence of each texture wavelength on the different frequency bands of the tire/pavement noise spectrum was studied, however, this relation is not a simple matter. This paper also presents low-noise pavement labeling methodology (LNP labelingLA²IC). The Mixtures SMA11 and SMA16 are labeled at 50 and 80 km/h. An acoustic label is a valuable tool for construction companies and urban planners to use in order to define the best option against noise when pavement rehabilitation must be carried out

  • Field assessment of a Cold-In place-recycled pavement: Influence on rolling noise
    Journal of Cleaner Production, 2018
    Co-Authors: Victoriano Fernández Vázquez, Felipe Teran, Pedro Huertas, S.e. Paje
    Abstract:

    Abstract This work aims to study some surface characteristics (tire/pavement noise, texture, roughness and dynamic stiffness) of an experimental test track section fabricated with Cold-In place-Recycled (CIR) pavement. The field assessment of the experimental section was carried out after two months curing, and prior to being overlaid with a hot Bituminous Mixture. CIR pavement may be a good paving solution in some cases. These Mixtures present some characteristics that make them environmentally friendly mixes regarding conventional hot Bituminous Mixtures, such as their lower temperature of fabrication (low greenhouse gas emissions and fuel consumption) and the use of recycled materials from the same pavement to be rehabilitated. According to the research results, CIR pavement could be presented as a reduced noise surface regarding other conventional hot Bituminous Mixtures. Dynamic stiffness and macrotexture of this studied section mitigate noise at medium frequencies of the tire/pavement noise spectrum, which are the main frequencies of the overall tire/pavement noise levels. Tire/pavement noise generation mechanisms in CIR pavements are discussed according to the achieved results.

Peisheng Zhou - One of the best experts on this subject based on the ideXlab platform.

  • effect of reclaimed asphalt pavement heating temperature on the compactability of recycled hot mix asphalt
    Materials, 2020
    Co-Authors: Zhen Leng, Lili Wang, Peisheng Zhou
    Abstract:

    The compactability of an asphalt Mixture is related to the heating temperature of the materials, but the heating temperature of reclaimed asphalt pavement (RAP) is limited by the production process of hot-in-plant recycled Mixtures. To choose a reasonable heating temperature for RAP according to the compactability, the compaction energy ratio (CER) obtained from the Superpave gyratory compactor compaction curve was developed. The CERs of fourteen kinds of asphalt Mixtures made with different RAPs were compared, all of which were different in type, content, and heating temperature. The results indicated that CER is an effective energy index to evaluate the workability of a Bituminous Mixture, and it considers both the accumulated energy after each gyration and the number of gyrations. It was also found that increasing the heating temperature of the RAP cannot always improve the workability of the recycled Mixture, because the higher heating temperature caused more hard-aged bitumen to be blended with soft virgin bitumen during the mixing process. At the same RAP heating temperature, increasing the RAP content made it more difficult to compact the Mixture, especially for RAPs with styrene–butadiene–styrene (SBS) modified bitumen, and the recycled Mixtures with SBS-modified bitumen were more difficult to compact than those with nonmodified bitumen.

R Micaelo - One of the best experts on this subject based on the ideXlab platform.

  • analysis of the ageing effect on the cyclic tension compression loading behaviour of bitumen and mastics
    Construction and Building Materials, 2020
    Co-Authors: R Micaelo, Ramon Botella, Felix Perezjimenez, Sa M Da Costa
    Abstract:

    Abstract Within the Bituminous Mixture the binder is subjected to different stress-state modes but the cyclic loading response is usually characterized on shear mode. This research investigates the evolution with ageing of the undamaged linear rheological behaviour and resistance to cyclic loading of Bituminous materials using a tension–compression strain-sweep test. The results show that, similarly to the shear mode response, mineral fillers may induce a greater stiffening effect than ageing treatment, although the comparative evolution with ageing of materials may differ from that based on the shear mode response. The damage progression rate increases faster at lower temperatures and for the stiffer materials (mastics), where the flow deformation contribution to crack formation is smaller. The testing temperature is determinant for the evaluation of the effect of ageing and filler on fatigue resistance.

Catherine Froustey - One of the best experts on this subject based on the ideXlab platform.

  • Influence of heterogeneities on mechanical properties: Virtual material concept
    Construction and Building Materials, 2019
    Co-Authors: Roman Zhuravlev, Sandra Guerard, Catherine Froustey
    Abstract:

    The present article is connected to the study of a Bituminous Mixture (BM) material, used on modern railway track as sub-ballast layer. Influence of size and volume fraction of rigid monodisperse spherical inclusions, randomly packed into a hyperelastic matrix, on the mechanical behavior of an obtained composite structure was investigated using ‘‘Virtual Material” approach. 3D geometry of inclusions was defined and used for 3D printing and 3D finite element modeling. This approach allows a numerical study of a theoretical case without losing connection with real experiment (by means of direct geometrical correspondence). Parameters of 7 specimens were chosen in accordance with a Doehlert experimental design. Analysis performed on the basis of the ‘‘response surfaces” approach has shown that mechanical parameters of studied specimens have a strong dependence on the value of inclusions volume fraction and almost no dependence on the value of the size of inclusions. Stress/strain concentrations were analyzed using FE method in order to find and to visualize load-bearing chains going through the matrix. It was found that Von Mises stress in load-bearing chains is almost 8 times higher than the average in the matrix.