Low Environmental Impact Coatings for Road Pavements

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (28 February 2017) | Viewed by 45737

Special Issue Editors


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Guest Editor
Department of Civil, Chemical, Environmental, and Materials Engineering, Università di Bologna, Viale del Risorgimento 2- 40136 Bologna, Italy
Interests: road mainteneance; safety; road materials; skid resistance and surface characteristics of road pavement

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Guest Editor
Department of Civil, Chemical, Environmental, and Materials Engineering, Alma Mater Studiorum Università di Bologna, Bologna, Italy
Interests: road maintenance; safety; road materials; skid resistance and surface characteristics of road pavement
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Special Issue Information

Dear Colleagues,

The “sustainability” concept relates to the prolonging of human economic systems with as little detrimental impact on ecological systems as possible. Construction that exhibits good environmental stewardship and practices that conserve resources in a manner that allow growth and development to be sustained for the long-term without degrading the environment are indispensable in a developed society. Past, current and future advancements in road pavement coatings, as an environmentally sustainable paving material, are especially important because the quantities of asphalt and cement used annually in Europe, as well as in the U.S. and all over the world, are large. This Special Issue is aimed to demonstrate the dual value of some new coatings in regards to the environmental and mechanical performance and to suggest a low environmental impact design procedure for road surfaces. In fact, the use of eco-friendly materials is the first phase towards an eco-compatible design but it cannot be the only step. The eco-compatible approach should be extended also to the design method and material characterization because only with these phases is it possible to exploit the maximum potential properties of the used materials.

In particular, the topics of interest include, but are not limited to:

  • Use of innovative and/or recycled materials in road surface treatments for road maintenance;
  • Physical and functional characteristics of ultra-thin layers for road and airport pavements;
  • Low Noise coatings, in terms of definition and certification of the acoustic qualities of road surfaces and study of compositional characteristics most suitable for the minimization of the noise in the generation process and of maximizing the absorption in the propagation phase;
  • Low Vibration coatings, in terms of minimization of the contribution of the surface of the materials and components of the pavement to the phenomenon of generation of vibrations and exaltation of the effects of damping in the process of propagation through the road platform;
  • Low Rolling resistance coatings, in terms of minimization of fuel consumption and tire to reach a reduction of costs for the user and the impacts on the environment;
  • Low Emission coatings, in terms of innovative materials to reduce the air contaminants, such as NOx and VOC’s;
  • High Visibility coatings, function of color and light absorption characteristics of the material forming the top layers and also closely related to the objectives of safety;
  • High Durability coatings, defined in terms of structural strength and adequate deformation response to traffic loads. It is closely linked to the service life of the road surface. With reference to the coatings, the performance characteristic must be able to evaluate and assess the mechanical behavior—rheology of the mixture and the durability of the materials;
  • High Adherence coatings, a fundamental parameter for achieving the objectives of road safety and connected directly to the compositional characteristics of the coatings and the surface texture;
  • The analysis of the thermal response of different types of coatings for paved surfaces for a reduced Urban Heat Island effect in urban areas;
  • Characterization of pavement surface texture using innovative techniques.

Prof. Dr. Andrea Simone
Dr. Claudio Lantieri
Guest Editors

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Published Papers (6 papers)

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Research

772 KiB  
Article
Alternative Fillers for the Production of Bituminous Mixtures: A Screening Investigation on Waste Powders
by Cesare Sangiorgi, Piergiorgio Tataranni, Francesco Mazzotta, Andrea Simone, Valeria Vignali and Claudio Lantieri
Coatings 2017, 7(6), 76; https://doi.org/10.3390/coatings7060076 - 3 Jun 2017
Cited by 35 | Viewed by 6428
Abstract
There has been a significant increase in the demand for using recycled materials in construction because of the lack and limitation of available natural resources. A number of industrial and domestic waste products are being used in the replacement of traditional materials for [...] Read more.
There has been a significant increase in the demand for using recycled materials in construction because of the lack and limitation of available natural resources. A number of industrial and domestic waste products are being used in the replacement of traditional materials for road construction, and many studies have been carried out in recent years on the use of different recycled materials in substitution of conventional fillers in Asphalt Concretes (AC). The aim of this laboratory research is to analyze the physical characteristics of three different recycled fillers and compare them with those of a traditional limestone filler. The alternative fillers presented in this paper are: a waste bleaching clay that comes from two consecutive stages in the industrial process for decolouring vegetable oils and producing biogas (Ud filler), a dried mud waste from a tungsten mine (MW filler) and a recycled glass powder (Gl filler). Results show significant differences between the fillers, and, in particular, Rigden Voids (RV) seem to have the largest potential influence on the rheology of ACs. Full article
(This article belongs to the Special Issue Low Environmental Impact Coatings for Road Pavements)
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3628 KiB  
Article
Predicting the Wear of High Friction Surfacing Aggregate
by David Woodward and Shaun Friel
Coatings 2017, 7(5), 71; https://doi.org/10.3390/coatings7050071 - 16 May 2017
Cited by 26 | Viewed by 7612
Abstract
High friction surfacing (HFS) is a specialist type of road coating with very high skid resistance. It is used in the UK at locations where there is significant risk of serious or fatal accidents. This paper considers the aggregate used in HFS. Calcined [...] Read more.
High friction surfacing (HFS) is a specialist type of road coating with very high skid resistance. It is used in the UK at locations where there is significant risk of serious or fatal accidents. This paper considers the aggregate used in HFS. Calcined bauxite is the only aggregate that provides the highest levels of skid resistance over the longest period. No naturally occurring aggregate has been found to give a comparable level of in-service performance. This paper reviews the historical development of HFS in the UK relating to aggregate. In-service performance is predicted in the laboratory using the Wear test which subjects test specimens to an estimated 5–8 years simulated trafficking. Examples are given of Wear test data. They illustrate why calcined bauxite performs better than natural aggregate. They show how the amount of calcined bauxite can be reduced by blending with high skid resistant natural aggregates. Data from the Wear test can be related to every HFS laboratory experiment and road trial carried out in the UK for over the last 50 years. Anyone considering the prediction of HFS performance needs to carefully consider the data given in this paper with any other test method currently being considered or used to investigate HFS. Full article
(This article belongs to the Special Issue Low Environmental Impact Coatings for Road Pavements)
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3047 KiB  
Article
Fatigue and Healing Properties of Low Environmental Impact Rubberized Bitumen for Asphalt Pavement
by Ayad Subhy and Davide Lo Presti
Coatings 2017, 7(5), 66; https://doi.org/10.3390/coatings7050066 - 5 May 2017
Cited by 8 | Viewed by 6762
Abstract
The addition of recycled tyre rubber as a modifier to enhance the mechanical properties of bitumen has proven to provide asphalt mixtures with better mechanical performance. However the rubberised bitumen presents the limitation of requiring higher manufacturing and compaction temperatures. This could be [...] Read more.
The addition of recycled tyre rubber as a modifier to enhance the mechanical properties of bitumen has proven to provide asphalt mixtures with better mechanical performance. However the rubberised bitumen presents the limitation of requiring higher manufacturing and compaction temperatures. This could be solved by subjecting the tyre rubber to sort of pre-treatments such as: Adding warm-mix additives and/or using partial devulcanisation. These solutions have the potential of lowering the overall environmental impact of the asphalt pavement, however it is still not clear whether these can be detrimental for the rubberized asphalt binder mechanical properties. This paper investigates the effect on fatigue and healing properties of rubberized bitumen blended with pre-treated crumb rubber. An innovative combined fatigue and healing analysis will be presented and used to compare the several rubberised binders with a neat bitumen. The analysis consists in conducting time sweep tests by means of dynamic shear rheometer, by applying repeated cycles of stress or strain loading at selected temperatures and loading frequency. The healing potential of binders was evaluated by introducing short rest periods after a certain number of load pulses. At last, the unique energy parameter obtained using the Ratio of Dissipated Energy Change approach, was applied to obtain a unique index that could provide combined information for both fatigue binder damage and healing phenomenon. The results showed that the analysed rubberised bitumens show having better fatigue and healing performance when compared to the straight-run bitumen. Full article
(This article belongs to the Special Issue Low Environmental Impact Coatings for Road Pavements)
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8042 KiB  
Article
A Specified Procedure for Distress Identification and Assessment for Urban Road Surfaces Based on PCI
by Giuseppe Loprencipe and Antonio Pantuso
Coatings 2017, 7(5), 65; https://doi.org/10.3390/coatings7050065 - 30 Apr 2017
Cited by 50 | Viewed by 9693
Abstract
In this paper, a simplified procedure for the assessment of pavement structural integrity and the level of service for urban road surfaces is presented. A sample of 109 Asphalt Concrete (AC) urban pavements of an Italian road network was considered to validate the [...] Read more.
In this paper, a simplified procedure for the assessment of pavement structural integrity and the level of service for urban road surfaces is presented. A sample of 109 Asphalt Concrete (AC) urban pavements of an Italian road network was considered to validate the methodology. As part of this research, the most recurrent defects, those never encountered and those not defined with respect to the list collected in the ASTM D6433 have been determined by statistical analysis. The goal of this research is the improvement of the ASTM D6433 Distress Identification Catalogue to be adapted to urban road surfaces. The presented methodology includes the implementation of a Visual Basic for Application (VBA) language-based program for the computerization of Pavement Condition Index (PCI) calculation with interpolation by the parametric cubic spline of all of the density/deduct value curves of ASTM D6433 distress types. Also, two new distress definitions (for manholes and for tree roots) and new density/deduct curve values were proposed to achieve a new distress identification manual for urban road pavements. To validate the presented methodology, for the 109 urban pavements considered, the PCI was calculated using the new distress catalogue and using the ASTM D6433 implemented on PAVERTM. The results of the linear regression between them and their statistical parameters are presented in this paper. The comparison of the results shows that the proposed method is suitable for the identification and assessment of observed distress in urban pavement surfaces at the PCI-based scale. Full article
(This article belongs to the Special Issue Low Environmental Impact Coatings for Road Pavements)
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8408 KiB  
Article
Ride Quality Due to Road Surface Irregularities: Comparison of Different Methods Applied on a Set of Real Road Profiles
by Giuseppe Loprencipe and Pablo Zoccali
Coatings 2017, 7(5), 59; https://doi.org/10.3390/coatings7050059 - 26 Apr 2017
Cited by 33 | Viewed by 7254
Abstract
Road roughness evaluation can be carried out using different approaches. Among these, the assessment of ride quality level perceived by road users is one of the most-used. In this sense, different evaluation methods have been developed in order to link the level of [...] Read more.
Road roughness evaluation can be carried out using different approaches. Among these, the assessment of ride quality level perceived by road users is one of the most-used. In this sense, different evaluation methods have been developed in order to link the level of irregularities present on road surface profiles with the induced detrimental effects in terms of discomfort. In particular, relationships between wavelength content of road profiles and consequent level of comfort perceived had been investigated by using, in general, a mean panel ratings approach. In this paper, four ride quality evaluation methods (Ride Number, Michigan Ride Quality Index (RQI), Minnesota Ride Quality Index and frequency-weighted vertical acceleration, awz, according to ISO 2631 were applied to a set of real road profiles. The obtained results were analyzed, investigating a possible relation between the different indices, comparing them also with the most-used road roughness method worldwide: the International Roughness Index (IRI). The analyses carried out in this work have highlighted how the various rating scales may lead to a different ride quality assessment of the same road pavements. Furthermore, comparing the awz with the values obtained for the other three methods, it was found that their rating scales are set for speeds within the range 80–100 km/h. For this reason, it is necessary to identify new thresholds to be applied for lower speeds, as in the case of urban roads. In this sense, the use of the ISO 2631 approach would seem to be a useful tool. Full article
(This article belongs to the Special Issue Low Environmental Impact Coatings for Road Pavements)
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4499 KiB  
Article
Field Evaluation of Red-Coloured Hot Mix Asphalt Pavements for Bus Rapid Transit Lanes in Ontario, Canada
by Qingfan Liu, Sina Varamini and Susan Tighe
Coatings 2017, 7(5), 58; https://doi.org/10.3390/coatings7050058 - 26 Apr 2017
Cited by 9 | Viewed by 7094
Abstract
Coloured pavements have been implemented by metropolitan areas to denote dedicated lanes for bus rapid transit to maintain a high level of safety. Transit benefits of these installations are well documented. However, field performance of various types of coloured pavement has not been [...] Read more.
Coloured pavements have been implemented by metropolitan areas to denote dedicated lanes for bus rapid transit to maintain a high level of safety. Transit benefits of these installations are well documented. However, field performance of various types of coloured pavement has not been investigated systematically, with questions not being answered. In collaboration with the Regional Municipality of York (ON, Canada) where red pavement sections have been in operation for years for its bus rapid transit lanes, the Centre for Pavement and Transportation Technology at the University of Waterloo (Waterloo, ON, Canada) assessed the performance of various types of red pavements including epoxy paint and red asphalt mixes. It was found that, with significant lower texture depth, epoxy paint surface has disadvantages to red asphalt pavement from a pavement texture and safety perspective. The red asphalt sections in this study were observed as lower yet compatible frictional levels to conventional black pavement. Various types of contamination onto the red pavement were observed during field survey. In addition, the ultraviolet radiation degraded the colour of red asphalt pavement over time and may make it less effective for lane designation. Long-term monitoring is recommended to evaluate the functional and structural performance of red asphalt pavement. Full article
(This article belongs to the Special Issue Low Environmental Impact Coatings for Road Pavements)
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