Pier Paolo Riviera

Pier Paolo Riviera
Politecnico di Torino | polito · DIATI - Department of Environment, Land and Infrastructure Engineering

Associate Professor, PhD

About

51
Publications
9,910
Reads
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207
Citations
Additional affiliations
August 2011 - present
Politecnico di Torino
Position
  • Professor (Assistant)
January 2003 - August 2011
Politecnico di Torino
Position
  • Research Associate

Publications

Publications (51)
Article
Full-text available
This paper presents the results of an experimental investigation which was carried out with the purpose of assessing the performance-related properties of an emulsion-based cold-recycled mixture to be employed as a sustainable solution for the surface finishing of unpaved rural roads. This mixture contained significant quantities of recycled compon...
Chapter
This paper presents the results of a preliminary study on the use of a novel approach for the evaluation of the effectiveness of rejuvenating agents used in asphalt mixtures containing reclaimed asphalt (RA). Such an approach is based on the mechanical testing of model systems constituted by a single-sized RA material, in its original state and aft...
Conference Paper
he problem related to the reuse of sludge deriving from the cutting of ornamental stone is a rel...evant topic for many countries. Even if many studies are carried out on the recovery of sludge resulting from carbonatic cutting rocks the reuse of silicatic sawing sludge remains a challenge due to higher amount of metals than carbonatic stone sludge...
Article
The paper investigates the effects of ageing on the linear and nonlinear viscoelastic properties of bituminous binders for paving applications. Four neat binders were analysed in their unaged state and after long-term ageing, which was simulated in the laboratory with the Rolling Thin Film Oven (RTFO) and the Pressure Ageing Vessel (PAV). Amplitude...
Conference Paper
This paper presents the results of a preliminary study on the use of a novel approach for the evaluation of the effectiveness of rejuvenating agents used in asphalt mixtures containing reclaimed asphalt (RA). Such an approach is based on the mechanical testing of model systems constituted by a single-sized RA material , in its original state and af...
Article
In hot climate regions asphalt mixes can be designed using the classical volumetric approach supplemented by the evaluation of basic mechanical parameters. To minimize the risk of permanent deformation, composition of the mixes can be defined by selecting densely packed aggregates and low binder contents. Despite the effectiveness of such an approa...
Article
Full-text available
Featured Application: The research work presented in this paper may be of value for the management of sawing sludge in the context of a circular economy approach. Potential applications may occur in all modern infrastructures in which high-voltage cables are buried in the pavement subgrade. Abstract: The management of sawing sludge originated from...
Article
This paper presents the results of an experimental investigation which was carried out with the purpose of assessing the performance-related properties of self-compacting cement-bound mixtures to be employed in pavement foundations in road tunnels. The mixtures contained a significant quantity of recycled components and function-specific additives....
Article
Full-text available
The investigation described in this paper focused on the performance-related characterization of cementitious Fluidized Thermal Backfills (FTBs) containing recycled components derived from pavement maintenance and aggregate or stone processing operations. In particular, the study was performed with the purpose of assessing the suitability of these...
Chapter
This paper illustrates the results obtained in a study which focused on the mix design and performance-related characterization of rubberized dense-graded mixtures containing a viscosity reduction additive and different percentages of reclaimed asphalt. Following preliminary mix design, plant-produced mixtures were employed for the construction of...
Chapter
The growing need for high quality paving materials has aroused an increasing interest in innovative reinforcing agents, such as those characterized by nanometric dimensions. The experimental study presented in this paper focused on the use in asphalt mixtures of nanoclays and multiwall carbon nanotubes as bitumen modifiers. The performance characte...
Chapter
Cold asphalt patching mixtures are widely employed in pavement maintenance operations due to their technical and economical effectiveness. However, their selection is seldom based on the results of laboratory characterization tests, since there are no standard procedures which are recognized by the international community for such a purpose. The in...
Chapter
This paper summarizes the studies which were carried out to support pavement design and construction operations in a major motorway tunnel. Candidate pavement cross sections subjected to analysis included a subgrade and foundation layer constituted by self-compacting cement-bound granular mixtures. The potential use of standard cement-stabilized fo...
Article
This paper presents the results of an experimental investigation which focused on self-compacting cement-bound mixtures to be employed for paving applications, especially for pavement foundations in road tunnels. Recipes of the investigated mixtures, which contain reclaimed asphalt pavement material and mineral sludge, were defined by optimizing th...
Article
The study presented in this paper aimed at evaluating the impact of different nanosized additives, including an organophilic nanoclay and multiwall carbon nanotubes, on the fatigue properties of dense‐graded asphalt mixtures. Cyclic direct tension fatigue tests were carried out, and the corresponding results were interpreted by means of a simplifie...
Article
This paper presents the results obtained during a laboratory and field investigation which focused on the assessment of the feasibility of using controlled low strength materials (CLSMs) in pavement foundations of road tunnels. The CLSM considered in the study, which contained a significant amount of recycled asphalt pavement, was designed by optim...
Article
The paper presents the results of a laboratory investigation seeking to quantify the effects of fine quantity and type on the workability and resilient response of aggregate-fine soil mixtures for subbase formation. Laboratory devices were used to simulate in-field conditions and compact samples and evaluate their resilient response under pulsing l...
Conference Paper
Full-text available
The main purpose of the study described in the paper was to explore the possible use of recycled materials, such as Reclaimed Asphalt Pavement (RAP) and mineral sludge, in self-levelling and self-compacting Fluidized Thermal Backfills (FTBs). The assessment was performed by considering FTB mixtures containing different percentages of RAP and minera...
Conference Paper
The study described in this paper aimed to investigate the rutting resistance of bituminous mixtures by means of flow number tests, with a particular emphasis placed on the analysis of the effects produced by var-iations of lateral confinement. Two wearing course mixtures, one standard dense-graded and one rubberized gap-graded, were employed in th...
Article
Full-text available
In the experimental study described in this paper, rutting properties of different bituminous binders and those of corresponding mixtures characterized by common composition and volumetrics were investigated and compared. Single shear creep-recovery (SSCR) tests were carried out on binders for the determination of their creep compliance rate (CCR),...
Article
High volumes of construction and demolition waste (CDW) are continuously produced worldwide. The European Commission aims to increase the recycling of nonhazardous CDW to a minimum of 70% in weight terms by 2020. Hence, there is increasing pressure on researchers to focus on the valorization of these alternative materials for use in the world of co...
Conference Paper
Full-text available
High volumes of construction and demolition waste (CDW) are continuously produced worldwide. The European Commission aims to increase the recycling of non hazardous CDW to a minimum of 70% in weight terms by 2020. Hence, there is increasing pressure on researchers to focus on the valorization of these alternative materials for use in the world of c...
Conference Paper
Full-text available
This paper reports the results of an experimental study focused on the performance evaluation of rubberized bituminous mixtures for pavement wearing courses. The investigation aimed to identify materials which exhibit a satisfactory balance in terms of durability, skid resistance and noise reduction. Rubberized mixtures considered in the study were...
Article
Full-text available
One of the main distresses affecting asphalt pavements is rutting, which originates from the accumulation of permanent deformation caused by traffic loading. In order to prevent such a phenomenon, binders employed for the production of bituminous mixtures need to be selected by taking into account their temperature- and time-dependent behavior. In...
Conference Paper
Full-text available
The study described in this paper analyzed the rutting resistance of asphalt mixtures containing crumb rubber from end-of-life tires. Different rubberized gap-graded mixtures, both prepared in the laboratory and produced in a hot mix plant, were considered in the investigation. Moreover, a standard dense-graded mixture was used as a reference mater...
Conference Paper
The use of crumb rubber derived from end-of-life tires in asphalt mixtures may significantly improve their rutting properties due to increased stiffness and elasticity provided by crumb rubber modification. In addition to binder properties, several other factors influence the occurrence of rutting in asphalt mixtures, including aggregate properties...
Conference Paper
Full-text available
As part of a wider research project for the study and development of a system for the prediction, monitoring and management of meteorological winter emergencies in airports (Airport Weather Information System, AWIS), the experimental investigation reported in this paper focused on damage phenomena caused by antiicing chemicals on asphalt concrete m...
Article
Full-text available
A full-scale test section with asphalt rubber gap-graded wearing course mixture was designed and constructed on a major infrastructure as part of a regional research and implementation project. Standard and performance-related laboratory tests were carried out in order to select constituent materials, define the job-mix formula and monitor construc...
Article
Full-text available
Natural asphalt as an additive in bituminous mixtures was subjected to evaluation by means of performance-related laboratory tests carried out on materials sampled from a production plant and a test section. Compaction issues were discussed by referring to binder viscosity and by considering the volumetrics of laboratory-compacted specimens. Mixtur...
Conference Paper
Full-text available
The application of paints by spraying, extensively used in the automotive industry, represents a significant source of solid waste. The generation of paint sludge, from 2.5 to 5 kg for each painted car, is becoming an important problem both from a managerial and from an environmental point of view owing to its huge volumes and hazardous characteris...
Conference Paper
Full-text available
Following the construction of a major motorway pavement in Northern Africa, relevant rutting phenomena were observed after opening to traffic. Preliminary investigations showed that permanent deformations were limited to the upper wearing course layer which was designed according to set requirements. In order to define the most appropriate rehabil...
Conference Paper
Full-text available
The most effective way to reduce vehicle speed on urban low volume roads, such as residential streets, is the installation of traffic calming systems such as speed humps and tables. In those roads in which these measures are applied, a reduction in traffic volume and accidents is generally observed, with clear benefits for pedestrians, bicyclists a...
Article
Full-text available
The experimental investigation described in this paper refers to the performance-related characterization of cold-recycled bituminous mixtures employed for the construction and maintenance of road pavements. One of the most critical issues that have to be examined for these mixtures is their short term behaviour under loading, since in the early ph...
Conference Paper
The Warm Mix Asphalt (WMA) can be produced through different techniques, including the use of asphalt emulsion, waxes and paraffins, two binder components (soft and hard) and synthetic zeolite. Synthetic zeolite is principally composed of a siliceous structure with large and interconnected spaces, which can accommodate molecules of water. Synthetic...
Conference Paper
Full-text available
The Authors present the results obtained in a experimental investigation carried out to provide technical support to the construction of a cold-recycled bituminous sub-base layer of a major Italian motorway. Compliance of the employed materials and of the resulting recycled mixture to requirements set in Technical Specifications and to the adopted...
Conference Paper
Full-text available
In this paper the Authors present the experimental results obtained by employing recycled plastics in bituminous mixtures in partial substitution of the particles composing the aggregate skeleton. Various types of plastics were sampled from manufacturing plants and/or waste collecting sites. Laboratory tests were carried out in order to define for...
Thesis
In recent years pavement engineering has considerably evolved from many perspectives, with a general improvement of field performance. This improvement should attributed to the development of new materials and technologies and to a more careful management of resources in every stage of infrastructure life, from design to maintenance, through constr...

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