Davide Dalmazzo

Davide Dalmazzo
Politecnico di Torino | polito · DIATI - Department of Environment, Land and Infrastructure Engineering

PhD

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61
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776
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Publications

Publications (61)
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
Glass transition is a second order transition that takes place within a relatively narrow temperature range in amorphous or semi-crystalline materials as they become glassy and brittle. The glass transition temperature (Tg) is the temperature selected to represent this transition and is an important indicator of the low temperature properties of ma...
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...
Article
This paper studies the potential effects of Reclaimed Asphalt Pavement (RAP) fine particles on bituminous mixtures by means of a laboratory investigation performed at the mastic scale. Bituminous mastics, characterised by a constant filler to bitumen volume ratio, were prepared by combining virgin filler and virgin bitumen with several dosages of R...
Article
Full-text available
The research described in this paper deals with the experimental evaluation and modeling of physical hardening in asphalt binders. The term physical hardening refers to a reversible phenomenon occurring at low temperatures that causes time-dependent changes in viscoelastic properties. The experimental approach, followed to quantitatively assess phy...
Article
Inter-laboratory experiments were designed to evaluate the impact of plastic waste blended directly in bitumen and to assess the properties, using conventional and advanced bituminous binder testing. The blends targeted 5% of plastic waste in 95% bitumen, using two types of polyethylene (PE) primary (pellets) and secondary (shreds) waste. The exper...
Chapter
Full-text available
I am very pleased to share an up-to-date review of the "utilization of rubberised asphalt in Europe". This is a contribution shaped thanks to the support of many estimeed colleagues from several part of Europe (thank all of you so much!!) and co-authored with friends and champions of the recycling of tyre rubber in Italy, Portugal, Spain and Swit...
Article
Full-text available
Paint sludge (PS) is a waste product coming from spray application of paints in automotive industry. For the first time, this work assessed the economic costs and environmental impacts connected to recycling PS in bituminous binders for asphalt pavement applications. Previous works have demonstrated that PS could be used as a replacement of up to 2...
Article
The main objective of the study described in this paper was to identify possible relationships between the chemical composition and the rheological and fatigue properties of asphalt binders. In order to address such an issue, two asphalt binders of different penetration grade were subjected to four ageing treatments of increasing severity, with the...
Article
This paper presents the results of an experimental investigation that focused on the failure properties of asphalt binders at low temperatures. A novel test method was developed, based on the use of the dynamic shear rheometer equipped with 4 mm parallel plates. The method entails the application of constant shear strain rates at various temperatur...
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
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
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...
Article
Full-text available
The study described in this paper focused on the possible use of waste products coming from the production of styrene–butadiene rubber (SBR) and polybutadiene rubber (PBR), as bitumen modifiers. Modified binders containing these products were prepared in the laboratory with different polymer dosages and were thereafter subjected to the evaluation o...
Chapter
Full-text available
The massive exploitation of non-renewable natural resources which has taken place in the last decade has led to significant global environmental concerns. In such a context, the use of non-petroleum-based binders for the construction of bound layers of flexible pavements can represent an effective solution to limit crude oil depletion. The research...
Article
The work presented in this paper focused on the rheological properties of ternary composites for paving applications constituted by bitumen, nano-sized additives and polymer modifiers. Non-functionalized multiwall carbon nanotubes and two types of styrene-butadienestyrene polymers, linear and radial, were used to modify a reference neat bitumen wit...
Article
This paper presents some of the results obtained in a research project focused on the use of paint sludge (PS) as a modifying agent in the production of bituminous binders for paving applications. The scope of the project was to provide an innovative, sustainable and profitable solution to waste management problems which automotive industries have...
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...
Article
Full-text available
The study focused on two new laboratory procedures developed for the determination of crumb rubber content of asphalt rubber binders. The first methodology was on the basis of the comparative analysis of cobalt and antimony content of base bitumen, crumb rubber, and asphalt rubber. The second was on the basis of the analysis of combustion produ...
Article
Full-text available
The paper reports the results of an experimental investigation in which the cohesive healing properties of different types of asphalt binder were evaluated by means of the dissipated energy ratio approach. A specifically designed testing methodology was proposed which involves comparing the response of binders subjected to continuous oscillatory sh...
Article
Application of paints by spraying, extensively used in the automotive industry, generates a solid waste, known as paint sludge, which, if improperly managed, may lead to significant environmental and economic burdens. In the research work described in this paper, use of paint sludge for the production of modified bituminous binders for paving appli...
Article
Full-text available
Physical hardening is a phenomenon that takes place at low temperatures, producing time-dependent isothermal changes in the rheological properties of bituminous binders. Stiffening effects caused by physical hardening combine with those consequent to chemical ageing, thus promoting the build-up of thermally-induced stresses which may lead to premat...
Article
Full-text available
The research work described in the paper focused on fatigue and healing properties of bituminous mastics reinforced with nano-sized additives. Commercially available multiwall carbon nanotubes (CNTs) and montmorillonite nanoclay (NC) were combined with a single base bitumen and a standard mineral filler to produce bituminous mastics. These blends w...
Article
Full-text available
This research work focused on high-temperature properties of bituminous binders nano-reinforced by means of organoclays. A commercial organophilic montmorillonite was used as a second component to nano-reinforce a reference neat bitumen, and as a third component in a polymer-modified binder which was derived from the combination of the reference ne...
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
Crumb rubber (CR) derived from grinding of end-of-life tyres (ELTs) may be successfully used as a bitumen modifier or as a supplementary component in the production of bituminous mixtures employed for the construction and maintenance of road pavements. However, CRs deriving from different sources and production processes yield effects on performanc...
Article
Crumb rubber derived from end-of-life tires is nowadays considered as a valuable component to be employed for the production of high-performance bituminous binders and mixtures. Currently available technologies require such a material to be either pre-mixed with bitumen (“wet” method), with the consequent production of the so-called asphalt rubber...
Article
Asphalt binders play an important role in the rutting performance of road pavements, and therefore their characterisation is crucial in preventing this type of distress. Several studies have been carried out to replace the G */sin δ Superpave criteria which were found to be inadequate to capture the anti-rutting potential of these materials. In thi...
Conference Paper
Crumb rubber (CR) derived from grinding of end-of-life tyres (ELTs) may be successfully used as a bitumen modifier or as a supplementary component in the production of bituminous mixtures employed for the construction and maintenance of road pavements. However, CRs deriving from different sources and processes yield effects on performance under tra...
Conference Paper
The superior performance of bituminous mixtures containing crumb rubber from end-of-life tyres has been widely documented from a structural and functional point of view. However, potential impact of the use of crumb rubber on the health of workers in pavement construction sites has been the subject of a limited number of investigations, with a cons...
Article
Full-text available
In the experimental study reported in this paper a creep-recovery shear test method was used to evaluate the anti-rutting potential of different polymer-modified bituminous binders. The effects of several factors related to modification were investigated, such as polymer type (SBS, styrene–butadiene–styrene vs. ethylene–vinyl–acetate), composition...
Article
Steric hardening is a time dependent phenomenon thatτ can affect the healing properties of bituminous binders. In the experimental investigation reported in this paper, the rheological test method proposed for the evaluation of healing involved the use of a prolonged rest period included between two continuous oscillatory loading phases. A simple m...
Conference Paper
Full-text available
This paper presents the results of a laboratory investigation which focused on the effects caused by the inclusion of coarse crumb rubber in a wearing course mixture produced by means of the so-called “dry” technology. For comparative purposes a reference mixture, which did not contain any recycled rubber, was also included in the study. Both mixtu...
Conference Paper
Full-text available
Speeds are affected by several variables such as driver characteristics, vehicle performance, road geometrics, environmental conditions and driving regulations. A knowledge of the relationship between speed and such variables allows conscious speed management on existing and planned roads, with the aim of constraining drivers to select a speed cons...
Conference Paper
Full-text available
The experimental investigation described in this paper refers to the assessment of the relationship between morphology of crumb rubber particles and viscosity of corresponding asphalt rubber binders. Analyses were carried out on crumb rubber products derived from ambient, cryogenic and high pressure waterjet size-reduction processes. Asphalt rubber...
Conference Paper
Full-text available
A laboratory study was carried on the effects of physical hardening on the low-temperature performance of bitumen and corresponding asphalt mixtures. Bitumen testing involved measurements of glass transition temperature and creep stiffness at various isothermal storage times. Mixture testing included evaluation of glass transition temperature, ther...
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...
Article
Full-text available
The study presented in this paper focused on the use of carbon nanotubes (CNT) in bituminous binders. By employing a single reference base bitumen and multiwall CNTs, several bitumen-CNT blends were prepared at various concentrations and were subjected to rheological characterization in different aging conditions. Results indicate that when CNTs ar...
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
Based on the analysis of the behaviour of a wide range of bituminous binders employed for paving applications, the Authors have developed in the past specific test protocols for the assessment of damage and healing properties. In the case of damage behaviour, reference is made to a parameter, called Relative Crack Propagation Amplitude (RCPA), whic...
Conference Paper
Full-text available
This paper deals with the recovery of paint sludge as a modifying agent in the production of bituminous binders for paving applications. The sample of paint sludge employed in the experimental investigation was provided by an Italian automotive industry. Its dry residue showed a very high content of organic-based matter and concentrations of heavy...
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
Problem statement: The aim of this study was that of studying the rheology of sewage sludge using two different rheological test protocols taken from literature and comparing them in order to evaluate which useful information are given from every protocol. Approach: Two different protocols have been used taking particularly into account the problem...
Conference Paper
In this paper the authors present the results of an extensive laboratory investigation carried out in order to understand the rheological effects of fibers on bituminous binders. In particular, specific homopolymer polyacrylonitrile fibers have been selected as appropriate for use and have therefore been thoroughly analyzed. It is shown that these...
Conference Paper
Full-text available
In this paper the authors present the results of an extensive laboratory investigation carried out in order to understand the rheological effects of fibers on bituminous binders. In particular, specific homopolymer polyacrylonitrile fibers have been selected as appropriate for use and have therefore been thoroughly analyzed. It is shown that these...
Article
Full-text available
In order to optimize the performance of flexible pavements, one of the key issues which has to be addressed is the characterization and selection of bituminous binders with respect to their capability of contributing to fatigue resistance. In such a context, there is currently the need of developing and validating test protocols and analysis proced...
Article
Full-text available
With respect to the minimization of fatigue cracking in flexible pavements, it is widely recognized that current SUPERPAVE specification criteria do not allow a reliable ranking of the fatigue resistance of bituminous binders. Thus, an alternative characterization procedure, based on the use of time sweep testing protocols and on the concept of Dis...

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