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Clara Celauro
Department of Engineering, University of Palermo, Viale delle Scienze, Ed. 8, 90128 Palermo, Italy

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Journal article
Published: 06 August 2021 in Sustainability
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An integrated approach based on machine learning and data augmentation techniques has been developed in order to predict the stiffness modulus of the asphalt concrete layer of an airport runway, from data acquired with a heavy weight deflectometer (HWD). The predictive model relies on a shallow neural network (SNN) trained with the results of a backcalculation, by means of a data augmentation method and can produce estimations of the stiffness modulus even at runway points not yet sampled. The Bayesian regularization algorithm was used for training of the feedforward backpropagation SNN, and a k-fold cross-validation procedure was implemented for a fair performance evaluation. The testing phase result concerning the stiffness modulus prediction was characterized by a coefficient of correlation equal to 0.9864 demonstrating that the proposed neural approach is fully reliable for performance evaluation of airfield pavements or any other paved area. Such a performance prediction model can play a crucial role in airport pavement management systems (APMS), allowing the maintenance budget to be optimized.

ACS Style

Nicola Baldo; Matteo Miani; Fabio Rondinella; Clara Celauro. A Machine Learning Approach to Determine Airport Asphalt Concrete Layer Moduli Using Heavy Weight Deflectometer Data. Sustainability 2021, 13, 8831 .

AMA Style

Nicola Baldo, Matteo Miani, Fabio Rondinella, Clara Celauro. A Machine Learning Approach to Determine Airport Asphalt Concrete Layer Moduli Using Heavy Weight Deflectometer Data. Sustainability. 2021; 13 (16):8831.

Chicago/Turabian Style

Nicola Baldo; Matteo Miani; Fabio Rondinella; Clara Celauro. 2021. "A Machine Learning Approach to Determine Airport Asphalt Concrete Layer Moduli Using Heavy Weight Deflectometer Data." Sustainability 13, no. 16: 8831.

Journal article
Published: 19 February 2021 in Sustainability
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Finding an appropriate technical solution for reusing waste plastics is crucial for creating a circular plastic economy. Although mechanical recycling is the best option for recycling post-consumer plastics, some heterogeneous mixed plastics cannot be recycled to produce secondary material due to their very low properties. In this case, alternative routes should be considered in order to limit their disposal as much as possible. Therefore, in order to solve the environmental problems in the landfills of plastic waste recycling, and to improve the mechanical performance of bitumen for road pavement, the reuse of these post-consumer plastic wastes are preliminarily evaluated for the modification of bitumen for road use. The field of polymers used so far and widely studied concerns virgin materials, or highly homogeneous materials, in case of recycled plastics. In this work, a highly heterogeneous mixed plastic—Plasmix—from the separate collection in Italy, is used as a bitumen modifier for road construction. The research focused on the dry (into the mixture) and wet (into the binder) addition of different content of the Plasmix compound, with the aim of assessing the feasibility of the modification itself. Results of the mechanical tests carried out prove an increase in performance and that there is a potential of the addition of the Plasmix compound both for binder and mixture modifications.

ACS Style

Clara Celauro; Rosalia Teresi; Francesco Graziano; Francesco Paolo La Mantia; Antonio Protopapa. Preliminary Evaluation of Plasmix Compound from Plastics Packaging Waste for Reuse in Bituminous Pavements. Sustainability 2021, 13, 2258 .

AMA Style

Clara Celauro, Rosalia Teresi, Francesco Graziano, Francesco Paolo La Mantia, Antonio Protopapa. Preliminary Evaluation of Plasmix Compound from Plastics Packaging Waste for Reuse in Bituminous Pavements. Sustainability. 2021; 13 (4):2258.

Chicago/Turabian Style

Clara Celauro; Rosalia Teresi; Francesco Graziano; Francesco Paolo La Mantia; Antonio Protopapa. 2021. "Preliminary Evaluation of Plasmix Compound from Plastics Packaging Waste for Reuse in Bituminous Pavements." Sustainability 13, no. 4: 2258.

Journal article
Published: 09 December 2020 in Sustainability
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Road construction and maintenance have a great impact on the environment, owing to the huge volumes of resources involved. Consequently, current production procedures and technologies must be properly investigated, for identifying and quantifying the life cycle environmental impacts produced. In this paper, primary data, i.e., site-specific data directly collected or measured on a reference plant, are analyzed for calculating the impact of the production of a hot mix asphalt. The analysis is performed in a from “cradle to gate” approach to estimate the environmental burdens of the production process in an average plant, representative of the existing technology in Italy and Southern Europe. The research outcomes are useful to increase reliability in quantification of asphalt production impacts and the contribution of each component. The results represent a reference basis for producers, designers, and contractors in the decisional phases, identifying the most critical aspects in the current practice and the possible improvements for reducing impacts of road industries. In this regard, efficient energy technologies for reducing the production temperature (such as warm mix asphalt) and burned fuels are proven to assure relevant improvements in the environmental performance.

ACS Style

Giuseppe Sollazzo; Sonia Longo; Maurizio Cellura; Clara Celauro. Impact Analysis Using Life Cycle Assessment of Asphalt Production from Primary Data. Sustainability 2020, 12, 10171 .

AMA Style

Giuseppe Sollazzo, Sonia Longo, Maurizio Cellura, Clara Celauro. Impact Analysis Using Life Cycle Assessment of Asphalt Production from Primary Data. Sustainability. 2020; 12 (24):10171.

Chicago/Turabian Style

Giuseppe Sollazzo; Sonia Longo; Maurizio Cellura; Clara Celauro. 2020. "Impact Analysis Using Life Cycle Assessment of Asphalt Production from Primary Data." Sustainability 12, no. 24: 10171.

Journal article
Published: 31 August 2020 in Polymers
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Polymer-modified bitumen (PMB) is bitumen that has been specifically engineered with polymer for providing enhanced performance in service. The aging of bitumen is a main aspect that is able to affect its final performance: during the production phase in a hot mix plant, all the binders experience short-term aging due to the high processing temperature. The same is true during the production of the modified binder, when the polymer is dispersed at high temperature in the bitumen mass. This paper aims at studying the effect of short-term aging when using different types of modifiers such as recycled polymers obtained from waste materials. A 50/70 penetration-grade bitumen has been modified, and bitumen characterization has been carried out before and after short-term aging; conventional tests, viscosity measurements, and dynamical mechanical analysis have been used to investigate the properties. Different aging indices have been determined for predicting the effect of short-term aging based on the type of modifier. Furthermore, the morphology of the modified bitumen has been investigated via fluorescent microscopy, before and after aging, in order to highlight morphological changes due to aging. The results confirm that aging affects all the modified binders, due to the thermal stress imposed during PMBs production. Nevertheless, polymer modification is proved to reduce the aging effect in terms of an increase in the elastic modulus as experienced by the original binder.

ACS Style

Clara Celauro; Edwina Saroufim; Maria Chiara Mistretta; Francesco Paolo La Mantia. Influence of Short-Term Aging on Mechanical Properties and Morphology of Polymer-Modified Bitumen with Recycled Plastics from Waste Materials. Polymers 2020, 12, 1985 .

AMA Style

Clara Celauro, Edwina Saroufim, Maria Chiara Mistretta, Francesco Paolo La Mantia. Influence of Short-Term Aging on Mechanical Properties and Morphology of Polymer-Modified Bitumen with Recycled Plastics from Waste Materials. Polymers. 2020; 12 (9):1985.

Chicago/Turabian Style

Clara Celauro; Edwina Saroufim; Maria Chiara Mistretta; Francesco Paolo La Mantia. 2020. "Influence of Short-Term Aging on Mechanical Properties and Morphology of Polymer-Modified Bitumen with Recycled Plastics from Waste Materials." Polymers 12, no. 9: 1985.

Article in press
Published: 10 August 2020 in International Journal of Pavement Research and Technology
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The aggregate gradation of bituminous mixtures (hot mix asphalts, HMA) is one of the major factors affecting their surface texture. In turn, this latter is a crucial factor and influences drivers and bystanders’ safety, comfort, and health. Despite this, the design of texture levels still lacks sound bases and dedicated algorithms and this negatively affects the acoustic design of bituminous mixtures. Consequently, the objectives of this study were confined into the derivation of relationships to be used in mix design to predict texture levels. Experimental data were analyzed, in the pursuit of setting up appropriate models and algorithms. Analyses involved the consideration of Bailey-related indicators. Algorithms were then calibrated and tested, in order to allow the validation of the algorithms set up. Results demonstrate that the texture level is well correlated to the asphalt mixture composition. Researchers can benefit from the results obtained for improving understanding of noise-related and rolling resistance-related implications. Furthermore, the same results can be useful for practitioners facing the need to design mixtures complying with ISO or project-specific requirements.

ACS Style

Filippo G. Praticò; Paolo G. Briante; Clara Celauro. Modelling pavement surface characteristics for noise prediction through Bailey-related indicators. International Journal of Pavement Research and Technology 2020, 14, 222 -231.

AMA Style

Filippo G. Praticò, Paolo G. Briante, Clara Celauro. Modelling pavement surface characteristics for noise prediction through Bailey-related indicators. International Journal of Pavement Research and Technology. 2020; 14 (2):222-231.

Chicago/Turabian Style

Filippo G. Praticò; Paolo G. Briante; Clara Celauro. 2020. "Modelling pavement surface characteristics for noise prediction through Bailey-related indicators." International Journal of Pavement Research and Technology 14, no. 2: 222-231.

Journal article
Published: 20 April 2020 in Energies
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The development of the road construction sector determines the consequences on consumption of non-renewable resources, energy expenditure and environmental pollution. Recent sustainability issues have highlighted the importance of efficient design and quality-oriented techniques in this sector, due to the huge amount of materials involved in construction and maintenance activities. Thus, it is necessary to properly quantify the environmental impacts of asphalt mixtures used for pavement construction, considering the whole life cycle of the products. Life cycle assessment (LCA) represents the most appropriate methodological framework for assessing the environmental burdens of a product, from raw material acquisition to final disposal. A common problem for LCA is the lack of primary data useful to calculate the product eco-profile, for a specific production process. In this context, there is generally limited reliable and accurate data regarding the asphalt plant production phase, which represents the most critical phase. Consequently, the aim of this paper is to perform an environmental/energy audit of an asphalt plant and, further, to collect and analyze primary data useful for the definition of the eco-profile of 1 metric ton of hot mix asphalt (HMA), following a “gate to gate” approach, including transport. The asphalt production is examined in a Sicilian batch-mix plant, representing one of the most commonly used for asphalt production in the Italian context. The results are of interest for asphalt mixture producers, contractors, transportation agencies and researchers seeking to quantify asphalt pavement environmental impacts in Italy, based on context-related foreground data.

ACS Style

Vincenzo Franzitta; Sonia Longo; Giuseppe Sollazzo; Maurizio Cellura; Clara Celauro. Primary Data Collection and Environmental/Energy Audit of Hot Mix Asphalt Production. Energies 2020, 13, 2045 .

AMA Style

Vincenzo Franzitta, Sonia Longo, Giuseppe Sollazzo, Maurizio Cellura, Clara Celauro. Primary Data Collection and Environmental/Energy Audit of Hot Mix Asphalt Production. Energies. 2020; 13 (8):2045.

Chicago/Turabian Style

Vincenzo Franzitta; Sonia Longo; Giuseppe Sollazzo; Maurizio Cellura; Clara Celauro. 2020. "Primary Data Collection and Environmental/Energy Audit of Hot Mix Asphalt Production." Energies 13, no. 8: 2045.

Journal article
Published: 11 July 2019 in International Journal of Geotechnical Engineering
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ACS Style

Marco Rosone; Bartolomeo Megna; Clara Celauro. Analysis of the chemical and microstructural modifications effects on the hydro-mechanical behaviour of a lime-treated clay. International Journal of Geotechnical Engineering 2019, 15, 447 -460.

AMA Style

Marco Rosone, Bartolomeo Megna, Clara Celauro. Analysis of the chemical and microstructural modifications effects on the hydro-mechanical behaviour of a lime-treated clay. International Journal of Geotechnical Engineering. 2019; 15 (4):447-460.

Chicago/Turabian Style

Marco Rosone; Bartolomeo Megna; Clara Celauro. 2019. "Analysis of the chemical and microstructural modifications effects on the hydro-mechanical behaviour of a lime-treated clay." International Journal of Geotechnical Engineering 15, no. 4: 447-460.

Journal article
Published: 27 November 2018 in Construction and Building Materials
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Pavement deformation is a critical issue in the design of pavement structures and the related mixture. Asphalt concretes may be very sensitive to this problem, in compliance with the viscoelastic behaviour of the adopted bitumen. To improve the material performance, many attempts have been made to introduce in the mixture other materials as “modifiers” or “additives” for increasing the permanent deformation resistance and the elastic modulus of the material. Among the different possible materials, polymers determined significant improvements in the road pavement performance. In this paper, the authors tested the adoption of a specifically engineered polymeric compound, in order to evaluate its effects on a generic asphalt mixture. Several tests were used to prove the effectiveness of the modification. Tests were performed not only in the laboratory, but also in an actual pavement section of the International Airport of Palermo in Sicily. Tests results prove that a proper mix-design can assure a decrease in the permanent deformations, remarkable growth of the material modulus with a reduced bitumen percentage, with economical savings. Finally, regarding fatigue resistance, the modified mixture with low bitumen content assures performance comparable to the control mix containing higher bitumen percentage. Then, the proposed application can be very useful to improve pavement performance even when using softer binder, easier to find in the Italian context.

ACS Style

C. Celauro; G. Bosurgi; G. Sollazzo; M. Ranieri. Laboratory and in-situ tests for estimating improvements in asphalt concrete with the addition of an LDPE and EVA polymeric compound. Construction and Building Materials 2018, 196, 714 -726.

AMA Style

C. Celauro, G. Bosurgi, G. Sollazzo, M. Ranieri. Laboratory and in-situ tests for estimating improvements in asphalt concrete with the addition of an LDPE and EVA polymeric compound. Construction and Building Materials. 2018; 196 ():714-726.

Chicago/Turabian Style

C. Celauro; G. Bosurgi; G. Sollazzo; M. Ranieri. 2018. "Laboratory and in-situ tests for estimating improvements in asphalt concrete with the addition of an LDPE and EVA polymeric compound." Construction and Building Materials 196, no. : 714-726.

Journal article
Published: 20 September 2018 in International Journal of Pavement Engineering
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ACS Style

Marco Rosone; Clara Celauro; Alessio Ferrari. Microstructure and shear strength evolution of a lime-treated clay for use in road construction. International Journal of Pavement Engineering 2018, 21, 1147 -1158.

AMA Style

Marco Rosone, Clara Celauro, Alessio Ferrari. Microstructure and shear strength evolution of a lime-treated clay for use in road construction. International Journal of Pavement Engineering. 2018; 21 (9):1147-1158.

Chicago/Turabian Style

Marco Rosone; Clara Celauro; Alessio Ferrari. 2018. "Microstructure and shear strength evolution of a lime-treated clay for use in road construction." International Journal of Pavement Engineering 21, no. 9: 1147-1158.

Journal article
Published: 01 July 2018 in Construction and Building Materials
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The paper deals with the development of asphalt mixtures for high performing binder and base courses, modified with both commercial and waste polymeric additives, via dry process. The focus was on the mix design of high performing mixtures making use of average quality aggregate and average penetration grade bitumen (as locally available) instead of the usually required high quality components, manly very hard bitumen, thus aiming to improve the reference mixture as made possible by suitable polymers. Mixtures were subjected not only to conventional tests for mix design purposes, but also to advanced tests for performance evaluation such as rutting resistance and fatigue resistance. The dynamic modulus was also evaluated by means of modulus tests in triaxial cell. The test results provided useful information about the use of studied additives for bituminous mixtures. In details, when selecting a High Modulus Base aggregate gradation, the addition of polymeric additives is proved to improve mechanical performances such as modulus and permanent deformation resistance even when using average quality aggregate and less hard bitumen (more easily available in Southern Italy) than those typically used for these special formulations, with beneficial environmental consequences (saving of high quality, not-renewable resources).

ACS Style

M. Ranieri; C. Celauro. Improvement of high modulus asphalt mixtures with average quality aggregate and bitumen by application of polymeric additives. Construction and Building Materials 2018, 178, 183 -194.

AMA Style

M. Ranieri, C. Celauro. Improvement of high modulus asphalt mixtures with average quality aggregate and bitumen by application of polymeric additives. Construction and Building Materials. 2018; 178 ():183-194.

Chicago/Turabian Style

M. Ranieri; C. Celauro. 2018. "Improvement of high modulus asphalt mixtures with average quality aggregate and bitumen by application of polymeric additives." Construction and Building Materials 178, no. : 183-194.

Journal article
Published: 01 May 2018 in Construction and Building Materials
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This paper shows the results of an experimental study concerning the effect of introduction of basalt fibres in asphalt mixtures for surface course, mainly with regard to those to be used in urban areas, for dedicated bus lanes. Surface layers, where tire-pavement interactions occur, have to provide different properties such as high friction (very important for users’ safety), stability, resistance to meteorological agents, and contribution to the overall pavement performances. Considering that basalt fibres provide considerable physical and mechanical properties and above all high abrasion resistance, scope of the study is to evaluate the effects of these fibres on mixtures properties, especially in terms of friction and rutting behaviour. For this purpose, after setting up a model to estimate the impact of fibres on asphalt film thickness and richness modulus, the mixtures produced were subjected to laboratory tests for performance evaluation in terms of rutting resistance and the surface texture. The test results allow drawing some important conclusions about basalt fibre-modified asphalt mixtures: in particular, these mixtures show better performance with reference to permanent deformation resistance when compared with the traditional mixture; moreover, the introduction of basalt fibres involves a “flattening” of the profile texture and a lower macrotexture. Interestingly, fibres addition is likely to slightly increase the micro-texture. This point calls for further study.

ACS Style

C. Celauro; F.G. Praticò. Asphalt mixtures modified with basalt fibres for surface courses. Construction and Building Materials 2018, 170, 245 -253.

AMA Style

C. Celauro, F.G. Praticò. Asphalt mixtures modified with basalt fibres for surface courses. Construction and Building Materials. 2018; 170 ():245-253.

Chicago/Turabian Style

C. Celauro; F.G. Praticò. 2018. "Asphalt mixtures modified with basalt fibres for surface courses." Construction and Building Materials 170, no. : 245-253.

Journal article
Published: 01 January 2018 in Measurement
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In order to guarantee safety and driving comfort and to maintain an efficient railway infrastructure, the first step is to carefully monitor the track geometry and wear level of the materials constituting the superstructure. To that end diagnostic trains are widely used on main lines, in that they can detect several geometric track parameters and rail wear, but under no circumstances they can yet detect ballast gradation. Due to the practical implications for the planning of maintenance operations on the railway network, this article presents a â\u80\u9cDIPâ\u80\u9d digital image processing technique for measuring the transverse profile and corrugations of the rails as well as ballast gradation. The research was carried out in the laboratory on samples of worn-out rails taken from operational railway lines and in situ in the case of ballast analyses. For the latter, the reliability of the results obtained was assessed by comparison with available results yielded by traditional testing methods. It is shown that the proposed technique can be used not only for laboratory analyses, but most conveniently for high-efficiency in situ surveys, along with the methods traditionally adopted by the railway managing authorities thus contributing to lowering the maintenance cost associated with rail inspection

ACS Style

Marco Guerrieri; Giuseppe Parla; Clara Celauro. Digital image analysis technique for measuring railway track defects and ballast gradation. Measurement 2018, 113, 137 -147.

AMA Style

Marco Guerrieri, Giuseppe Parla, Clara Celauro. Digital image analysis technique for measuring railway track defects and ballast gradation. Measurement. 2018; 113 ():137-147.

Chicago/Turabian Style

Marco Guerrieri; Giuseppe Parla; Clara Celauro. 2018. "Digital image analysis technique for measuring railway track defects and ballast gradation." Measurement 113, no. : 137-147.

Journal article
Published: 01 January 2018 in Construction and Building Materials
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The paper presents the results of the rheological characterisation of polymer-modified bitumen for paving applications. In order to find a simple interpretation of the influence of polymer type on the blends produced, in this study high density and low density polyethylene (PE) with different chemical properties were used, as well as ethylene-vinyl acetate. The chemical characteristics of the base bitumen and the polymers used were determined by means of SARA analysis and Fourier Transform Infrared Spectroscopy, FTIR, respectively. The morphology of the produced blends was investigated by means of fluorescent light optic microscopy, while the mechanical properties were investigated with both conventional tests and rheological measurements (dynamic mechanical analysis through frequency sweep test and viscosity measurements). The analysis of the modified bitumens was carried out based on the chemical structure and crystallinity properties of the polymer used. The flow curves (viscosity vs shear rate), in particular, proved to be an initial indicator of the type of modification attained. This shows that simple tests can be helpful in predicting the internal structure of the polymer modified binders (PMBs) and thus in selecting promising polymer/bitumen blends of the PE family to be submitted to full characterization for production purposes

ACS Style

Edwina Saroufim; Clara Celauro; Maria Chiara Mistretta. A simple interpretation of the effect of the polymer type on the properties of PMBs for road paving applications. Construction and Building Materials 2018, 158, 114 -123.

AMA Style

Edwina Saroufim, Clara Celauro, Maria Chiara Mistretta. A simple interpretation of the effect of the polymer type on the properties of PMBs for road paving applications. Construction and Building Materials. 2018; 158 ():114-123.

Chicago/Turabian Style

Edwina Saroufim; Clara Celauro; Maria Chiara Mistretta. 2018. "A simple interpretation of the effect of the polymer type on the properties of PMBs for road paving applications." Construction and Building Materials 158, no. : 114-123.

Journal article
Published: 01 October 2017 in Journal of Materials in Civil Engineering
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The mechanical performance of a typical surface course mixture, modified with two different plastic wastes, both via the wet and dry processes, was evaluated in this study. Water sensitivity, rutting resistance, stiffness modulus, and fatigue cracking resistance tests were used. The results obtained indicated that the polymer-modified mixtures showed similar or improved performance when compared with that of a conventional control mixture produced with a harder virgin grade bitumen, not always available, or available at higher costs, in several countries. Thus, modifying asphalt mixtures with these plastic wastes can be an economical and ecological alternative for paving works. Moreover, the mixtures produced via the dry process showed increased water sensitivity and stiffness modulus properties. This holds out new possibilities for use of polymer-modified mixtures, especially in developing countries, because it widens the possibility of using locally available bitumen, of variable quality, for producing mixtures with higher performance. This can be achieved at real scale with no major extra costs because the dry process does not require modification of typical asphalt plants.

ACS Style

Mauro Ranieri; Liliana Costa; Joel R. M. Oliveira; Hugo Manuel Ribeiro Dias Da Silva; Clara Celauro. Asphalt Surface Mixtures with Improved Performance Using Waste Polymers via Dry and Wet Processes. Journal of Materials in Civil Engineering 2017, 29, 04017169 .

AMA Style

Mauro Ranieri, Liliana Costa, Joel R. M. Oliveira, Hugo Manuel Ribeiro Dias Da Silva, Clara Celauro. Asphalt Surface Mixtures with Improved Performance Using Waste Polymers via Dry and Wet Processes. Journal of Materials in Civil Engineering. 2017; 29 (10):04017169.

Chicago/Turabian Style

Mauro Ranieri; Liliana Costa; Joel R. M. Oliveira; Hugo Manuel Ribeiro Dias Da Silva; Clara Celauro. 2017. "Asphalt Surface Mixtures with Improved Performance Using Waste Polymers via Dry and Wet Processes." Journal of Materials in Civil Engineering 29, no. 10: 04017169.

Journal article
Published: 01 January 2017 in Journal of Cleaner Production
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In this paper, considering the sever impact of road infrastructures on both the surrounding environment as well as on the consumption of locally available natural resources, different road construction techniques have been studied and compared, in order to be able to rank the best solution in terms of environmental sustainability. For the aims of this study, a Life Cycle Analysis has been carried out on a road infrastructure with the most representative geometrical characteristics among those widely used in Italy, in suburban areas, with the help of an appropriate software, the PaLATE. The environmental effects due to both the use of recycled materials, such as the Reclaimed Asphalt Pavement (RAP) from dismissing of damaged pavement layers, and the reuse of fine soil from excavation, traditionally sent to landfill, has been studied. The latter is possible thanks to lime stabilization of clayey soils, that allows to reduce the need of transport to the dump as well as the need for non-renewable natural resources for road subgrades and embankments. The results here obtained show how the use of RAP, can lead to a significant reduction in pollutant emissions and energy consumption compared to that due to pavements constructed with virgin material only. A similar observation can be made for fine soils stabilized (in situ) with lime: it is demonstrated that this technique is able not only to significantly improve the mechanical properties of useless soils that, otherwise, would be considered as a waste to be dumped but also to provide considerable environmental benefits. Finally, in order to identify a criterion for achieving lower generalized costs in the whole life cycle of a road, the different construction options have been estimated in terms of total direct costs, assessed as the sum of construction and maintenance costs. It has been verified that the use of sustainable construction techniques (RAP and lime stabilization of clayey soils) can lead to the reduction of total cost and thus allows allocating greater financial resources to perform an “ideal” maintenance plan

ACS Style

Clara Celauro; Ferdinando Corriere; Marco Guerrieri; Barbara Lo Casto; Angela Rizzo. Environmental analysis of different construction techniques and maintenance activities for a typical local road. Journal of Cleaner Production 2017, 142, 3482 -3489.

AMA Style

Clara Celauro, Ferdinando Corriere, Marco Guerrieri, Barbara Lo Casto, Angela Rizzo. Environmental analysis of different construction techniques and maintenance activities for a typical local road. Journal of Cleaner Production. 2017; 142 ():3482-3489.

Chicago/Turabian Style

Clara Celauro; Ferdinando Corriere; Marco Guerrieri; Barbara Lo Casto; Angela Rizzo. 2017. "Environmental analysis of different construction techniques and maintenance activities for a typical local road." Journal of Cleaner Production 142, no. : 3482-3489.

Articles
Published: 23 October 2015 in European Journal of Environmental and Civil Engineering
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Knowledge and prediction of viscoelastic behaviour of asphalt binder is of great interest in order to design asphalt mixtures for civil construction of road and airports with good performances. The capability of a fractional model – requiring a very limited number of parameters – to describe and predict the linear viscoelastic behaviour of asphalt binder subjected to sinusoidal oscillations is investigated. Experimental data of complex modulus, |G*|, and phase angle, δ, are used to validate the proposed constitutive model. Based on the proposed extension of a fractional model, complex modulus isotherms for a range of frequencies can be created simply starting from isochronals at frequency value of 1 Hz. Furthermore, a mathematical procedure derived from the same model is proposed in order to compute the shift factors and automatically create the master curve, thus avoiding further errors due to manual adjustments. This shifting procedure requires only a few isotherms to create a smooth master curve able to describe asphalt binder behaviour under a wide range of temperature and loading conditions. When the fractional model is adopted and the mathematical shifting procedure is applied, only a temperature sweep test at 1 Hz is needed in order to create complex modulus and phase angle master curves.

ACS Style

Clara Celauro; Claudia Fecarotti; Antonina Pirrotta. An extension of the fractional model for construction of asphalt binder master curve. European Journal of Environmental and Civil Engineering 2015, 21, 1 -16.

AMA Style

Clara Celauro, Claudia Fecarotti, Antonina Pirrotta. An extension of the fractional model for construction of asphalt binder master curve. European Journal of Environmental and Civil Engineering. 2015; 21 (1):1-16.

Chicago/Turabian Style

Clara Celauro; Claudia Fecarotti; Antonina Pirrotta. 2015. "An extension of the fractional model for construction of asphalt binder master curve." European Journal of Environmental and Civil Engineering 21, no. 1: 1-16.

Journal article
Published: 01 June 2015 in Transportation Research Part D: Transport and Environment
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This work explores the influence of climate changes on the proper selection of asphalt binder for pavement construction purposes, according to the Performance Grade (PG) defined in the SUPERPAVE specifications. Based on temperature data at national level, it is possible to obtain thematic maps for the whole Italian territory, which is extremely useful for technicians and pavement engineers for selection of asphalt binder for road construction purposes. Furthermore, the statistical significant temperature trends’ knowledge enables deriving thematic maps which allows to include the effects of climate change in the asphalt binder design. It is argued that, due to climate change, the binders to be selected may be different from those commonly selected at the design stage of the infrastructure, since likely higher temperature determine more demanding constraints. The comparison among the PG grades necessary for covering the needs for construction in the different regions of Italy also call for highly performing binders, such as those obtained via specific modification with polymers. This will also imply the need for even more performing materials, in terms of mechanical properties and durability, to be used for modification of neat asphalt as well as the need for defining new specification and testing methods, specifically valid for these modified materials

ACS Style

Francesco Viola; Clara Celauro. Effect of climate change on asphalt binder selection for road construction in Italy. Transportation Research Part D: Transport and Environment 2015, 37, 40 -47.

AMA Style

Francesco Viola, Clara Celauro. Effect of climate change on asphalt binder selection for road construction in Italy. Transportation Research Part D: Transport and Environment. 2015; 37 ():40-47.

Chicago/Turabian Style

Francesco Viola; Clara Celauro. 2015. "Effect of climate change on asphalt binder selection for road construction in Italy." Transportation Research Part D: Transport and Environment 37, no. : 40-47.

Journal article
Published: 01 January 2015 in Transportation Research Part D: Transport and Environment
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The aim of this work is to carry out a comparative analysis of environmental impacts for different scenarios of a typical local road. Life Cycle ssessment (LCA) is the modeling tool\ud used to quantify and characterize comparative environmental impacts. In carrying out this specific application of the LCA, different road construction techniques were considered with regards to the whole structure and compared in order to identify the best alternative\ud in terms of environmental sustainabilit

ACS Style

Clara Celauro; Ferdinando Corriere; Marco Guerrieri; Barbara Lo Casto. Environmentally appraising different pavement and construction scenarios: A comparative analysis for a typical local road. Transportation Research Part D: Transport and Environment 2015, 34, 41 -51.

AMA Style

Clara Celauro, Ferdinando Corriere, Marco Guerrieri, Barbara Lo Casto. Environmentally appraising different pavement and construction scenarios: A comparative analysis for a typical local road. Transportation Research Part D: Transport and Environment. 2015; 34 ():41-51.

Chicago/Turabian Style

Clara Celauro; Ferdinando Corriere; Marco Guerrieri; Barbara Lo Casto. 2015. "Environmentally appraising different pavement and construction scenarios: A comparative analysis for a typical local road." Transportation Research Part D: Transport and Environment 34, no. : 41-51.

Journal article
Published: 08 November 2014 in Granular Matter
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The macroscopic mechanical behaviour of dense sands originates to a great extent from their microstructural characteristics such as the coordination number, the grain contact and the packing density indexes. The study of intergranular contacts and the reckoning of these indexes may be carried out on planar images of the grains either by means of time-consuming visual inspection assisted by CAD or by automatic image analysis. An innovative method for the automatic determination of microstructural characteristics of sands based on image analysis of thin section is proposed. Tests performed on a locked sand show that the proposed method is much more effective, convenient and faster than the usual visual inspection technique. Therefore, it can be considered an extremely useful tool for calibrating predictive models for arrangements of granular media based on computer simulations.

ACS Style

Clara Celauro; Maurizio Ziccarelli; Giuseppe Parla; Calogero Valore. An automated procedure for computing the packing properties of dense and locked sands by image analysis of thin sections. Granular Matter 2014, 16, 867 -880.

AMA Style

Clara Celauro, Maurizio Ziccarelli, Giuseppe Parla, Calogero Valore. An automated procedure for computing the packing properties of dense and locked sands by image analysis of thin sections. Granular Matter. 2014; 16 (6):867-880.

Chicago/Turabian Style

Clara Celauro; Maurizio Ziccarelli; Giuseppe Parla; Calogero Valore. 2014. "An automated procedure for computing the packing properties of dense and locked sands by image analysis of thin sections." Granular Matter 16, no. 6: 867-880.

Journal article
Published: 01 December 2012 in Construction and Building Materials
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Bearing in mind the need to answer one of the most frequent needs for civil construction, in general, and\ud major project such as road infrastructures in particular, this paper presents the results of a laboratory\ud experimental study in order to evaluate the performance improvement that is possible to achieve when\ud modifying road bitumen with CRM (Crumb Rubber Modifier) from discarded tire rubber (TR), using a Wet\ud Process.\ud The environmental advantage is double, since the aim of the research is to obtain high performance\ud road bitumen thanks to the re-use of a discarded material, such as the rubber tires, which otherwise\ud would be dumped in scrap-yard.\ud In particular, this experimental study aimed to define a laboratory optimization protocol that allowed\ud to discriminate amongst the different asphalt–rubber blends, in relation to the different content of rubber,\ud as well as to the blending times, with the possibility of carefully controlling the production temperature\ud throughout the production process. In order to do this, simple and widespread laboratory\ud equipments and procedures have been adopted, such as the Brookfield rotational viscometer, capable\ud of ensuring the representativeness of the final product to be tested.\ud After the optimization study, a comparison was made between the conventional and rheological properties\ud of the optimized rubber–asphalt blend with those of two commercially available PMBs, modified\ud with synthetic rubber type Styrene–Butadiene–Styrene, with two different level of modification: a medium\ud and a high level of polymer, respectively termed as ‘‘Medium’’ and ‘‘High’’ in this study. This comparison\ud allows one to appreciate to what extent control of the modification process is able to affect\ud the properties of the final product and shows that the preliminary optimization of the mixing parameters\ud carried out with the proposed protocol allows one to obtain a rubber–bitumen blend with improved performances,\ud above all reduced temperature susceptibility, as proved by an increase in the Superpave™\ud high temperature performance grading, up to a two grade jump, which it is possible to obtain only for\ud SBS modified bitumen with high content of polymer.\ud Therefore, this study proves that, thanks to the appropriate re-use of crumb rubber form scrap tires,\ud with the proposed optimization protocol it is possible obtain improved bitumen with high content of\ud recycled materials that, with respect to specific needs of regions with warm climates such as the Mediterranean\ud area, can be considered as ‘‘high-performance blends’’

ACS Style

Bernardo Celauro; Clara Celauro; Davide Lo Presti; Antonio Bevilacqua. Definition of a laboratory optimization protocol for road bitumen improved with recycled tire rubber. Construction and Building Materials 2012, 37, 562 -572.

AMA Style

Bernardo Celauro, Clara Celauro, Davide Lo Presti, Antonio Bevilacqua. Definition of a laboratory optimization protocol for road bitumen improved with recycled tire rubber. Construction and Building Materials. 2012; 37 ():562-572.

Chicago/Turabian Style

Bernardo Celauro; Clara Celauro; Davide Lo Presti; Antonio Bevilacqua. 2012. "Definition of a laboratory optimization protocol for road bitumen improved with recycled tire rubber." Construction and Building Materials 37, no. : 562-572.