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Adwani, Dheeraj (author), Pipintakos, Georgios (author), Mirwald, Johannes (author), Wang, Yudi (author), Hajj, Ramez (author), Guo, Meng (author), Liang, Meichen (author), Jing, R. (author), Varveri, Aikaterini (author)Oxidative aging induces significant stiffening of asphalt binders that leads to a pronounced reduction in the overall durability of asphalt pavements. The strategic implementation of antioxidant additives provides a potential solution to alleviate this issue. This work presents results from the second phase of the global consortium for...journal article 2024
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Sheils, Emma (author), Connolly, Lorcan (author), O'Connor, Alan (author), OBrien, Eugene (author), Singh, Avishreshth (author), Varveri, Aikaterini (author)Implementation of the circular economy and resource efficiency has the potential to significantly tackle the root causes of global challenges such as climate change, biodiversity loss and pollution whilst at the same time providing regenerative design for generations to come. The CEDR funded CERCOM project facilitates a move towards circular...conference paper 2023
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Hendrikse, Hans C. (author), El Khallabi, Hamza (author), Hartog, Thomas (author), Varveri, Aikaterini (author), Tolboom, Anthon (author)The concept of a circular economy, where waste materials are transformed into valuable resources, is gaining increasing attention. However, many waste streams are difficult to recycle due to their mixed composition and broad molecular distribution. This paper explores the potential of repurposing mixed materials, specifically focusing on...journal article 2023
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Ma, L. (author), Seyed Salehi, H. (author), Jing, R. (author), Erkens, S. (author), Vlugt, T.J.H. (author), Moultos, O. (author), Greenfield, M.L. (author), Varveri, Aikaterini (author)Water transport is one of the major factors responsible for moisture damage in asphalt pavements. To study the thermodynamics and kinetics of water transport in bitumen and to uncover microscale mechanisms of moisture-induced damage, molecular dynamics simulations were performed for up to 600 ns for water–bitumen systems with realistic water...journal article 2023
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Ma, L. (author), Varveri, Aikaterini (author), Jing, R. (author), Erkens, S. (author)The chemical characterization of bitumen type and ageing state are fundamental in determining structural and mechanical properties of bitumen. This work aims to classify various bitumen types at different ageing states and to identify the primary chemical differences relevant to the classification. Fourier transform infrared (FTIR) spectral...journal article 2023
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Ren, S. (author), Liu, X. (author), Varveri, Aikaterini (author), Khalighi, S. (author), Jing, R. (author), Erkens, S. (author)The rejuvenation efficiency of aged bitumen is the main concern when developing rejuvenating agents. It is necessary to develop a method to assess the efficiency of rejuvenators using rheological parameters in the whole frequency region. To this end, the 2S2P1D micromechanics model is adopted to fit the entire G∗ master curves of various...journal article 2023
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Pipintakos, Georgios (author), Lommaert, Caitlin (author), Varveri, Aikaterini (author), Van den Bergh, Wim (author)<b>Correction to: Materials and Structures (2022) 55:146 </b> https://doi.org/10.1617/s11527-022-01986-w </p><p>The article “Do chemistry and rheology follow the same laboratory ageing trends in bitumen?”, written by Georgios Pipintakos, Caitlin Lommaert, Aikaterini Varveri and Wim Van den bergh, was originally published in volume 55, issue...journal article 2023
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Tušar, M. (author), Poulikakos, L. D. (author), Kakar, M. R. (author), Pasquini, E. (author), Pasetto, M. (author), Porot, L. (author), Wang, D. (author), Varveri, Aikaterini (author), Jing, R. (author)RILEM TC-279 WMR task group TG 1 studied the performance of waste Polyethylene (PE) in bituminous binders and bituminous mixtures. Several laboratories participated in this study following a common protocol. Locally sources aggregates and bituminous binder and same source of waste PE were utilized. The binder experiments showed that at high...book chapter 2023
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Ma, L. (author), Varveri, Aikaterini (author), Jing, R. (author), Kasbergen, C. (author), Erkens, S. (author)Moisture in bitumen and at the bitumen-aggregate interface affects the cohesive and adhesive properties of asphalt mixtures, which are critical for the service performance and durability of pavements. This paper aims to investigate the kinetics and thermodynamics of moisture transport in bitumen at various temperatures and relative humidity...journal article 2022
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Pipintakos, Georgios (author), Lommaert, Caitlin (author), Varveri, Aikaterini (author), Van den bergh, Wim (author)The ageing of bitumen has received great attention both from a chemical and rheological perspective due to its direct impact on asphalt performance. However, open questions with respect to the convergence of the synchronous ageing changes in rheology and chemistry of bitumen still exist. This paper addresses these alterations of chemistry and...journal article 2022
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Tušar, Marjan (author), Kakar, Muhammad Rafiq (author), Poulikakos, Lily D. (author), Pasquini, Emiliano (author), Baliello, Andrea (author), Pasetto, Marco (author), Porot, Laurent (author), Wang, Di (author), Lo Presti, Davide (author), Varveri, Aikaterini (author)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...journal article 2022
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Romero Rodriguez, Claudia (author), Ye, Rui (author), Varveri, Aikaterini (author), Rossi, Emanuele (author), Anglani, Giovanni (author), Antonaci, Paola (author), Schlangen, Erik (author), Šavija, Branko (author)Coupling of carbonation and chlorides ingress mechanisms is very common in concrete under certain exposure conditions such as coastal environments. The aggravation/ mitigation of corrosion by the existence of carbonation lies on the fact that microstructural changes due to carbonation result in changes on the transport properties of the material...conference paper 2021
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Romero Rodriguez, C. (author), Ye, R. (author), Varveri, Aikaterini (author), Rossi, E. (author), Anglani, Giovanni (author), Antonaci, Paola (author), Schlangen, E. (author), Šavija, B. (author)Coupling of carbonation and chlorides ingress mechanisms is very common in concrete under certain exposure conditions such as coastal environments. The aggravation/ mitigation of corrosion by the existence of carbonation lies on the fact that microstructural changes due to carbonation result in changes on the transport properties of the material...conference paper 2021
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Mastoras, Filippos (author), Varveri, Aikaterini (author), van Tooren, M.M. (author), Erkens, S. (author)Past research has shown that the ageing process of bitumen is not solely a function of the bitumen type itself, but rather, added effects have been identified attributed to the presence of fillers. Nevertheless, contradicting results exist between the various studies with respect to the implications of fillers on the ageing process of bitumen...journal article 2021
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Margaritis, Alexandros (author), Pipintakos, Georgios (author), Varveri, Aikaterini (author), Jacobs, Geert (author), Hasheminejad, Navid (author), Blom, Johan (author), Van den bergh, Wim (author)The fatigue resistance, as a performance indicator, is of paramount importance for the selection and benchmarking of bituminous materials. The bituminous mortar can be considered as the medium that connects and envelopes the coarse aggregate skeleton, and hence will significantly influence the fatigue resistance at bulk-scale. Therefore this...journal article 2021
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Pipintakos, Georgios (author), Soenen, Hilde (author), Ching, H. Y.Vincent (author), Velde, Christophe Vande (author), Doorslaer, Sabine Van (author), Lemière, Filip (author), Varveri, Aikaterini (author), Van den bergh, Wim (author)Understanding the fundamental mechanisms of oxidative ageing in bitumen is considered of paramount importance in order to take steps towards durable binders able to tackle distresses related to this phenomenon which deteriorates the asphalt performance. This paper focuses on the identification of the intermediate and final oxygenated products...journal article 2021
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Wang, H. (author), Liu, X. (author), Varveri, Aikaterini (author), Zhang, H. (author), Erkens, S. (author), Scarpas, Athanasios (author), Leng, Zhen (author)Considering the application scenarios of rubber granules from waste tires in the bitumen modification process (wet or dry process), both aerobic and anaerobic aging of rubber may occur. The current study aims to investigate the thermal aging behavior of waste tire rubber samples using nanoindentation and environment scanning electron microscopy ...journal article 2021
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Jing, R. (author), Varveri, Aikaterini (author), Liu, X. (author), Scarpas, Athanasios (author), Erkens, S. (author)The degradation of bituminous materials as a result of ageing has a significant effect on asphalt pavement performance. In this study, one porous asphalt (PA) section and one stone mastic asphalt (SMA) asphalt pavement section were designed and constructed in 2014 and exposed to the actual environmental condition. To study the change in the...journal article 2021
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Ma, L. (author), Varveri, Aikaterini (author), Jing, R. (author), Erkens, S. (author)Oxidative ageing and moisture damage are key factors in bitumen degradation and asphalt pavement deterioration. The effects of oxygen and moisture on bitumen are governed by their transport and reaction processes. This paper provides an overview of theories and concepts developed to describe the kinetics, thermodynamics and mechanisms of...journal article 2021
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Varveri, Aikaterini (author), Jing, R. (author), Tarsi, G. (author), Erkens, S. (author)Moisture sorption can significantly influence hydrothermal ageing and alter the chemical and rheological properties of bituminous mastics. Mineral filler particles are added to bituminous binders to form mastics with increased stiffness. The addition of fillers can considerably change the moisture sorption and the physico-chemical properties...journal article 2021
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