Searched for: author:"Liu, X."
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Liu, X. (author)
Railway crossings are essential components of the railway track system that allow trains to switch from one track to another. Due to the complex wheel-rail interaction in the crossing panel, crossings are vulnerable elements of railway infrastructure and usually have short service lives. The crossing damage not only results in substantial...
doctoral thesis 2020
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Ren, S. (author), Liu, X. (author), Wang, H. (author), Fan, Weiyu (author), Erkens, S. (author)
Recycling technology is widely used in the asphalt road construction due to its environmental and economic effects. Many efforts have focused on the performance restoration of aged base asphalt by adding light oil, but the possibility of recycling the aged asphalt using low-viscosity asphalt and polymers has been few explored. Therefore, the...
journal article 2020
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Wang, H. (author), Liu, X. (author), Apostolidis, P. (author), Erkens, S. (author), Scarpas, Athanasios (author)
Rubber swelling in bitumen, which is a diffusion-induced volume expansion process, plays a dominant role in the design of crumb rubber modified bitumen binders and their properties development. This study aims to investigate the kinetics of bitumen diffusion into truck tire rubber, the equilibrium swelling characteristics of rubber, and the...
journal article 2020
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Liu, G. (author), Zhang, Ya (author), Liu, X. (author), Hammes, Frederik (author), Liu, Wen Tso (author), Medema, G.J. (author), Wessels, Peter (author), van der Meer, W.G.J. (author)
In the present study, triplicate rings of 360° pipe surfaces of an operational drinking water distribution pipe were swabbed. Each ring was equally divided into 16 parts for swabbing. The collected swabs were grouped into 3 sections and compared with the biofilm samples sampled by sonication of specimens from the same pipe. The results showed...
journal article 2020
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de Beurs, A. C.C. (author), Liu, X. (author), Jansen, G. (author), Konijnenberg, A.P. (author), Coene, W.M.J.M. (author), Eikema, K. S.E. (author), Witte, S. (author)
We report on a method that allows microscopic image reconstruction from extreme-ultraviolet diffraction patterns without the need for object support constraints or other prior knowledge about the object structure. This is achieved by introducing additional diversity through rotation of an object in a rotationally asymmetric probe beam,...
journal article 2020
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Wang, H. (author), Liu, X. (author), Erkens, S. (author), Scarpas, Athanasios (author)
One of the main drawbacks of crumb rubber modified bitumen (CRMB) is the storage stability issue. The storage instability of CRMB impedes its further application. This study aims to develop a robust methodology to evaluate the storage stability of CRMB binders using both mechanical and morphological tests. The effects of rubber contents (0, 5...
journal article 2020
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Wang, H. (author), Yang, Jun (author), Lu, Guoyang (author), Liu, X. (author)
Self-healing of asphalt concrete (AC) is highly dependent on temperature, and its healing capacity increases with elevated temperatures. The main objective of this study is to investigate the effect of microwave heating on promotion of self-healing in AC. With this purpose, two types of AC specimens (neat AC without additives and conductive...
journal article 2020
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Liu, X. (author), Wang, Yuanqing (author), Ban, Huiyong (author), Liu, Ming (author), Veljkovic, M. (author), Bijlaard, F.S.K. (author)
Application of longitudinally profiled (LP) steel plate in the flange of flexural members may provide a good solution to optimize their mechanical performance and to improve the efficiency of steel use, whilst existing design codes provide no design guidance or prediction methodology for such advanced beams in terms of flexural behaviour. To...
journal article 2020
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Apostolidis, P. (author), Liu, X. (author), Erkens, S. (author), Scarpas, Athanasios (author)
Asphalt binders incorporating different modifiers is a common practice but empirically driven in most of the cases. Therefore, the fundamental understanding of modification mechanisms in asphalt binders is needed to design polymer modified binders in a controllable manner, especially today in which new modification technologies are proposed....
journal article 2020
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Wang, H. (author), Liu, X. (author), van de Ven, Martin (author), Lu, Guoyang (author), Erkens, S. (author), Scarpas, Athanasios (author)
Recently warm mix asphalt (WMA) technologies have been introduced to rubberized asphalt mixtures to decrease the required construction temperatures and to alleviate the hazardous gas emissions. Rubberized asphalt pavements combining with WMA have the potential to improve the long-term pavement performance. This study aims to investigate the...
journal article 2020
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Xu, S. (author), Liu, X. (author), Tabakovic, A. (author), Schlangen, E. (author)
Self-healing asphalt, aimed to produce a sustainable asphalt pavement using green technology, has been studied in the past two decades. Technologies including encapsulated rejuvenator and induction heating have been proposed, demonstrated in the laboratory, and gradually evaluated in field application. This paper looks into the synergy effect...
journal article 2020
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Wang, H. (author), Liu, X. (author), Zhang, H. (author), Apostolidis, P. (author), Erkens, S. (author), Scarpas, Athanasios (author)
Crumb rubber modified bitumen (CRMB) can be considered as a binary composite system where rubber particles are embedded in the bitumen matrix. The bitumen-rubber interaction process (mainly swelling) significantly changes the mechanical properties of both bitumen and rubber phases. This study aims to predict the complex moduli of CRMB binders...
journal article 2020
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Yu, M. (author), Wood, Paul (author), van de Giesen, N.C. (author), Liu, X. (author), Li, Qiongfang (author), Wang, Guoqing (author), Zhang, Jianyun (author)
River regulation by the construction of reservoirs represents one of the greatest challenges to the natural flow regime and ecological health of riverine systems globally. The Danjiangkou (DJK) Reservoir is the largest reservoir on the Hangjiang River and commenced operations in 1967. The reservoir was upgraded in 2012 to provide water...
journal article 2020
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Apostolidis, P. (author), Liu, X. (author), Erkens, S. (author), Scarpas, Athanasios (author)
Oxidative aging is responsible for the irreversible asphalt stiffening and embrittlement leading to asphalt pavements of increased susceptibility to fatigue and thermal cracking. In recent years, various flexible binders have been introduced in asphalt industry to produce long-life pavements and the epoxy asphalt binders are among them....
journal article 2020
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Wang, H. (author), Liu, X. (author), Apostolidis, P. (author), van de Ven, Martin (author), Erkens, S. (author), Scarpas, Athanasios (author)
Aging during construction and in-service substantially changes the chemical composition and physical properties of bitumen thereof influences the performance of asphalt pavements. The modification of bitumen by crumb rubber modifier (CRM) significantly increases the complexity of the aging mechanism and is expected to improve the aging...
journal article 2020
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Liu, X. (author), Markine, V.L. (author)
This paper presents the investigation of the root causes of the fast degradation of a railway crossing. The dynamic performance of the crossing was assessed using the sensor-based crossing instrumentation, and the measurement results were verified using the multi-body system (MBS) vehicle-crossing model. Together with the field inspections,...
journal article 2020
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Apostolidis, P. (author), Liu, X. (author), Erkens, S. (author), Scarpas, Athanasios (author)
This work presents an experimental program developed to evaluate the effect of epoxy-asphalt binder, used as replacement of bitumen, on the durability and fatigue life of an asphalt concrete mix. The use of epoxy-type binder as tack coat has been explored as well and thus experiments have been conducted to quantify the effect of epoxy tack coat...
journal article 2020
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Ren, S. (author), Liu, X. (author), Li, Mingliang (author), Fan, Weiyu (author), Xu, Jian (author), Erkens, S. (author)
It is well known that crumb rubber (CR) and styrene–butadienestyrene (SBS) composite modified asphalt has better rheological and engineering performance. However, it always presents very poor compatibility and storage stability. Meanwhile, Trans-polyoctenamer (TOR) can effectively improve the compatibility and thermal stability of rubber...
journal article 2020
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Liu, X. (author), Markine, V.L. (author)
This paper presents the development of a multi-body system (MBS) vehicle-crossing model and its application in the structural health monitoring (SHM) of railway crossings. The vehicle and track configurations in the model were adjusted to best match the real-life situation. By using the measurement results obtained from an instrumented...
journal article 2020
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Liu, X. (author), Kasbergen, C. (author), Li, J (author), Scarpas, Athanasios (author), Tzimiris, G. (author)
The adhesive bonding strength of the membrane layers between the asphalt concrete surface layers and the decks of steel bridges has a strong influence on the fatigue life of orthotropic steel deck bridges (OSDBs). The interfacial properties between the membrane and the layers bonded to it have not been extensively studied in the current...
journal article 2020
Searched for: author:"Liu, X."
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