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Oxidative aging of bitumen: a structural and chemical investigation Road Mater. Pavement Design (IF 2.582) Pub Date : 2021-01-13 Xiaohu Lu; Peter Sjövall; Hilde Soenen; Johan Blom; Michalina Makowska
The oxidative aging of bitumen was investigated chemically and structurally using SARA analysis, TOF-SIMS and AFM. Typical wax-containing and non-waxy bitumen samples were selected. Short- and long-term aging tests were conducted under standard conditions, and at prolonged aging times. For both the wax-containing and non-waxy bitumen, aging significantly decreases the aromatic fraction and at the same
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Effect of stress path on mechanical behaviours of frozen subgrade soil Road Mater. Pavement Design (IF 2.582) Pub Date : 2021-01-11 Mingde Shen; Zhiwei Zhou; Shujuan Zhang
This paper presents a systematical investigation on the mechanical behaviours of frozen subgrade soil under various stress paths. A series of triaxial compression tests under six typical linear stress paths were conducted on artificially saturated frozen samples at a temperature of −6.0 °C by using triaxial low-temperature apparatus (MTS-810). The effects of stress path on mechanical behaviours such
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Thermal and mechanical performance of cement concrete pavements containing PVC-glass mix Road Mater. Pavement Design (IF 2.582) Pub Date : 2021-01-11 B. R. Anupam; L. Anjali Balan; Sunil Sharma
Increased pavement temperature leads to urban heat island effect and thermal distress in pavements. The reduction in pavement temperature reduces the risk of thermal cracks in pavements and also contributes to the mitigation of the urban heat island effect. The primary aim of this study is to analyze the effect of incorporating PVC-glass mix on the thermal and mechanical properties of cement concrete
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Analytical methods to determine effectiveness of slurry seals in wet/freeze climate using pavement management information systems Road Mater. Pavement Design (IF 2.582) Pub Date : 2021-01-07 Ashley F. Buss; Benjamin S. Claypool
With increasing economic pressures worldwide, the amount of money spent on pavement preservation needs to become more effectively utilised. Historically, the Long-Term Pavement Performance (LTPP) study has led to data-driven performance expectations for treatments. Pavement management systems (PMS) allowed many to form analytical methods to evaluate pavement performance, from trend fitting to benefit
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Experimental, analytical, and analogical study of the effect of RAP extracted binder on rheology of polymer modified binder Road Mater. Pavement Design (IF 2.582) Pub Date : 2021-01-07 Dharamveer Singh; Burhan Showkat; Shashibhushan Girimath
This study attempts to scrutinise the effect of RAP on Performance Grade (PG), fatigue, and low temperature performance of polymer modified binder (PMB40). Furthermore, analytical, and analogical modelling was conducted. RAP from two sources was blended with PMB40 in proportions of 15%, 25%, and 40%. Thereafter, PG isochronal temperature sweeps, isothermal frequency sweeps and bending beam rheometer
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Strength characterisation of fiber reinforced expansive subgrade soil stabilized with alkali activated binder Road Mater. Pavement Design (IF 2.582) Pub Date : 2021-01-07 Mazhar Syed; Anasua GuhaRay; Divyam Goel
Expansive soil subgrade exhibits low volumetric stability due to moisture imbalance, rendering pavement serviceability loss. In the present study, an effort is made to improve the subgrade strength behavior of expansive soils by combining it with alkali activated binder (AAB) with chemically treated coir (TCF) and hemp fiber (THF). The research also compares the effectiveness of TCF and THF reinforced
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Random generation of 2D PFC microstructures through DEM gravimetric methods Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-30 Laura Manrique-Sanchez; Silvia Caro; Nicolas Estrada; Daniel Castillo; Allex E. Alvarez
Computational mechanics has proven to be a useful method to understand and assess the mechanical behaviour and main degradation mechanisms of Porous Friction Courses (PFC) at the microstructural level. However, a common limitation when preparing these models is the difficulty to achieve realistic microstructures. The ideal model to evaluate the mechanical behaviour and the degradation mechanisms of
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Properties of sustainable polyester concrete pavement with various types of recycled aggregates Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-30 Safaa Adnan Mohamad; Israa Saeed Al-Haydari; Ghadah Ghassan Masood; Hussein Mohammed-Noor Khudhur
ABSTRACT Polyester concrete PC is composed of aggregate, polyester resin as binding material, and fillers when needed. Sustainable polyester concrete pavement SPCP is composed of recycled aggregate, polyester resin as binding material, and fine waste material used as fillers like fly ash. SPCP can be used as rigid pavement construction. Because of its properties like high compressive strength, high
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Utilising fluorescence spectroscopy and optical microscopy to investigate bitumen long-term ageing Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-30 Johannes Mirwald; Bernhard Hofko; Hinrich Grothe
Linking the chemical composition of bitumen to its microstructure is challenge due to its complexity, viscoelasticity and sensitivity to high energy input. Therefore, fluorescence spectroscopy combined with fluorescence microscopy are promising tools, as they are capable to link the materials fluorescence behaviour to its respective microstructural features. Herein, these techniques were coupled with
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A critical review of vehicle-pavement interaction mechanism in evaluating flexible pavement performance characteristics Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-24 Gauri R. Mahajan; B. Radhika; Krishna Prapoorna Biligiri
This paper presents a review of investigations that recognised the effect of vehicle-pavement interaction (VPI) mechanism in estimating flexible pavement performance criteria. This state-of-the-art review highlights the importance of dynamic traffic loads illustrated through vehicular models that have potential in simulating realistic field conditions in the mechanistic pavement design process. Furthermore
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Investigation on rheological properties of bitumen based on rheological parameters of maltenes Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-24 Chao Yang; Juan Wang; Jun Xie; Shaopeng Wu; Serji Amirkhanian; Fusong Wang; Lei Zhang; Jie Hu
ABSTRACT Previous research studies have indicated that each bituminous component plays a different role in rheological properties of bitumen. However, a few literature studies focus on rheological parameters of bitumen at component level. This paper aims to investigate the intuitive influence of rheological parameters of maltenes on rheological properties of bitumen. Saturates, aromatics, resins and
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Quantification of re-refined engine oil bottoms (REOB) in asphalt binder using ATR-FTIR spectroscopy associated with partial least squares (PLS) regression Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-24 Chuanqi Yan; Weidong Huang; Jing Xu; Huaguang Yang; Yuan Zhang; Hussain U. Bahia
Re-refined Engine Oil Bottoms (REOB) has been used in recycled asphalt materials for flexible pavements in recent decade, due to its effects on softening aged binder and relatively low cost. However, concerns on the pavement performance of those materials including REOB in asphalt binders have been reported and linked to the use of REOB. Consequently, methods for detecting and quantifying REOB in asphalt
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Mix design and performance evaluation of coloured slurry seal mixture containing natural iron oxide red pigments Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-21 Amir Izadi; Mahdi Zalnezhad; Pourya Bozorgi Makerani; Hossein Zalnezhad
The use of durable coloured surface treatment can be one of the best cost reduction strategies for road maintenance. The purpose of this study was to investigate the feasibility of applying natural iron oxide red pigments in a slurry seal mix design in order to change the colour of this type of asphalt and evaluate its performance. In this regard, first, the physical and chemical properties of the
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Interlaboratory study on low temperature asphalt binder testing using Dynamic Shear Rheometer with 4 mm diameter parallel plate geometry Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-12-02 Johannes Büchner; Michael P. Wistuba; Ondrej Dasek; Matthias Staschkiewicz; Hilde Soenen; Adam Zofka; Torsten Remmler
ABSTRACT An interlaboratory study was conducted among 20 European road asphalt laboratories, to screen current test protocols for testing low temperature properties of asphalt binders using a Dynamic Shear Rheometer (DSR) with 4 mm diameter parallel plate geometry. From the comparison of the test protocols for conducting temperature-frequency sweep tests between −30°C and 0°C, and between 0.1 and 10 Hz
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Application of fuzzy logic and grey based Taguchi approach for additives optimization in expansive soil treatment Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-24 Chijioke Christopher Ikeagwuani; Donald Chimobi Nwonu
In this paper, grey relational analysis (GRA) and fuzzy logic were successfully combined with Taguchi optimization method and utilized on multiple quality responses to optimize ternary additives for the improvement of expansive soil properties. The ternary additives included sawdust ash (SDA), quarry dust (QD) and ordinary Portland cement (OPC) additives. Signal-to noise ratios were estimated for each
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Estimation of Reclaimed Asphalt Pavement (RAP) characteristics using simple indicative tests Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-24 Gurunath Guduru; Tejaswini Lakshmi Tavva; Kranthi Kuna
The design of hot recycled asphalt mixes with high RAP content, say more than 25%, as per existing guidelines is complex compared to the conventional Hot Mix Asphalt (HMA) design. This is due to the fact that the mix design requires the properties of bitumen in the RAP material and hence, it involves using solvents to recover the bitumen and testing of the recovered bitumen using sophisticated equipment
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Tire-track resistance performance of acrylic resin emulsion coatings for colored asphalt pavements Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-22 Wen-rui Yang; Kai Zhang; Jiao Yuan; Hui-ying Li; Zhong-min Feng
In this work, the tire-track resistance performance of thermosetting acrylic resin polymers was studied thoroughly for the purpose of removing tire tracks and improving the colour durability of coloured asphalt pavement. The Wilhelmy plate method and sessile drop technique were applied to measure the surface energy of three types of acrylic resin emulsions as well as rubber tires. On the other hand
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Research on the performance of temperature responsive asphalt mixture with thermochromic material Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-18 Bin Yu; Weizhi Peng; Jinzhou Liu; Jiayu Zhang; Wei Li; Qianzhe Hong
The surface temperature of asphalt pavement can be exceedingly high in summer while the heat conserved in the pavement tends to be rapidly lost in winter, which leads to rutting and cracking distresses, respectively. Thermochromic material with its ability to change colour subject to temperature variations, was used in this study to control road surface temperature. Three types of thermochromic materials
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Evaluation of potential applicability of modified solvent deasphalted residue as an asphalt crack sealant Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-18 Jeonghyun Kim; Haneol Jang; Namho Kim
Solvent deasphalted (SDA) residue is produced from the solvent deasphalting process, one of the heavy oil refining processes, and is considered to be more difficult to form or process because more oil is removed than asphalt used as a bituminous material for road pavement. In this study, to evaluate the applicability of the SDA residue as a crack sealant, it was modified with oil, crumb rubber, and
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Mechanical and fracture properties of alkali activated concrete containing different pozzolanic materials Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-18 H. Rooholamini; A. Bayat; F. Kazemian
Environmental considerations have caused the alkali-activated slag (AAS) cements to emerge as a promising sustainable substitute for the ordinary Portland cement (OPC). This study is aimed to the results of some comprehensive experimental researches performed on the AAS concrete with different types of partial replacement of binder including fly ash, silica fume, and red mud in terms of mechanical
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An attempt to quantitatively and qualitatively differentiate the pore structure originating from air naturally present in hardened concretes and introduced by an air-entraining admixture Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-18 Aneta Nowak-Michta
The new generation superplasitcizers affect air-entraining stability and, consequently, the air void characteristics in hardened concrete. As part of research 6 air entrained and 6 non air entrained concretes with a variable water-cement ratio liquefied, using modified polycarboxylates. The air void characteristics in hardened concretes were determined using the automatic RapidAir 457 system according
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Effect of moisture sensitivity on the light stabilisation of demolition materials in pavement bases Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-13 Arul Arulrajah; Alireza Mohammadinia; Hamed Haghighi; Suksun Horpibulsuk
ABSTRACT The water/cement (w/c) ratio plays a critical role in the strength development of stabilised materials. The mechanical and durability properties of pavement materials are affected by the w/c ratio. The high water absorption of construction and demolition (C&D) materials, along with the importance of moisture content in achieving the targeted compaction density for these materials requires
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The composition of the material phase responsible for the self-healing of macro-cracks in asphalt mortar beams Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-11-11 Daniel Grossegger; Alvaro Garcia; Gordon Airey
ABSTRACT Self-healing of asphalt is assumed to be a flow process where bitumen flows into cracks to close them. Hence, the rheological behaviour of bitumen is one of the main factors affecting self-healing together with damage history, healing duration and pressure (external compressive forces or internal thermal expansion). Bitumen-filler interaction influences the flow and it is hypothesised that
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Experimental feasibility study of ethylene-vinyl acetate copolymer (EVA) as cement stabilized soil curing agent Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-29 Bowen Zhang; Wei Jiang; Qingzheng Xu; Dongdong Yuan; Jinhuan Shan; Rong Lu
Loess resources are abundant and widely distributed in the world, but insufficient strength and water-stability cannot meet the requirements of subgrade soil. Ordinary soil reinforcement technology does not apply to loess. This paper provides a theoretical reference for the application of copolymers as soil curing agents in pavement construction and the treatment of loess. The effect of CSS (cement
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Effect of emulsifying agent on rheological properties of bitumen emulsion modified with different techniques of adding SBR latex polymer Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-28 Hassan Ziari; Mahmood Reza Keymanesh; Hossein Zalnezhad
ABSTRACT Improving the characteristics of bitumen emulsion is among important methods for the enhancement of cold asphalt mixture properties. Thus the researchers usually focus on different additives, polymers and also manufacturing methods to improve the quality of bitumen emulsion. Accordingly, in this study, the characteristics of different bitumen emulsions modified by Styrene–Butadiene Rubber
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New theoretical framework for temperature-effect integration into asphalt concrete pavement life prediction with respect to Australian pavement conditions Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-26 Peerapong Jitsangiam; Sarayoot Kumlai; Hamid Nikraz
The aim of this study is to introduce a new theoretical framework for incorporating the effects of temperature fluctuations into current pavement design approaches by using the cumulative damage concept. Until now, the effective temperature (Teff ) concept, which can integrate the effects of seasonal or monthly temperature fluctuations within a given annual temperature into pavement design, has been
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Laboratory investigation of Portland cement concrete paver blocks made with Reclaimed Asphalt Pavement aggregates Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-23 Sumit Nandi; G. D. R. N. Ransinchung
The present study investigates the potential of using Reclaimed Asphalt Pavement (RAP) aggregates for sustainable concrete paver blocks. Using RAP in its as-received state (with stiff asphalt coating, dust impurities, and agglomerated particles) and a higher proportion of coarse aggregates in the paver block mix design were some of the barriers tried to overcome during the experimental investigation
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Characterisation of cement grouted bituminous mixes using marginal aggregates Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-22 Supratim Kaushik; Anjan Kumar Siddagangaiah
This study details the results of a laboratory study conducted to evaluate the properties of cement grouted bituminous mixes (CGBM) prepared with marginal aggregates. A conventional dense-graded bituminous concrete mix was also considered for the purpose of comparison. The CGBM specimens prepared were then evaluated in terms of its strength (Stability and Indirect Tensile strength), Elastic properties
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Performance-related properties of low-volume roads when stabilised with a sustainable anionic polyacrylamide: particle and specimen-levels study Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-21 Romel N. Georgees; Rayya Hassan
This study has been undertaken to investigate the benefit of using a sustainable water-soluble anionic polyacrylamide on different properties of pavement surface materials for low-volume roads. This study is centered on the engineering and physical properties performance at specimen and particle levels of three types of soils ranged from non-cohesive to medium and very cohesive soils. At specimen level
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Application of image analysis tools in Matlab to better estimate the degree of binder coverage in rolling bottles test Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-21 Syed Bilal Ahmed Zaidi; James Grenfell; Gordon Airey; Naveed Ahmad; Imtiaz Ahmed; Ayyaz Fareed; Ahmed Abed
In asphalt mixture, a strong affinity between binder and aggregates is of prime importance, especially under conditions susceptible to moisture damage. Out of various modifiers/additives used in the literature, the hydrated lime (HL) has been reported as most suitable for improving affinity between binder and aggregates. Therefore, this study attempted to quantify the affinity of HL modified mastics
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Development of new performance indices to evaluate the fatigue properties of asphalt binders with ageing Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-19 Runhua Zhang; Jo E. Sias; Eshan V. Dave
This work presents the development of new fatigue performance indices for asphalt binders based on viscoelastic continuum damage (VECD) theory and failure energy. Five plant-produced asphalt mixtures were subjected to three different conditioning levels (short-term ageing during production and loose mix ageing for 5 and 12 days at 95°C in the laboratory) and the corresponding binders were extracted
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A revised relationship between molecular weight and reduced angular frequency in δ-method applied to unmodified petroleum bitumens Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-19 Giacomo Cuciniello; Sara Filippi; Miriam Cappello; Pietro Leandri; Giovanni Polacco
The δ-method has been developed to estimate molecular weight distributions of bitumens from phase-angle master curves. The method uses a correlation between the cross-over frequency(ωC) and the molecular weight (MW) that was developed from average MW measured by vapour pressure osmometry. This study proposes a revised correlation whose parameters have been calculated from Gel Permeation Chromatography
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Improving fracture and moisture resistance of cold mix asphalt (CMA) using crumb rubber and cement Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-14 Dana Daneshvar; Arash Motamed; Reza Imaninasab
Due to environmental and economic advantages, cold mix asphalt (CMA) can be considered as a good alternative to conventional hot mix asphalt (HMA). Nevertheless, it has inferior performance compared to HMA, so that the application of CMA is not recommended in the surface layer of pavements subjected to high traffic volume and/or regions with very cold or hot climate. Considering the high potential
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Storage stability characterization and improvement of SBS and crumb rubber composite modified asphalt Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-12 Feipeng Xiao; Qidi Zong; Jingang Wang; Jun Chen; Ji Liu
The styrene–butadiene-styrene (SBS) and crumb rubber (CR) composite modified asphalt (SBS/CRMA) possesses favourable mechanical performance but poor storage stability. The purposes of this study are aiming to investigate the changes in storage properties of SBS/CRMA and propose a corresponding improvement approach in the laboratory and further provide a storage guidance for the field application. The
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Evaluation of cracking resistance of healed warm mix asphalt based on air-void and binder content Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-12 Tam Minh Phan; Tri Ho Minh Le; Dae-Wook Park
This paper investigates the effects of air-void and binder content on the cracking mechanism of asphalt concrete by using induction heating. Semi-circular bending test was used to evaluate the cracking resistance of induction asphalt mixture, including fracture energy index, crack velocity, crack resistance index, and flexibility index. Compaction energy index was computed to evaluate the influence
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Thermal characterisation of electroconductive layers for anti-icing and de-snowing applications on roads Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-09 P. Leiva-Padilla; F. Moreno-Navarro; G. R. Iglesias; M. C. Rubio-Gamez
ABSTRACT Heavy snowfall is the most influential factor in the interruption of road vehicular transit during the winter months, sometimes even causing inaccessibility to certain areas. Traditional maintenance strategies address this issue with mechanical solutions combined with the implementation of “de-icing salts”. However, these “de-icing” salts can cause severe damage to the local ecosystem and
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Properties of paving epoxy asphalt with epoxy-terminated hyperbranched polyester Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-09 Peijun Xu; Xiaoming Du; Peiliang Cong; Zhenjun Zhou
ABSTRACT Epoxy asphalt is a high performance pavement material, but the poor toughness of epoxy asphalt at low temperature has limited its utilisation. Hyperbranched polyester (HBP) is a spherical polymer with highly branched structures, which can effectively improve the toughness of epoxy asphalt. However, hydroxyl-terminated HBP would accelerate the reaction rate of epoxy asphalt because of the rapid
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Performance evaluation of BDM/unsaturated polyester resin-modified asphalt mixture for application in bridge deck pavement Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-07 Xiaoli Shi; Hongliang Zhang; Xinde Bu; Gaowang Zhang; Hao Zhang; Haonan Kang
Although epoxy resin-modified asphalt mixture (ERMAM) shows excellent performances as used in bridge deck pavement, its cost is high and low-temperature anti-cracking resistance is poor, so unsaturated polyester resin-modified asphalt mixture (UPRMAM) is proposed to replace ERMAM. However, there is still a great gap in strength between UPRMAM and ERMAM. In this paper, 4,4′-bismaleimidodi-phenylmethane
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Factors influencing the demulsification time of asphalt emulsion in fresh cement emulsified asphalt composite binder Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-07 Baoju Liu; Jinyan Shi; Yitian He; Yuanxia Yang; Junyi Jiang; Zhihai He
Emulsified asphalt as an indispensable raw material for high-speed railway ballastless slab track and pavement structure is subjected to different combinations of material and construction parameters leading to uncontrollable demulsification time. By examining the demulsification time of cationic emulsified asphalt mixed with cement or cement and sand, the factors influencing the demulsification time
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Three-dimensional numerical modelling of railway track with varying air voids content bituminous subballast Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-07 Talita de Freitas Alves; Paulo André Moraes Pereira; Rosângela Motta; Kamilla Vasconcelos; Jamilla Lutif Teixeira; Liedi Bernucci
The use of bituminous subballast (BS) in railways has gained importance due to structural and geometrical enhancing properties of these infrastructures. Oftentimes, during renovations the paving quality control of bituminous mixtures is compromised due to reduced time span. To verify the effects of significant air voids content variation on the mechanical response of railway tracks, this paper performed
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Role of mineral filler in asphalt mixture Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-07 Yu Chen; Shibing Xu; Gabriele Tebaldi; Elena Romeo
Mineral filler, fine-grained mineral particles naturally present in or manufactured and added to aggregates play a significant role on the performance of asphalt mastic and asphalt mixtures. A clear understanding of effects of filler on the properties of asphalt paving mixtures is critical to ensure a good asphalt mixture design and its field performance. In this study, the basic properties of mineral
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Performance characteristics of asphalt mixtures with industrial waste/by-product materials as mineral fillers under static and cyclic loading Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-07 Ahmed M. Awed; Eman W. Tarbay; Sherif M. El-Badawy; Abdelhalim M. Azam
The mineral filler is an integral constituent of asphalt mixture, which affects its performance. This research investigates the effect of using four local industrial waste/by-product materials (marble, granite, steel slag and hydrated lime powder) as mineral fillers on asphalt mixtures characteristics. The detailed performance of these materials as well as asphalt binder and asphalt mixture characteristics
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Alteration of initial and residual healing potential of asphalt binders due to aging, rejuvenation, and polymer modification Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-06 Babak Asadi; Nader Tabatabaee
Asphalt binders are known to exhibit an inherent ability to repair damage. Such self-healing potentially affects the fatigue damage performance of bituminous materials. There are contradicting findings about the effects of aging and polymer modification on healing. The effectiveness of rejuvenating agents also has not been sufficiently addressed. In the present study, three healing indices have been
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The behaviour of rejuvenated SBS-modified asphalt incorporating catalytic-reactive compounded rejuvenator Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-06 Chuanwen Wei; Henglong Zhang; Haihui Duan
ABSTRACT A novel catalytic-reactive compounded rejuvenator containing aromatic oil (AO), epoxidised soybean oil (ESO) and triphenyl phosphine (TPP, catalyst) was developed to rejuvenate aged SBS-modified asphalt (SBSMA).Three types of rejuvenator (AO, AO/ESO, AO/ESO(TPP)) were employed to rejuvenate long-term aged SBSMA. The results show that 10 wt% AO can obviously improve the physical properties
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Influence factors of strength and performance of foamed asphalt cold recycled mixture Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-06 Pengjian Cheng; Junyan Yi; Zhuo Chen; Hai Luan; Decheng Feng
This paper investigates the factors that influence the strength and moisture damage resistance of foamed asphalt cold recycled mixtures. The relevant factors include gradation, asphalt penetration, mixing temperature, particle size of virgin aggregates, and the curing time and moisture content. Indirect tensile strength (ITS) tests under dry and wet conditions were conducted to evaluate the mixture
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Do all rejuvenators improve asphalt performance? Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-05 Amirul I. Rajib; Alireza Samieadel; Ali Zalghout; Kamil E. Kaloush; Brajendra K. Sharma; Elham H. Fini
Reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) contain significant amounts of bitumen and their application in new constructions have been promoted as a sustainable practice in the pavement industry and to promote circular economy. However, this effort has faced challenges such as the aged bitumen’s inferior properties compared to the virgin counterpart and its unknown contribution
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Application of the discrete element method and CT scanning to investigate the compaction characteristics of the soil–rock mixture in the subgrade Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-05 Xiaoping Ji; Bo Han; Jianming Hu; Shouwei Li; Yue Xiong; Enyong Sun
The soil–rock mixture (SRM) usually contains a large amount of gravels exceeding 40 mm in size, so the traditional laboratory method cannot directly test its maximum dry density (MD), making it difficult to evaluate the compaction degree of the SRM subgrade during construction. In this paper, a numerical simulation method of the vibration compaction method for the SRM (NSM-VCM) was developed based
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Evaluation of effects of soybean derived oil and aggregate petrology on the performance of asphalt mixes Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-05 Muhammad Akhtar Tarar; Ammad Hassan Khan; Zia ur Rehman
The realistic prediction of long term performance of hot mix asphalt (HMA) has been a challenging task for the pavement industry. This study aims to investigate the effect of soybean derived oil and aggregate petrology on the HMA performance. The properties of HMA were evaluated using Superpave gyratory compactor (SGC), indirect tensile (IDT) strength, dynamic modulus and semicircular bend (SCB) tests
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Using artificial neural networks to predict the 28-day compressive strength of roller-compacted concrete pavements containing RAP aggregates Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-10-01 Solomon Debbarma; G. D. Ransinchung R.N.
This paper presents an Artificial Neural Network (ANN) model to predict the 28-day compressive strength of roller-compacted concrete pavement (RCCP) mixes containing reclaimed asphalt pavement (RAP) aggregates. Three supervised learning ANN algorithms, namely, Levenberg–Marquardt (LM), Bayesian Regularisation (BR), and Scaled-Conjugate Gradient (SCG) were used to predict the 28-day compressive strength
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Evaluating fatigue performance of fine aggregate matrix mixes with reclaimed asphalt pavement and rejuvenating agents Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-29 Liya Jiao; Mohamed Elkashef; David Jones; John T. Harvey
In this study, the fatigue performance of asphalt mixtures with high reclaimed asphalt pavement (RAP) content and rejuvenating agents (RA) has been investigated at the level of fine aggregate matrix (FAM) mix. Fatigue tests were conducted on four mixes: FAM without RAP, FAM with 25% RAP binder replacement, FAM with 25% RAP and two types of rejuvenators. Both the linear amplitude sweep (LAS) and conventional
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Performance comparison of warm mix asphalt for plateau area Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-29 Enhui Yang; Jiaqiu Xu; Haoyuan Luo; Bing Huang; Kelvin C. P. Wang; Joshua Qiang Li; Yanjun Qiu
The warm mix asphalt (WMA) technology is commonly applied for highway pavements in high-altitude plateau regions in China, where extreme weather conditions are common. The study is to evaluate the performance of WMA with different additives in the areas. The tests show that all the additives could reduce the viscosity of asphalt binder to reduce the mixing and compacting temperature of asphalt mixture
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Effect of waste plastic and crumb rubber on the thermal oxidative aging of modified bitumen Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-27 Boubaker Fethiza Ali; Khedoudja Soudani; Smail Haddadi
In this work, we study the contribution of crumb rubber (CR) and waste plastic (WP) to improve the thermal-oxidative bitumen aging resistance in short and long terms. All binders were exposed to short-term aging using RTFOT test (Rolling Thin Film Oven Test) and long-term aging using PAV test (Pressure Aging Vessel). The bitumen aging was characterised using physical and rheological tests such as penetration
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Consequences of aircraft operating conditions at military airbases: degradation of ordinary mortar and resistance mechanism of acrylic and silica fume modified cement mortar Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-23 Sukanta Kumer Shill; Safat Al-Deen; Mahmud Ashraf; M. G. Rashed; Wayne Hutchison
Concrete pavements at military airbases are often subjected to extreme aircraft operating conditions such as exposure to high thermal shocks and hydrocarbon fluids, which cause premature degradation and loss of strength. As part of this research project, we replicated aircraft operating circumstances, and investigated their consequences on plain cement mortar as well as on a special type of cement mortar
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Rheological, spectroscopic and microscopic assessment of asphalt binder ageing Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-23 Ayse Koyun; Johannes Büchner; Michael P. Wistuba; Hinrich Grothe
Asphalt binder ageing leads to significant changes in mechanical and physicochemical properties and often to premature cracking in asphalt pavements. A polymer-modified asphalt binder is repeatedly aged through laboratory techniques, i.e. rolling thin film oven test and pressure ageing vessel. The resulting properties of the aged binder are analysed using dynamic shear rheometer, Fourier transform
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Ultrasonic inspection of asphalt pavements to assess longitudinal joints Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-22 Antonin du Tertre; Ahmet Serhan Kırlangıç; Giovanni Cascante; Susan L. Tighe
Longitudinal joints existing in between the lanes of asphalt pavements may initiate deterioration. Traditionally, core density, deflection, and nuclear density tests are used for the quality control. However, such techniques may not suit to the surface at the joints to assess their condition. Alternatively, the ultrasonic surface wave (USW) methods have the potential to both assess the longitudinal
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Predicting rutting performance of asphalt mixture from binder properties and mixture design variables Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-18 Chuanqi Yan; Yuan Zhang; Hussain U. Bahia
Rutting is one of the main asphalt pavement distresses, and it is believed that binder properties play an important role in mixture’s potential rutting resistance. Generally, in the Superpave design system asphalt binder is selected based on the binder PG grade required for the climate. However, to implement performance control through the traditional Superpave PG system during mix design faces more
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Indirect tensile test as a simple method for rut resistance evaluation of asphalt mixtures – Polish experience Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-18 Piotr Zieliński
To assess the resistance of asphalt mixes to permanent deformations, the wheel tracking tests are frequently used, what requires specialized equipment as well as relatively large size samples. For this reason, researchers are seeking for a more simple test that will help to assess the rut resistance of asphalt mixes. According to Christensen and Bonaquist as well as Zaniewski and Srinivasan, this may
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Evaluation of layer coefficient ratios for geogrid-reinforced bases of flexible pavements Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-02 G. Narendra Goud; B. Ramu; B. Umashankar; S. Sireesh; M. R. Madhav
The benefit of reinforcement in pavement sections can be quantified in terms of Layer Coefficient Ratio (LCR). In the present study, a series of Large-Scale Model Experiments (LSMEs) were conducted to quantify the LCRs considering unreinforced and geogrid-reinforced base layers overlying soft to stiff subgrades. Based on extensive LSME testing of reinforced base layers, LCRs were found to range from
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Shear strength of polypropylene fibre reinforced clay Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-09-01 Chunpeng Han; Yulong He; Jiayi Tian; Jian Zhang; Jianhua Li; Shaoquan Wang
Addition of fibres has been recently studied as an effective method to enhance soil. To investigate the reinforcing effect of fibres on the shear strength of soil, polypropylene fibres are added into clay sample and the shear strength of clay is measured. Four different fibre contents and fibre lengths are used. The experimental results indicate that fibre content of 0.3% and fibre length of 9 mm is
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Development of a multi-stage semi-circle bending cyclic test to evaluate the cracking resistance of asphalt mixtures Road Mater. Pavement Design (IF 2.582) Pub Date : 2020-08-27 Hamza Alkuime; Emad Kassem; Fouad M. Bayomy; Richard J. Nielsen
This study aimed to develop, evaluate, and validate a new cyclic cracking assessment test that has advantages over the available monotonic and cyclic cracking assessment tests. Also, it addresses the major concerns related to the implementation of the Balanced Mix Design (BMD) such as long specimen preparation and testing time and the validity of cracking performance assessment tests. The laboratory
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