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Effects of moisture damage on asphalt mixtures

Journal of Traffic and Transportation Engineering(English Edition) 2020年第5期7卷 600-628页

作者： Hend Ali Omar nur izzi mdyusoff Muhammad Mubaraki Halil Ceylan Department of Civil Engineering University of TripoliTripoliLibya Department of Civil Engineering Universiti Kebangsaan MalaysiaBangi 43600Malaysia Faculty of Engineering Jazan UniversityJazanKingdom of Saudi Arabia Department of Civil Construction and Environmental EngineeringIowa State UniversityAmesIA 50011USA

The reduction in the ability of bitumen to bond with the aggregate surface due to the infiltration of moisture has been recognised for years, and this deterioration phenomenon is called moisture damage. In general, the loss of bonding between bitumen and aggregate shortens the service life of the top layer of the pavement. Many investigations have been conducted to understand the mechanisms of moisture damage due to the loss of bonding strength between bitumen and aggregate and to find ways to improve and strengthen the bond to mitigate the effect of moisture. This paper reviews the extensive literature on the loss of bitumen-aggregate bonding strength due to moisture damage in asphalt *** general description of the theories and mechanisms that explain the effect of the thermodynamic, chemical, physical and mechanical characteristics of the bitumen and aggregate on the bonding phenomenon are discussed in this paper. In addition, the causes of and contributing factors to moisture damage and methods to improve the bond between bitumen and aggregates are also discussed. Moreover, a description of the test methods that can be used to evaluate moisture damage in poorly bonded and compacted mixtures are also presented. Special attention is given to a well-known method, known as the pulloff test, which has been successfully used to evaluate aggregate-binder bond strength, both for laboratory and in-situ tests. This includes the test methods, the factors that affect the bonding strength results and their correlation with other test method. A review of the failure mode of bitumen under the pull-off loading test is discussed in the final section of this paper.

关键词： Road engineering Bitumen Aggregate Asphalt mixture Moisture damage

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Predicting pavement condition index based on the utilization of machine learning techniques:A case study

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Journal of Road Engineering 2023年第3期3卷 266-278页

作者： Abdualmtalab Abdualaziz Ali Abdalrhman Milad Amgad Hussein nur izzi Md Yusoff Usama Heneash Department of Civil Engineering Faculty of Engineering and Applied ScienceMemorial UniversitySt.John'sNL A1B1T5Canada Department of Civil Engineering Faculty of EngineeringAzzaytuna UniversityTarhunaLibya Department of Civil and Environmental Engineering College of EngineeringUniversity of NizwaNizwaOman Department of Civil Engineering Universiti Kebangsaan MalaysiaBangi 43600Malaysia Department of Civil Engineering Faculty of EngineeringKafrelsheikh UniversityKafr El-SheikhEgypt

Pavement management systems(PMS)are used by transportation government agencies to promote sustainable development and to keep road pavement conditions above the minimum performance levels at a reasonable *** accomplish this objective,the pavement condition is monitored to predict deterioration and determine the need for maintenance or rehabilitation at the appropriate *** pavement condition index(PCI)is a commonly usedmetric to evaluate the pavement's *** research aims to create and evaluate prediction models for PCI values using multiple linear regression(MLR),artificial neural networks(ANN),and fuzzy logic inference(FIS)models for flexible pavement *** authors collected field data spans for 2018 and *** pavement distress factors were considered inputs for predicting PCI values,such as rutting,fatigue cracking,block cracking,longitudinal cracking,transverse cracking,patching,potholes,and *** study evaluates the performance of the three techniques based on the coefficient of determination,root mean squared error(RMSE),and mean absolute error(MAE).The results show that the R2 values of the ANN models increased by 51.32%,2.02%,36.55%,and 3.02%compared toMLR and FIS(2018 and 2021).The error in the PCI values predicted by the ANNmodel was significantly lower than the errors in the prediction by the FIS and MLR models.

关键词： Pavement condition index Pavement distresses Machine learning Artificial neural network Multiple linear regression

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Rheological and physicochemical characteristics of asphalt mastics incorporating lime kiln dust and dolomite powder as sustainable fillers

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Journal of Road Engineering 2023年第1期3卷 98-112页

作者： Najib Mukhtar Mohd Rosli Mohd Hasan Hanizah Osman Zainiah Mohd Zin Khairul Anuar Shariff nur izzi Md.Yusoff Ashiru Sani School of Civil Engineering Universiti Sains Malaysia(Engineering Campus)Nibong Tebal 14300PenangMalaysia Department of Civil Engineering Bayero University KanoKabuga 700241 KanoNigeria School of Materials and Mineral Resources Engineering Universiti Sains Malaysia(Engineering Campus)Nibong Tebal 14300PenangMalaysia Department of Civil Engineering Faculty of Engineering&Built EnvironmentUniversiti Kebangsaan MalaysiaSelangor Darul Ehsan 43600Malaysia Department of Civil Engineering Kano University of Science and TechnologyKano 3244Nigeria

The filler-bitumen interaction mechanism is one of the most essential phases for comprehending the asphalt mixture's ***,despite numerous studies,in-depth knowledge of filler-bitumen reciprocity at a microscale level is yet to be *** goal of this research is to gain a better understanding of the fillerbitumen microscale interaction in terms of the synergy and coaction between the physicochemical and rheological performance of mastics due to filler *** rheological properties of two sustainable mastics,dolomite powder(DP)and lime kiln dust(LKD),together with a neat PEN 60/70 binder,were analysed based on a temperature sweep at elevated temperature ***,frequency sweep and multiple stress creep recovery(MSCR)tests were also conducted at pavement serviceability temperature using the dynamic shear rheometer(DSR).Physicochemical tests using a scanning electron microscope(SEM)and energy dispersive X-rays(EDX)were conducted to analyse the impact of parameters such as particle shape,grain size,texture,and chemical *** DSR test results showcased how the incorporation of fillers in asphalt binder considerably improved the performance of the binder in terms of rutting and ***,its strain and nonrecoverable compliance parameters were substantially reduced at higher filler and binder *** filler attributes of low rigden voids(R.V),high fineness modulus(FM),and high specific surface area(SSA)led to greater interfacial stiffness and elasticity in LKD mastics compared to DP mastics at different loading frequencies and temperature *** SEM/EDX results also indicated that the elemental calcium and carbon composition of each filler component,together with its grain morphology,strongly influenced its rheological performance.

关键词： Asphalt mastics Industrial by-product Waste recycling Sustainable material consumption Rheological behaviour Chemical characterisation

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Tolerance and biosorption of copper (Cu) and lead (Pb) by filamentous fungi isolated from a freshwater ecosystem

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Journal of Environmental Sciences 2011年第5期23卷 824-830页

作者： nur Liyana Iskandar nur Ain Izzati Mohd Zainudin Soon Guan Tan Department of Biology Faculty of Science Universiti Putra Malaysia Department of Biology Faculty of ScienceUniversiti Putra Malaysia Department of Cell and Molecular Biology Faculty of Biotechnology and Biomolecular SciencesUniversiti Putra Malaysia

Filamentous fungi are able to accumulate significant amount of metals from their environment. The potential of fungal biomass as agents for biosorption of heavy metals from contaminated sediments is currently receiving attention. In the present study, a total of 41 isolates of filamentous fungi obtained from the sediment of the Langat River, Selangor, Malaysia were screened for their tolerance and uptake capability of copper （Cu） and lead （Pb）. The isolates were identified as Aspergillus niger, A. fumigatus, Trichoderma asperellum, Penicillium simplicissimurn and P. janthinellum. A. niger and P. simplicissimum, were able to survive at 1000 mg/L of Cu（Ⅱ） concentration on Potato Dextrose Agar （PDA） while for Pb, only A. niger survived at 5000 mg/L concentration. The results showed that A. niger, P. simplicissimum and T. asperellum have a better uptake capacity for Pb compared to Cu and the findings indicated promising biosorption of Cu and Pb by these filamentous fungi from aqueous solution. The present study was also determined the maximum removal of Cu（Ⅱ） and Pb（Ⅱ） that was performed by A. niger. The metal removal which occurred at Cu（Ⅱ） 200 mg/L was （20.910 ＋ 0.581） mg/g and at 250 mg/L of PbⅡ） was （54.046 ± 0.328） mg/g.

关键词： biosorption copper lead Aspergillus niger Penicillium simplicissimum Trichoderma asperellum

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Non-Uniform Doo-Sabin Subdivision Surface via Eigen Polygon

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Journal of Systems Science & Complexity 2021年第1期34卷 3-20页

作者： ALAM Md nur LI Xin School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China

This paper constructs a new non-uniform Doo-Sabin subdivision scheme via eigen *** authors proved that the limit surface is always convergent and is G1 continuous for any valence and any positive knot intervals under a minor assumption, that λ is the second and third eigenvalues of the subdivision matrix. And then, a million of numerical experiments are tested with randomly selecting positive knot intervals, which verify that our new subdivision scheme satisfies the *** this is not true for the other two existing non-uniform Doo-Sabin schemes in Sederberg, et al.(1998), Huang and Wang(2013). In additional, numerical experiments indicate that the quality of the new limit surface can be improved.

关键词： Doo-Sabin non-uniform splines subdivision

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Obesity, fatty liver disease and intestinal microbiota

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World Journal of Gastroenterology 2014年第44期20卷 16452-16463页

作者： nur Arslan Department of Pediatrics Division of Pediatric Gastroenterology Nutrition and Metabolism Dokuz Eylul University Faculty of Medicine Department of Molecular Medicine Dokuz Eylul University Faculty of Medicine

Nonalcoholic fatty liver disease(NAFLD) is a chronic liver disorder that is increasing in prevalence with the worldwide epidemic of obesity. NAFLD is the hepatic manifestation of the metabolic syndrome. The term NAFLD describes a spectrum of liver pathology ranges from simple steatosis to steatosis with inflammation nonalcoholic steatohepatitis and even cirrhosis. Metabolic syndrome and NAFLD also predict hepatocellular carcinoma. Many genetic and environmental factors have been suggested to contribute to the development of obesity and NAFLD, but the exact mechanisms are not known. Intestinal ecosystem contains trillions of microorganisms including bacteria, Archaea, yeasts and viruses. Several studies support the relationship between the intestinal microbial changes and obesity and also its complications, including insulin resistance and NAFLD. Given that the gut and liver are connected by the portal venous system, it makes the liver more vulnerable to translocation of bacteria, bacterial products, endotoxins or secreted cytokines. Altered intestinal microbiota(dysbiosis) may stimulate hepatic fat deposition through several mechanisms: regulation of gut permeability, increasing low-grade inflammation, modulation of dietary choline metabolism, regulation of bile acid metabolism and producing endogenous ethanol. Regulation of intestinal microbial ecosystem by diet modifications or by using probiotics and prebiotics as a treatment for obesity and its complications might be the issue of further investigations.

关键词： Intestinal microbiota Dysbiosis Nonalcoholic fatty liver disease Obesity

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Effect of earth reinforcement,soil properties and wall properties on bridge MSE walls

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Frontiers of Structural and Civil Engineering 2021年第5期15卷 1209-1221页

作者： Zaid MOMANI Eyosias BENEBERU nur YAZDANI Department of Civil Engineering Al-Ahliyya Amman UniversityAmman 19328Jordan Bridgefarmer&Associates DallasTX 75234USA Department of Civil Engineering University of Texas at ArlingtonArlingtonTX 76019USA

Mechanically stabilized earth(MSE)retaining walls are popular for highway bridge *** have precast concrete panels attached to earth *** panels are designed to have some lateral ***,in some cases,excessive movement and even complete dislocation of the panels have been *** this study,3-D numerical modeling involving an existing MSE wall was undertaken to investigate various wall *** effects of pore pressure,soil cohesion,earth reinforcement type and length,breakage/slippage of reinforcement and concrete strength,were *** showed that the wall movement is affected by soil pore pressure and reinforcement integrity and length,and unaffected by concrete *** cohesion has a minor effect,while the movement increased by 13–20 mm for flexible geogrid reinforced walls compared with the steel grid *** steel grid stresses were below yielding,while the geogrid experienced significant stresses without *** reinforcement may be used taking account of slippage resistance and wall *** steel grid is used,non-cohesive soil is recommended to minimize *** soil drainage is important for control of pore pressure.

关键词： mechanically stabilized earth walls precast concrete panels backfill soil finite element modeling earth reinforcement

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The development of ultralightweight expanded perlite-based thermal insulation panel using alkali activator solution

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Frontiers of Structural and Civil Engineering 2022年第11期16卷 1486-1499页

作者： Damla nur CELIK Gökhan DURMUŞ Civil Engineering Department Technology FacultyGazi UniversityAnkara 06500Turkey

The International Energy Agency(IEA)states that global energy consumption will increase by 53%by *** has 70%of the world’s perlite reserves,and in order to reduce energy consumption a thermal insulation panel was developed in Turkey using different particle sizes of expanded perlite(EP).In this study,0–1.18 mm(powder)and 0–3 mm(granular)EP particle sizes were selected,since they have the lowest thermal conductivity coefficients among all the particle *** addition,an alkali activator solution was used as a binder in the *** alkaline activator solution was obtained by mixing sodium hydroxide solution(6,8,10,and 12 mol·L−1)and sodium silicate(Module 3)at the different ratios of Na2SiO3 to NaOH of 1,1.5,2,and *** study aimed to experimentally determine the optimum binder and distribution ratio of EP,with the lowest coefficient of thermal conductivity and the lowest *** lowest thermal conductivity and the lowest density were determined as 0.04919 W·m−1·K−1 and 133.267 kg/m3,respectively,in the sample prepared with 83.33%powder-size EP,6 mol·L−1 sodium hydroxide solution,and ratio of Na2SiO3 to NaOH of *** density,thermal conductivity,and compressive strength of the sample showed the same trends of behavior when the Na2SiO3 to NaOH ratio was *** addition,the highest compressive strength was measured in 12 mol·L−1 NaOH concentration regardless of particle *** conclusion,the study predicts that the EP-based thermal insulation panel can be used as an insulation material in the construction industry according to the TS825 Thermal Insulation Standard.

关键词： expanded perlite alkali activator thermal insulation panel thermal conductivity

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New structures for closed-form wave solutions for the dynamical equations model related to the ion sound and Langmuir waves

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Communications in Theoretical Physics 2021年第3期73卷 1-13页

作者： Md nur Alam M S Osman Department of Mathematics Pabna University of Science and TechnologyPabna6600Bangladesh Department of Mathematics Faculty of ScienceCairo UniversityGiza 12613Egypt Department of Mathematics Faculty of Applied ScienceUnrni Alqura UniversityMakkah 21955Saudi Arabia

This treatise analyzes the coupled nonlinear system of the model for the ion sound and Langmuir *** modified(G'/G)-expansion procedure is utilized to raise new closed-form wave *** solutions are investigated through hyperbolic,trigonometric and rational *** graphical design makes the dynamics of the equations *** provides the mathematical foundation in diverse sectors of underwater acoustics,electromagnetic wave propagation,design of specific optoelectronic devices and physics quantum ***,we concluded that the studied approach is advanced,meaningful and significant in implementing many solutions of several nonlinear partial differential equations occurring in applied sciences.

关键词： the modified(G'/G)-expansion method ion sound wave Langmuir wave closed-form wave solutions

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The study on nuclear level density of some deformed Dy radionuclides using collective model approach

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Nuclear Science and Techniques 2016年第5期27卷 225-230页

作者： Sabahattin Akbas Seref Okuducu Nisa nur Akti Science and Technology Application and Research Centre Bozok University 66200 Yozgat Turkey Department of Physics Faculty of Science Gazi University 06500 Ankara Turkey Saraykoy Nuclear Research and Training Centre 06983 Ankara Turkey

Nuclear level density(NLD) is a characteristic property of many-body quantum mechanical *** are of special importance to make statistical calculations in reactor studies and various theoretical and experimental nuclear physics and engineering *** this study,we have investigated a set of particle states in distinct rotational and vibrational bands to calculate nuclear level density parameters and the NLDs of accessible states of some deformed Dy radionuclides using a collective model approach,which included different excitation bands of the observed nuclear *** method used assumes equidistant spacing of collective coupled state bands of the considered *** results of the calculated NLD have been compared with the experimental and compiled data obtained by the Oslo group,shell model Monte Carlo,Hartree-Fock-Bogoliubov + combinatorial approach,Bardeen-Cooper-Schrieffer approach and are in a good agreement.

关键词：核能级密度参数放射性核素集体模型变形实验核物理量子力学系统计算结果 Cooper

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