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Material Sputtering with a Multi-Ion Species Plasma Focused Ion Beam Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-13 Valerie Brogden; Cameron Johnson; Chad Rue; Jeremy Graham; Kurt Langworthy; Stephen Golledge; Ben McMorran
Focused ion beams are an essential tool for cross-sectional material analysis at the microscale, preparing TEM samples, and much more. New plasma ion sources allow for higher beam currents and options to use unconventional ion species, resulting in increased versatility over a broader range of substrate materials. In this paper, we present the results of a four-material study from five different ion
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Optimization of Surface Roughness in Drilling Medium-Density Fiberboard with a Parallel Robot Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-12 Elmas Aşkar Ayyıldız; Mustafa Ayyıldız; Fuat Kara
This study focuses on the examination of the effect of cutting parameters on surface roughness when drilling medium-density fiberboard (MDF) with a parallel robot. Taguchi technique was applied to find the optimum drilling parameters and, later, the drilling processing. Experimental layout was established using the Taguchi L18 orthogonal array, and experimental data were examined via a statistical
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Effect of Cyclic Cryogenic Treatment on Wear Resistance, Impact Toughness, and Microstructure of 42CrMo Steel and Its Optimization Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-12 Haidong Zhang; Xianguo Yan; Qiang Hou; Zhi Chen
Cyclic cryogenic treatment, a major cycle accompanied by zero or more subsidiary cycles, was conducted on the hardened 42CrMo steel using orthogonal design method to investigate the effect of different parameters (cryogenic temperature, holding time, and cycles number) of cryogenic treatment on wear resistance and impact toughness of the steel. Range analysis was performed to obtain the influencing
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Effect of Sodium Aluminate Dosage as a Solid Alkaline Activator on the Properties of Alkali-Activated Slag Paste Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-06 Bin Chen; Jun Wang; Jinyou Zhao
Extensive research into alkali-activated slag as a green gel material to substitute for cement has been done because of the advantages of low-carbon dioxide emissions and recycling of industrial solid waste. Alkali-activated slag usually has good mechanical properties, but the too fast setting time restricted its application and promotion. Changing the composition of alkaline activator could optimize
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Effect of Dry-Wet Cycles and Freeze-Thaw Cycles on the Antierosion Ability of Fiber-Reinforced Loess Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-06 Changgen Yan; Ning An; Yachong Wang; Weifeng Sun
Compared with plain soil, polypropylene (PP) fiber-reinforced soil has markedly improved mechanical properties and can be used in slope protection projects. To investigate the reduction law of the antierosion ability parameters of PP fiber-reinforced loess under dry-wet (D-W) cycles and freeze-thaw (F-T) cycles, we took loess from Yan’an, China, mixed them with PP fiber, and did shear strength tests
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Failure Mode Analysis of Carbon Fiber Composite Laminates by Acoustic Emission Signals Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-05 Xinye Liu; Xinyue Yao; Jinhui Cai; Jiusun Zeng; Wingkong Chiu
Composite laminates have complex failure modes. In order to investigate the evolution of failure in the composite laminates, this paper performed an experimental study on four laminates with different layups using acoustic emission (AE) technique. Two different kinds of defects are imposed on the laminates, including a hole and a crack in the center. Tensile and bending tests are performed on the defective
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Constitutive Characteristics, Microstructure, and Texture Evolution of As-Cast 42CrMo Alloy in Nonisothermal Multipass Compression Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-05 Fangcheng Qin; Huiping Qi; Chongyu Liu; Haiquan Qi; Zhengbing Meng
The nonisothermal multipass deformation behavior of as-cast 42CrMo alloy was studied with declining temperature, constant pass strain, varying strain rate, and interval time. The stresses are used to develop the constitutive model. As the finishing temperature increases from 990°C to 1070°C, the stress decreases gradually and the softening effect increases, which results in a large grain size and inhomogeneous
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Evaluation of the Physical and Adhesive Properties of Natural Weathering Asphalt Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2021-01-02 Yanzhu Wang; Xudong Wang; Xingye Zhou; Guang Yang; Lei Zhang
Asphalt suffers from a series of aging processes in the natural environment. This is a significant factor in asphalt pavement diseases. Research of the properties of the decay processes in the natural weathering of asphalt will be helpful in distinguishing the characteristics of the various types of asphalt and in the selection of pavement materials. Neat asphalt A70, a styrene-butadiene-styrene- (SBS-)
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Effect of Internal Curing with Superabsorbent Polymers on Bond Behavior of High-Strength Concrete Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-31 Xiao Lei; Rui Wang; Hanwan Jiang; Faxiang Xie; Yanni Bao
High-strength concrete (HSC) is widely used in engineering due to its high strength and durability. However, because of its low water-to-cement ratio, external curing water hardly enters the dense internal structure of HSC so that high self-desiccation shrinkage often takes place. As a result, superabsorbent polymers (SAP) are added as an internal curing material to effectively reduce the shrinkage
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Review of Experimental Studies on Application of FRP for Strengthening of Bridge Structures Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-30 Wenliang Hu; Yuan Li; Haoyun Yuan
In recent years, fiber-reinforced polymer (FRP) composites have been widely used as a new type of high-performance material in concrete structures. FRP composites have the advantages of high strength, light weight, and corrosion resistance. Based on existing studies in the literature, this paper reviews the development and applications of FRP materials for the strengthening and rehabilitation of bridge
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Rural Masonry Isolating Structure and LRB Experiment: Seismic Resistance Properties and Statistical Data Curve Analyses Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-29 Jiayao Zheng
The low masonry structure is the most commonly applied building type in rural China. It is possible to install small-diameter, low cost, and easily constructed laminated rubber bearing (LRB) components. Isolation technology has broad application prospects in rural buildings. We developed a small-diameter LRB in this study wherein the isolation layer is set above the floor for easy installation and
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Effects of Sand Powder on Sulfuric Acid Resistance, Compressive Strength, Cost Benefits, and CO2 Reduction of High CaO Fly Ash Concrete Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-28 Surachet Wanna; Warangkana Saengsoy; Pisanu Toochinda; Somnuk Tangtermsirikul
This article studies the efficiency of sand powder as a supplementary cementitious material (SCM) in improving the sulfuric acid resistance of concrete incorporated with high CaO fly ash. Besides, the effects of sand powder on compressive strength development, mitigation of carbon dioxide emission, and cost-effectiveness are addressed. Paste mixtures with W/B ratios of 0.25 and 0.40 were used in this
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Influence of Particle Orientation on the Performance of Geogrid Reinforced Ballast Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-28 Jian-bin Zhao; Jie Li; Xiao-hong Bai; Chen-xi Miao; Jun Zhang
To explore the initial orientation effect of ballast assembly on the reinforcement performance of the geogrid reinforced ballast, particles with random orientation and five prescribed rotational orientations were developed through particle flow code (PFC3D). The evolution laws of the pullout force and the principal directions of the normal contact force were systematically compared and analyzed. Furthermore
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Rolling Bearing Fault Diagnosis Based on Stacked Autoencoder Network with Dynamic Learning Rate Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-28 Hong Pan; Wei Tang; Jin-Jun Xu; Maxime Binama
Fault diagnosis is of great significance for ensuring the safety and reliable operation of rolling bearing in industries. Stack autoencoder (SAE) networks have been widely applied in this field. However, the model parameters such as learning rate are always fixed, which have an adverse effect on the convergence speed and accuracy of fault classification. Thus, this paper proposes a dynamic learning
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Axial Compression Behaviors of the Steel Tube Confined Reinforced Concrete Columns with Binding Bars Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-28 Hao Hu; Zhengliang Li; Xi Tu; Junfeng Tang
An experimental study on the steel tube confined reinforced concrete (STCRC) column with binding bars under axial compression is conducted. The bearing capacity and failure modes are obtained. It can be known that the axial deformation of concrete occurred under compression. The core concrete is wrapped and constrained by the steel tube wall, and the steel tube wall is constrained by binding bars locally
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Enhanced Mechanical Properties of Mg-6Sn-3Al-1Zn Alloy with Bimodal Grain Size Disturbed in the Microstructure Uniformly through Changing the Rolling Temperature Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-24 Fuan Wei; Jinhui Wang; Ping Li; Bo Shi
The mechanical properties of Mg-6Sn-3Al-1Zn alloy were enhanced with bimodal grain size disturbed in the microstructure uniformly; the Mg-6Sn-3Al-1Zn alloys were rolled with 60% thickness reduction at different rolling temperatures. The results have shown that the Mg-6Sn-3Al-1Zn alloys are composed of Mg2Sn phase and α-Mg matrix phase. When the rolling temperature was less than or equal to 400°C, with
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Strength Investigation of the Silt-Based Cemented Paste Backfill Using Lab Experiments and Deep Neural Network Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-24 Chongchun Xiao; Xinmin Wang; Qiusong Chen; Feng Bin; Yihan Wang; Wei Wei
The cemented paste backfill (CPB) technology has been successfully used for the recycling of mine tailings all around the world. However, its application in coal mines is limited due to the lack of mine tailings that can work as aggregates. In this work, the feasibility of using silts from the Yellow River silts (YRS) as aggregates in CPB was investigated. Cementitious materials were selected to be
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Chloride Diffusion and Induced Reinforcement Corrosion in Concrete with Fly Ash and Ground-Granulated Blast-Furnace Slag Exposed to Marine Submerged Zone1 Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-23 Rui Zhao; Zuquan Jin; Guangyan Feng; Jianqiang Li
This paper investigates the influence of mineral admixtures fly ash (FA) and ground-granulated blast-furnace slag (GGBS), the byproducts of industry, on chloride ions migration and corrosion resistance performance. A novel preparation method of wire beam electrode (WEB) was also introduced to explore the excellent corrosion-resistant capacity of concrete with mineral admixtures. By comparing concrete
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Water Distribution in Reconstructed Soil of Nonmetal Mines and the Ecological Effect in Xinjiang, China Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-23 Zizhao Zhang; Xiaoli Guo; Qianli Lv; Ruihua Hao; Zezhou Guo; XueBang Huang; Zekun Guo
Because of the arid climate and fragile ecological environment in Xinjiang, China, land reclamation should be carried out after mining. The core of land reclamation is the water content of the surface covering soil. In this paper, the law of water distribution in reclamation reconstructed soil of nonmetal mines in Xinjiang was studied. In order to obtain the law of water distribution in reconstructed
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Optimization of Exothermic, Foaming, and Mechanical Properties of Modified Polyurethane as Filling Material for Goaf Sealing Wall Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-23 Jianjun Shen; Baihui Ren; Weitao Liu; Chuanpeng Gao; Yingying Hu; Qing Cao
Goaf sealing wall is set in the roadway close to the stop line of working face in an underground coal mine. However, the sealing wall is prone to crack or fracture under serious mining stress, resulting in water and air leakage from goaf. In this study, the combination of polymethylene polyphenyl polyisocyanate (PAPI) and methylene diphenyl diisocyanate (MDI) as component A and polyether polyols, catalysts
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Room-Temperature Polyol Synthesis of Ag/SiO2 Nanocomposite as a Catalyst for 4-Nitrophenol Reduction Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-23 Canh Minh Thang Nguyen; Vinh Tien Nguyen
We prepared silver nanoparticles (AgNP) embedded in SiO2 using a green polyol approach by conducting the synthesis at ambient temperature and pH. Glycerol solutions of SiO2 and silver nitrate were stirred overnight at room temperature. UV-vis spectra and TEM images of the reaction dispersion and XRD patterns of the centrifuged solid confirmed formation of AgNP (6 ± 2 nm) were embedded in SiO2. AAS
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Research on the Influence of Nanocarbon/Copolymer SBS/Rubber Powder Composite Modification on the Properties of Asphalt and Mixtures Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-23 Wenhui Zhao; Xiangbing Xie; Guanghui Li; Jiuguang Geng; Meng Bao; Mingwei Wang
To expand the application range of modified asphalt and mixtures and effectively reduce the aggregation of nanomaterials in asphalt, nanocarbon/styrene butadiene styrene (SBS)/rubber powder composite-modified asphalt is proposed. This paper presents a laboratory study on the performance of nanocarbon/copolymer SBS/rubber powder composite-modified asphalt, and nanocarbon particles modified by titanate
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Numerical Simulation of Conical Pick Cutting Arc Rock Plate Fracture Based on ANSYS/LS-DYNA Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-23 Zhiwen Wang; Qingliang Zeng; Zhenguo Lu; Lirong Wan; Xin Zhang; Guanshun Gao
The new method of rock breaking based on the combination of circular sawblade and conical pick was proposed to improve the effectiveness of hard rock breaking. The numerical simulation method was applied to research the conical pick cutting arc rock plate by ANSYS/LS-DYNA. The conical pick cutting arc rock plate numerical simulation model was established to research the influence of arc rock plate
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Real-Time Evaluation of Compaction Quality by Using Artificial Neural Networks Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-23 Weidong Cao; Shutang Liu; Xuechi Gao; Fei Ren; Peng Liu; Qilun Wu
The primary goal of this study is to find an easy and convenient way to estimate the degree of compaction in real time for compaction quality control. In this paper, an artificial neural network classifier is developed to identify the different characteristic patterns of drum vibration and classify them according to the different compaction levels. At first, a field compaction experiment is designed
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Study on Stress Distribution Law of High-Efficiency Paste Backfilling Working Face with Solid Waste in Thick Coal Seam Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-22 Meng Zhang; Dan Fang
The high-efficiency paste backfilling mining technology of solid waste in thick coal seam above 6 m is a complex system engineering, which involves mining, backfilling, supporting, subsidence, safety, and other aspects, so it is of great strategic significance to study the technology. In this paper, on the basis of comprehensive research methods such as laboratory experiments, theoretical analysis
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Influence of Blade Profiles on Plastic Centrifugal Pump Performance Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-22 Hui Zhang; Lingfeng Tang; Yongtao Zhao
To study the influence of blade profiles of the plastic centrifugal pump on pump performance, the impeller blade profiles were designed and drawn by the single arc method, double arc method, logarithmic spiral method, and B-spline curve method, respectively, with the known structural parameters.The shape and size of four profiles were drawn, and two-dimensional models and three-dimensional models of
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Analytical Assessment of Internal Stress in Cemented Paste Backfill Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-22 Naifei Liu; Liang Cui; Yan Wang
To analytically describe the internal stress in a fill mass made of granular man-made material (cemented paste backfill, CPB), a new 3D effective stress model is developed. The developed model integrates Bishop effective stress principle, water retention relationship, and arching effect. All model parameters are determined from measurable experimental data. The uncertainties of the model parameters
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Foaming Behavior and Pore Structure Evolution of Foamed Aluminum under the Extrusion Constraint Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-22 Lucai Wang; Yanli Wang; Xiaohong You; Fang Wang
This study evaluates foaming behavior and pore structure evolution of aluminum foam by cross-sectional image processing, which was prepared by the powder compact melting (PCM) method under the constraint. The results revealed that the heating time and the heating rate are the key factors affecting the foaming behavior and pore structure of aluminum foam. The thermal decomposition of the foaming agent
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Dynamic Characteristics of the Rubber-Tailings Mixture Based on Dynamic Triaxial Test Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-19 Huandui Liu; Haiming Liu; Wenyun Ding; Hongtao Xie
The liquefaction of tailings is a common failure mode under earthquake actions. The traditional treatment measures of waste rubber have the disadvantages of environmental pollution and occupying soil resources. The combined treatment of waste rubber and tailings is very likely to have important engineering application and theoretical value, and the dynamic characteristics of the rubber-tailings mixture
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Removal of Pb (II) from Synthetic Solution and Paint Industry Wastewater Using Activated Carbon Derived from African Arrowroot (Canna indica) Stem Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-19 Takele Sime Tessema; Amare Tiruneh Adugna; M. Kamaraj
This study aimed to investigate the potential of Canna indica stem-based activated carbon (CISAC) for the removal of Pb (II) ions from synthetic solution and paint industry wastewater. The effects of pH, initial Pb (II) ion concentration, and adsorbent dose were studied using an aqueous solution prepared using pure lead nitrate (Pb(NO₃)₂) on a batch mode. Dried Canna indica stem (CIS) was carbonized
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Experimental Investigation on Stirring Rate Affecting Bubble Structure of Resin Anchor Agent and Anchoring Strength Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-18 Jiaguang Kan; Yuantian Sun; Yifan Wang; Sen Yang; Peng Wang
The function of a resin anchoring agent is to bond the rock of a borehole wall with the body of the anchor so the anchor can play an effective supporting role. The anchoring effect is related to the performance of the resin anchoring agent used and to the stirring rate applied during the anchor installation process. In this report, the stirring rate of the resin anchoring agent is evaluated and discussed
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Recycled Aggregate Concrete including Various Contents of Metakaolin: Mechanical Behavior Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-17 Khaleel H. Younis; Abdulfattah A. Amin; Hemin G. Ahmed; Shelan M. Maruf
This experimental research investigates the effect of utilizing metakaolin (MK) on the behavior of recycled aggregate concrete (RAC). The RAC incorporates recycled coarse aggregate (RCA) originated from crushing construction and demolition waste. The investigated parameters were RCA and MK contents. Tests of workability and mechanical properties such as compressive strength, splitting tensile strength
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Grain Growth of AZ31 Magnesium Alloy Based on Three-Dimensional Cellular Automata Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-17 Yanfeng Li; Cuirong Liu; Zhibing Chu; Wei Li; Zhisheng Wu; Shan Gao; Wenwu He
Based on the thermodynamic conversion mechanism and energy transition principle, a three-dimensional cellular automata model of grain growth is established from the aspects of grain orientation, grain size distribution, grain growth kinetics, and grain topology. Also, the effect of temperature on the three-dimensional grain growth process of AZ31 magnesium alloy is analyzed. The results show that the
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Solid Particle Erosion of a Limestone Target Surface under Controlled Conditions Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-16 Anna Laura Sanna; Giorgio Pia; Francesco Delogu
This work focuses on the erodent capability of yttria-stabilized zirconia beads impacting on a limestone target surface. The target surface was used as the cap of a hardened steel vial clamped on a SPEX Mixer/Mill 8000. The vial three-dimensional swing results in repeated bead impacts that cause the material removal from the target surface. The mass loss varies linearly with the number of beads, which
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Feasibility of Stabilized Zn and Pb Contaminated Soils as Roadway Subgrade Materials Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-16 Mingli Wei; Hao Ni; Shiji Zhou; Yuan Li
The authors have developed a new binder, KMP, which is made from oxalic acid-activated phosphate rock, monopotassium phosphate (KH2PO4), and reactive magnesia (MgO). This study explores the acid neutralization capacity, strength characteristics, water-soaking durability, resilient modulus, and pore size distribution of KMP stabilized soils with individual Zn, Pb, or coexisting Zn and Pb contaminants
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Physicochemical and Mechanical Characterization of Raffia vinifera Pith Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-16 N. R. Sikame Tagne; T. E. Mbou; O. Harzallah; D. Ndapeu; W. Huisken; D. Nkemaja; E. Njeugna; M. Fogue; J-Y. Drean
In this paper, the physicochemical and mechanical properties of Raffia vinifera pith (RVP) are discussed. Microscopic observations have shown that the structure of the RVP is similar to that of a composite consisting of natural fibers. The effective area ratio of Raffia vinifera (RV) fibers was evaluated along the raffia stem using ImageJ software, and it decreases from the periphery to the center
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Effect of Surface Site Defects on Photocatalytic Properties of BiVO4/TiO2 Heterojunction for Enhanced Methylene Blue Degradation Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-15 Sahar Mansour; Rym Akkari; Semy Ben Chaabene; Mongia Saïd Zina
Combining a super photoresponsive BiVO4 catalyst to the large band gap TiO2 material seems to be a great interest in order to improve the visible-light-driven photodegradation of hazardous pollutants. BiVO4/TiO2 heterojunction composites have been synthesized via a simple one-pot hydrothermal route. Herein, we carefully highlighted the effect of BiVO4 content on the physicochemical and photocatalytic
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Rebound Hammer Test: An Investigation into Its Reliability in Applications on Concrete Structures Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-15 Antonio Brencich; Rossella Bovolenta; Valeria Ghiggi; Davide Pera; Paolo Redaelli
The issue of concrete strength often arises in civil engineering practice, either due to quality control of new constructions or due to the assessment of existing structures. To this aim, one of the most widely spread techniques is the rebound hammer (Schmidt hammer) test, for which calibration is still related to the original Schmidt curve dating back to the early 50’s. In spite of the large amount
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Preparation and Characterisation of Polypyrrole-Iron Oxyhydroxide Nanocomposite as Sensing Material Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-14 Farah Nabila Diauudin; Siti Aminah Mohd Noor; Jahwarhar Izuan Abdul Rashid; Victor Feizal Knight; Wan Md Zin Wan Yunus; Keat Khim Ong; Noor Azilah Mohd Kasim; Safura Taufik; Alinda Samsuri; Intan Juliana Shamsudin; Wahhida Latip
Polypyrrole (PPy) has been widely used as a sensing material in many studies as PPy gives out noticeable reactions towards varieties of vapours of acids, bases, alcohols, alkanes, and chemical warfare agent (CWA) simulants. However, due to dispersion and mechanical properties limitation, PPy in nanoparticles (PPy NPs) has been introduced. The combinations between PPy NPs and nanosized metal oxide have
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Lightweight Threshing Rack under Multisource Excitation Based on Modal Optimization Method Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-14 Haotian Zhang; Zhong Tang; Yu Li; Xin Liu; Hui Ren
Crawler rice combine harvester threshing rack excited by different frequencies of multiple working parts would cause strong vibration response. In this paper, the rack-type rice combine harvester threshing rack was taken as research objective, and then the static analysis of the existing threshing rack was carried out by ANSYS Finite Element software. The topology of the rack structure was optimized
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Morphological and Mechanical Properties of Poly (Butylene Terephthalate)/High-Density Polyethylene Blends Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-14 Nga Thi-Hong Pham; Van-Thuc Nguyen
Poly (butylene terephthalate) (PBT) is a popular thermoplastic polyester resin but has low strength and low melting point. To improve its properties, PBT is often mixed with other resins, such as high-density polyethylene (HDPE). In this study, PBT/HDPE samples with 100% PBT, 5%, 10%, 15%, and 100% HDPE are generated and tested. The samples are analyzed by tensile strength, flexural strength, impact
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New Mortar Mixes with Chemically Depolymerized Waste PET Aggregates Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-12 Dora Foti; Michela Lerna
Nanoparticles are used in innovative mortars in order to improve their engineering properties. In this paper, recycled PET (polyethylene terephthalate) nanoparticles were used as a substitute for sand in mortars. PET aggregates were obtained cutting water bottles wastes into many small sized pieces and the plastic fibres were treated through chemical depolymerization process. Mortars with different
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Bending of Nonconforming Thin Plates Based on the Mixed-Order Manifold Method with Background Cells for Integration Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-12 Xin Qu; Lijun Su; Zhijun Liu; Xingqian Xu; Fangfang Diao; Wei Li
As it is very difficult to construct conforming plate elements and the solutions achieved with conforming elements yield inferior accuracy to those achieved with nonconforming elements on many occasions, nonconforming elements, especially Adini’s element (ACM element), are often recommended for practical usage. However, the convergence, good numerical accuracy, and high computing efficiency of ACM
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Model Experimental Study on Stress Transfer and Redistribution in a Clay Landslide under Surcharge Load Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-11 Heng-Jun Hou; Bo Wang; Quan-Xiang Deng; Zheng-Wei Zhu; Feng Xiao
Stress transfer and redistribution always accompany with the evolution of landslides. However, previous literature studies have mainly focused on stages of stress variation, and far too little attention has been paid to detailed transfer and redistribution process analysis on stress variation. In this paper, a large-scale clay model slope with masonry slide bed and prefabricated cambered slip surface
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Valorization of Food Waste to Produce Eco-Friendly Means of Corrosion Protection and “Green” Synthesis of Nanoparticles Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-10 Georgii Vasyliev; Victoria Vorobyova
Agrifood by-products are a key element within Europe’s sustainable strategies. Valorization and reuse of zero-waste technologies are becoming more popular, and they are commonly named as “second-generation food waste management.” The present study is directed to the valuable extracts of “green” organic compounds from the by-products of fruit and berry/vegetable crops, which can be revalorized in sustainable
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Excitation-Independent Emission of Carbon Quantum Dot Solids Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-10 Xuan-Dung Mai; Yen Thi Hai Phan; Van-Quang Nguyen
Solid assemblies of carbon quantum dots (CQDs) are important for diverse applications including LEDs, solar cells, and photosensors; their optical and electrical properties have not been explored yet. Herein, we used amphiphilic CQDs synthesized from citric acid and thiourea by a solvothermal method to fabricate CQD solid films. Optical properties of CQDs studied by UV-Vis and photoluminescence spectroscopies
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An Improved Predictive Model for Determining the Permeability Coefficient of Artificial Clayey Soil Based on Double T2 Cut-Offs Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-10 Zhen Lu; Aimin Sha; Junfeng Gao; Meng Jia; Wentong Wang
Permeability is one of the most important engineering properties of clayey soil. However, the traditional method for determining the permeability coefficient is time-consuming. To establish a simple and accurate predictive method to obtain the permeability coefficient of artificial clayey soil based on the double cut-off transverse relaxation times (T2 cut-offs) using low-field nuclear magnetic resonance
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Inverse Modeling of Nonlinear Artificial Muscle Using Polynomial Parameterization and Particle Swarm Optimization Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-09 Mohd Azuwan Mat Dzahir; Shin-ichiroh Yamamoto
The properties of pneumatic artificial muscle (PAM) with excellent power-to-weight ratio and natural compliance made it useful for healthcare engineering applications. However, it has undesirable hysteresis effect in controlling a robotic manipulator. This behavior is quasistatic and quasirate dependent which changed with excitation frequency and external force. Apart from this, it also inherits frictional
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Numerical Simulation on Residual Stress Field of Flat-Topped Laser Oblique Shocking of Ni-Based Alloy GH4169 Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-09 Xiangming Qu; Yongkang Zhang; Jun Liu
This paper is based on laser shock peening (LSP) system with a flat-topped beam, using robot simulation software to determine the oblique shock angle of different areas of a certain turbine disk mortise. Three-dimensional finite element analysis was used to study residual stress field of Ni-based alloy GH4169 under flat-topped laser oblique shocking. The effects of different laser energy and different
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The Concrete Performance with Iron Tailings Sand Modified by Polypropylene Fibers under Aggressive Environment Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-09 Ke Tang; Xue-song Mao; Qian Wu; Longqi Liu; Ying Zhao; Wan-jun Huang; Jian-xun Zhang
This paper aimed to explore the performance of concrete with iron tailings sand modified by polypropylene fibers under aggressive environment. Three kinds of concrete (ordinary concrete, concrete with iron tailings sand (ITS), and concrete with ITS modified by polypropylene fibers) were exposed to drying-wetting cycles in 5% Na2SO4 solution for 28, 56, 84, 112, and 140 days. The performance, such as
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Experimental Investigation on Hydroabrasive Erosion of Steel Fiber UHPC and Rubber UHPC Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-08 Shuangxi Li; Liang Tang; Wenyou Shi; Congchun Zhong
Steel fiber ultrahigh performance concrete (UHPC) and rubber ultrahigh performance concrete (UHPC) adopt the methods of “rigidity overcomes rigidity” and “softness overcomes rigidity,” respectively, to resist the abrasion and cavitation erosion caused by water flow carrying large solid particles. The above two have been applied in engineering successfully, but there are differences in material properties
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Effect of Drying-Wetting Cycles on Engineering Properties of Expansive Soils Modified by Industrial Wastes Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-08 Chengfu Chu; Meihuang Zhan; Qi Feng; Dong Li; Long Xu; Fusheng Zha; Yongfeng Deng
The swelling properties of expansive soils can be reduced by the addition of modifiers. Nevertheless, the performance deterioration after modification occurs when weathering for a long term. Therefore, in this study, the effect of drying-wetting cycles on swelling behaviour and compressibility of modified expansive soils with the iron tailing sand and calcium carbide slag has been investigated. The
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Flexural Behavior of Slab-Rib Integrated Bridge Decks with GFRP Skin and Polyurethane Foam Core Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-03 Jing Li; Jun Wang; Bishnu Prasad Yadav; Jiye Chen; Qiang Jin; Weiqing Liu
This paper presents experimental and analytical studies on flexural behavior of slab-rib integrated Sandwich composite decks. The influences of layers of glass fiber-reinforced polymer (GFRP) facesheets, foam densities, and the existence of webs and cross beams are discussed herein. The test results showed that the existence of vertical webs remarkably improved the debonding of the facesheets from
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Sorptive Removal of Color Dye Safranin O by Fibrous Clay Minerals and Zeolites Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-12-02 Ben Sieren; Jessica Baker; Xisen Wang; Samuel J. Rozzoni; Kristen Carlson; Alyssa McBain; Daniel Kerstan; Lori Allen; Libing Liao; Zhaohui Li
The increased use of color dyes in industry imposes a great threat to the environment. As such, developing cost-effective techniques for dye removal from wastewater attracted great attention. Earth materials, particularly those with large specific surface area (SSA) and high cation exchange capacity (CEC), were evaluated for their potential use for wastewater treatment. In this study, palygorskite
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Vibration Response Analysis of Simply Supported Box Girder Bridge-Maglev Train in Accelerated Test of Changsha Maglev Express Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-11-30 Xiao Liang; Tianyong Jiang; Yue Hong; Jiabing Zhang; Mai Jiang; Zeyin Wang
In order to study and analyze the vibration response of simply supported box girder bridge-maglev vehicle, a 25 m span simply supported box girder bridge of Changsha Maglev Express was selected as the research object. Field tests were carried out to explore the dynamic response of maglev vehicle running on the bridge. Firstly, the dynamic characteristics of the bridge under the action of medium-low
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Hydrothermal Preparation of Ag/Ag1.69Sb2.27O6.25 Sesame-Hollow-Ball-Type Nanocomposites: The Formation Mechanism of Metallic Ag in the Ag-H2O System at 400 K Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-11-30 Haomei Liu; Xihai Hao; Yuejun Liu; Aiguo Yan
Ag/Ag1.69Sb2.27O6.25 sesame-hollow-ball-type nanocomposites were prepared via a facile one-step hydrothermal method at 400 K. Power X-ray diffraction analysis shows that all diffraction peaks were well consistent with JCPDS card no: 89-6552 of Ag1.69Sb2.27O6.25. Scanning electron microscopy and high-resolution transmission electron microscopy images of the composites indicate that some smaller metallic
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Microwave Heating Characteristics of Emulsified Asphalt Repair Materials Incorporated with Steel Slag Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-11-29 Yongfeng Wei; Jinyang Huo; Zhenjun Wang; Jiangtao Gao
Emulsified asphalt needs to be cured for a certain age after demulsification to produce strength, which seriously affects the traffic opening time. In this work, microwave heating technology was applied for emulsified asphalt repair materials. Steel slag with high microwave activity was adopted to improve the performance of emulsified asphalt repair materials by microwave heating. Effects of steel
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Experimental Study on the Creep Characteristics of Cemented Backfill in a Goaf Underwater Pressure Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-11-27 JingYu Zhang; Huafeng Deng; GuoYong Duan; LiangPeng Wan; Zuosen Luo; Xushu Sun
As the groundwater environment changes in a goaf, the creep deformation of the backfill underwater pressure is worthy of attention. This paper takes the undercut goaf filling in the Yuzhou section of the middle route of the South-to-North Water Transfer Project as an example. Grading loading creep testing of the backfill under different water pressures was carried out using equipment developed by our
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Orthogonal Analysis and Numerical Simulation of Rock Mechanics Parameters in Stress Field of Shaft Heading Face Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-11-27 Liyun Yang; Siyu Chen; Pengxiang Dong; Qingcheng Wang; Chen Huang
This paper focuses on improving the blasting effect of the drilling and blasting method in the deep rock mass and solves the problems of blasthole collapse and misfire accident in the process of drilling and blasting construction of heading face. FEM software, ABAQUS, is used to simulate the stress distribution around the blasthole by extending a certain depth in the vertical direction of the shaft
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Multianalysis Characterization of Mineralogical Properties of Copper-Lead-Zinc Mixed Ores and Implications for Comprehensive Recovery Adv. Mater. Sci. Eng. (IF 1.271) Pub Date : 2020-11-26 Qian Zhang; Shuming Wen; Qicheng Feng; Song Zhang; Wenlin Nie
Copper-lead-zinc mixed ore in Tibet, China, is a complex and refractory polymetallic ore resource; thus, ascertaining its mineralogical properties is very important for comprehensive recovery of valuable elements. In this work, the mineralogical properties of this copper-lead-zinc mixed ore have been characterized in detail following a multidisciplinary approach, including chemical, phase, x-ray diffraction