scholarly journals Prediction of Mechanical Alterations in Multi-Layer Sbs-Modified Hot Mix Asphalt and Soil-Foundation Structure

2021 ◽  
Vol 16 (3) ◽  
pp. 159-194
Author(s):  
Ahmet Sertac Karakas ◽  
Faruk Ortes
Keyword(s):  
Mechanical Properties ◽  
Service Life ◽  
Mechanical Response ◽  
Hot Mix Asphalt ◽  
Empirical Studies ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Material Design ◽  
Ground Layer ◽  
Stress And Deformation

Traffic and environmental conditions are key parameters in road applications. Empirical studies and numerical analyses, which are widely adopted in material design studies, are used for analysing superstructures of the roads, and developmental approaches are improved for future designs as well. In flexible pavements, polymer and fibre-reinforced additives are frequently used to make them durable against deteriorations and to extend their service life. One of the additives that is mostly preferred is the Styrene Butadiene Styrene (SBS) material thanks to a variety of their physical and chemical properties. Physical and mechanical properties of the natural ground layer and its interactions with the superstructure are crucial parameters in terms of performance under various environmental and traffic conditions. In this study, the use of SBS-modified Hot Mix Asphalt (HMA) was examined as a flexible superstructure, and the mechanical properties of the granular base and the natural ground layer were tested. The stress and deformation occurring within layers in various periods were also considered. The presented study is a suitable tool for the use of additives that significantly contribute to the mechanical properties and service life of the roads. In this study, it is concluded that the use of additives significantly improves the mechanical response and service life of the roads.

Material Design and Experiment Test of a High-Impedance Complex Film

2017 ◽  
Vol 1142 ◽  
pp. 183-187 ◽  
Author(s):  
Jin Tao Liu ◽  
Yong Li ◽  
Chun Lan Feng
Keyword(s):  
Mechanical Properties ◽  
Space Station ◽  
Physical And Mechanical Properties ◽  
Material Design ◽  
Film Material ◽  
Chemical Corrosion ◽  
High Impedance ◽  
Resistance Property ◽  
Corrosion Resistance Property ◽  
Complex Film

A novel high-impedance compound film material has been developed to satisfy the reservoir of many kinds of space liquid in space station. Considering the high gas-resistance and liquid-resistance, and its compatibility with the liquid in space station, the complex film was designed using 9 layers materials. The compatibility experiment and mechanical properties experiment showed that the high-impedance complex film has good compatibility with drinking water in space station. It also has excellent heat seal ability, physical and mechanical properties. The complex film also has high gas-resistance and water-resistance property, as well as great chemical corrosion-resistance property. The high-impedance complex film material offers a new method for the design and application of liquid container in space station.

Some Physical and Mechanical Properties of Garlic

2007 ◽  
Vol 3 (6) ◽  
Author(s):  
Adel H. Bahnasawy
Keyword(s):  
Mechanical Properties ◽  
Friction Coefficient ◽  
Contact Surface ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Friction Angle ◽  
Arithmetic Mean ◽  
The Other ◽  
Cross Sectional ◽  
Length Width

The physical parameter results showed that the garlic geometric and arithmetic mean diameters ranged from 2.53 to 4.93, and 2.53 to 5.02 cm, respectively according to the bulb size categories. The cloves' length, width and thickness were 1.92 to 2.91, 0.78 to 1.32, and 0.69 to 0.99 cm, respectively. The surface and cross-sectional of areas ranged from 53.31 to 136.4 and 29.1 to 128.4 cm2, respectively. The number of cloves ranged from 18 to 51/bulb according to the bulbs size categories. Bulk density, repose angle and coefficient of contact surface values ranged from 892 to 1007 kg/m3, 41.52 to 45.04º, and 0.91 to 1.12, respectively, according to the bulb size categories.The chemical properties showed that the emptying (friction) angle ranged from 23.25 to 28.82º, where small bulbs recorded the highest values on the concrete surfaces, while the lowest values were recorded by the large bulbs on the iron surfaces. The friction coefficient decreased with increasing bulb size, where it was the highest (0.8) for the small bulbs on the concrete surfaces; on the other hand, the lowest values (0.36) were recorded for the large bulbs on the iron surfaces. The crushing load of the cloves ranged from 55.6 to 155.0 N, depending on the bulb size. The force required for loosening the cloves from the bulb ranged from 110 to 272 and 101 to 320 N on the horizontal and vertical positions of the bulbs.

scholarly journals Mechanical Properties and Cost-Minimized Design of 6-liter PET Bottle Using Finite Element Method

2020 ◽  
Vol 17 (6) ◽  
pp. 579-587
Author(s):  
Kunlapat THONGKAEW ◽  
Thanwit NAEMSAI
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Maximum Stress ◽  
Fem Simulation ◽  
Chemical Properties ◽  
Optimal Thickness ◽  
Testing Procedures ◽  
Stress And Deformation ◽  
Element Method

Over the years, plastic water bottle manufacturing, especially PET (Polyethylene terephthalate) bottle has been steadily increasing due to its toughness, transparency, and chemical properties. However, most manufacturers have to spare time, and cost, verifying their prototypes in accordance to the Thai Industrial Standard (TIS) before any mass production can start. This paper aims to overcome some of these problems by using Finite Element Method (FEM) to study bottle mechanical properties, particularly maximum stress and deformation that can be employed to evaluate performance and optimal thickness. From simulation results the optimal thickness of a 6-liter bottle, that its maximum stress can still be kept under critical value, is 0.45 mm. The thinner and lighter bottle reduces the amount of material usage. The FEM simulation also speeds up and alleviates some necessary testing procedures in a prototype designing process.

scholarly journals Willow wood (Salix alba) as a raw material for pulp production

2005 ◽  
Vol 59 (7-8) ◽  
pp. 175-179
Author(s):  
Bojana Klasnja ◽  
Sasa Orlovic ◽  
Nenad Radosavljevic ◽  
Miroslav Markovic
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Populus Deltoides ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Poplar Wood ◽  
Salix Alba ◽  
Pulp Production ◽  
Sulphate Pulp

The properties of willow wood (structural-physical and mechanical properties and chemical composition) were investigated to determine the parameters of the technological process of semichemical and sulphate pulp manufacture. The experimental material was willow wood Salix alba cl. 107/65/7. Semichemical and sulphate pulp were obtained in the laboratory. The yield, chemical properties and physical-mechanical properties of the obtained intermediate products intended for paper manufacture, were determined. The properties of poplar wood Populus deltoides Bartr. cl.725, were studied and its pulp production performed with the aim of comparison.

scholarly journals Possibilities of using aluminate cements in high-rise construction

2018 ◽  
Vol 33 ◽  
pp. 02056
Author(s):  
Maria Kaddo
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Service Life ◽  
Portland Cement ◽  
Physical And Mechanical Properties ◽  
High Alumina ◽  
Corrosion Resistant ◽  
High Rise ◽  
Aluminate Cement

The article describes preferable ways of usage of alternative binders for high-rise construction based on aluminate cements. Possible areas of rational use of aluminate cements with the purpose of increasing the service life of materials and the adequacy of the durability of materials with the required durability of the building are analyzed. The results of the structure, shrinkage and physical and mechanical properties of concrete obtained from dry mixes on the base of aluminate cements for self-leveling floors are presented. To study the shrinkage mechanism of curing binders and to evaluate the role of evaporation of water in the development of shrinkage was undertaken experiment with simple unfilled systems: gypsum binder, portland cement and «corrosion resistant high alumina cement + gypsum». Principle possibility of binder with compensated shrinkage based on aluminate cement, gypsum and modern superplasticizers was defined, as well as cracking resistance and corrosion resistance provide durability of the composition.

scholarly journals Rubber Material Properties of Several Rubber Tree Strains

2019 ◽  
Vol 136 ◽  
pp. 03001
Author(s):  
Wang Kaidian ◽  
Han Quanhui ◽  
Lu qingzhi ◽  
Chen Zhanxiong ◽  
Li Jianhui ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rubber Tree ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Physical And Chemical Properties ◽  
Rubber Material ◽  
Vulcanized Rubber ◽  
Processing Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

：The rubber from rubber tree strain reyan 8-79 (hainan), zhanshi 218-6 (guangdong), yunyan 73-46 and yunyan 75-11 (yunnan) were tested to determine the physical and chemical properties, processing properties of raw rubber and physical and mechanical properties of vulcanized rubber. The results showed that raw rubber from different tree strains had different physical and chemical properties, processing properties,andthe physical and mechanical properties of vulcanized rubber were different as well. Yunyan 75-11 had the highest mooney viscosity, Reyan 8-79 had the highest protein content, Zhanshi 218-6 had the best tensile and tearing strength, Yunyan 73-46 had small elastic modulus, large loss factor and good processing properties.

Effect of Multi-Wall Carbon Nanotubes on the Properties of Natural Rubber Nanocomposites

2013 ◽  
Vol 832 ◽  
pp. 338-343 ◽  
Author(s):  
Azira Abd. Aziz ◽  
A.I.H. Habibah Dayang ◽  
Abu Bakar Suriani ◽  
Mohamad Rusop Mahmood
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Natural Rubber ◽  
Mechanical Test ◽  
Chemical Properties ◽  
Tensile Modulus ◽  
Physical And Mechanical Properties ◽  
Volume Resistivity ◽  
Multi Wall Carbon Nanotubes ◽  
Initial Modulus

Multi-walled carbon nanotubes (MWNTs) were used to prepare epoxidised natural rubber (ENR) nanocomposites. Our attempt to achieve nanostructures in MWNTs/ENR nanocomposites were formed by incorporating carbon nanotubes in a polymeric solution. Using this technique, nanotubes can be dispersed homogeneously in the ENR matrix with an attempt to increase the mechanical properties of these nanocomposites. The properties of the nanocomposites such as volume resistivity, tensile strength and tensile modulus were studied. Mechanical test results show an increase in the initial modulus for up to 14 times in relation to pure ENR. In addition to mechanical testing, the dispersion state of the MWNTs into ENR was studied by field emission electron microscopy (FESEM) and atomic force microscope (AFM) in order to understand the morphology of the resulting system. According to the present study, application of the physical and mechanical properties of carbon nanotubes to ENR can result in rubber products which have improved mechanical, physical and chemical properties.

scholarly journals Physical and Mechanical Properties of Rural-Road Pavement Concrete in South Korea Containing Air-Cooled Blast-Furnace Slag Aggregates

2021 ◽  
Vol 11 (12) ◽  
pp. 5645
Author(s):  
Byung-Hwan Ahn ◽  
Su-Jin Lee ◽  
Chan-Gi Park
Keyword(s):  
Mechanical Properties ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Physical And Chemical Properties ◽  
Air Content ◽  
Road Pavement ◽  
Performance Requirements ◽  
Rural Road ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of this study was to assess the physical and mechanical properties of pavement concrete for rural roads of South Korea made with air-cooled slag aggregate, which is an industrial byproduct. This study assessed the physical and chemical properties according to the following performance requirements based on the design criteria of the Korea Ministry of Agriculture’s Agricultural Production Infrastructure Maintenance Business Plan and the Korea Expressway Corporation’s Highway Construction Specialized Specifications: slump of 80 mm or greater, air content of 4.5 ± 1.5%, compressive strength of at least 21 MPa, splitting tensile strength of at least 4.2 MPa, and a chloride penetration resistance of less than 4000 C. The slump, air content, compressive strength, splitting tensile strength, flexural strength, and chloride ion permeability of the aggregate-containing concretes were measured. The air-cooled slag aggregates provided the necessary physical and chemical properties and presented no environmental issues. Furthermore, the slump and air content of concrete made with the aggregates met the target values. The slump decreased and the air content increased with increasing amounts of air-cooled slag aggregate. Mechanical testing of the concretes containing air-cooled slag aggregate established that they met the performance requirements for rural road pavement.

scholarly journals Assessment of Carbonate Rocks, Western Desert of Iraq as Dimension Stones for Building

2016 ◽  
Vol 2 (7) ◽  
Author(s):  
Salih Muhammad Awadh , Linaz Anis Fadhil
Keyword(s):  
Mechanical Properties ◽  
Carbonate Rocks ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Field Work ◽  
Western Desert ◽  
Modulus Of Rupture ◽  
American Standard ◽  
Western Desert Of Iraq ◽  
Physical And Chemical

The current study aimed to assess the Carbonate rocks as dimension stones for building. Carbonate rocks collected from the Mauddud Formation (Albian- Cenomanian), within the Western Desert of Iraq are studied petrographically, mineralogically and geochemically. Physical and mechanical properties of selected samples are found to assess their suitability as building stones. Field work is carried out and evaluated sampling of three sites of carbonate rocks. Petrography and mineralogy of these rocks are studied using polarized microscope and XRD technique.Three microfacies (peloidal wackstone-packstone, peloidal packstone and crystalline carbonate) are distinguished. Dolomitization, cementation and recrystallization are themain diagenetic processaffecting the physical and chemical properties of them. Dolomite is the predominant mineral in the 1M and 2M sites, whereas calcite is the most predominant mineral in the 3M site, so it is classified as limestone. Chemically samples are analyzedfor SiO2, Al2O3, CaO, MgO, Fe2O3, Na2O, K2O, TiO2, MnO and LOI. CaO and MgO are the most predominant oxides confirming the abundance of calcite and dolomiteso it is classified as a calcitic dolomite for 1M and 2M sites while classified as limestone for 3M site. The results of analysis physical and mechanical properties (bulk density, water absorption, compressive strength, modulus of rupture and abrasion resistance) are indicate that selected rocks are suitable as dimension stones for building according to American Standard for Testing Materials (ASTM) specification.

scholarly journals Electro-plasticity’s Effect By Deformation And Impulse Impact Of A High Energy Electromagnetic Field

2021 ◽  
Vol 2131 (4) ◽  
pp. 042059
Author(s):  
Andrey Kochetov ◽  
Elena Fisunova ◽  
Tatiana Lavrenova ◽  
Lyubov Filonenko
Keyword(s):  
Mechanical Properties ◽  
Electromagnetic Field ◽  
Service Life ◽  
Protective Coatings ◽  
Composite Coatings ◽  
Amorphous Material ◽  
Physical And Mechanical Properties ◽  
High Energy ◽  
Ultrasonic Field ◽  
Subsequent Formation

Abstract The problem of obtaining predicted physical and mechanical properties and a given service life of multifunctional composite protective coatings in the form of barrier layers that increase the service life of mechanical engineering products and formative tools are inherently interconnected. Among all the variety of innovative highly efficient technological processes, a special place should be given to the method of electro-acoustic spraying (ELAN). This method is innovative in the field of synthesis of multifunctional composite coatings, which allows the formation of protective films of an amorphous material on any conductive substrates [1]. This technology is based on the use of the complex energy of an electric spark and a complex ultrasonic field. The aim of this work is to optimize the process of obtaining multifunctional composite protective coatings based on the complex mass transfer of the electrode material and the subsequent formation of amorphous structures with predictable physical and mechanical properties by the method of electro-acoustic spraying based on the effect of electro-plasticity during deformation and pulsed action of a high-energy electromagnetic field.

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