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research-article | 30-November-2019

LONG-TERM EFFECT OF DIFFERENT PARTICLE SIZE DISTRIBUTIONS OF WASTE GLASS POWDER ON THE MECHANICAL PROPERTIES OF CONCRETE

increase in GP1 and GP2 of up to 40% and 60%, respectively. They also indicated that GP could be used as a cement substitute in concrete mixtures where there is a higher demand for workability. Conversely, the use of GP in some other studies showed a negative effect on concrete workability [16, 27, 28]. In terms of the mechanical properties of concrete, test results have shown that there is no consensus on the optimum content of GP to improve the strength of hardened concrete [47]. This was mainly due

Brwa OMER, Jalal SAEED

Architecture, Civil Engineering, Environment, Volume 13 , ISSUE 4, 61–75

research-article | 30-November-2018

MECHANICAL PROPERTIES OF CEMENT MORTAR WITH GRAPHENE OXIDE

considered as nano-reinforcement with remarkable mechanical properties or fillers reducing the porosity of cement composites [2]. Numerous exciting nanomaterials were incorporated into cement matrix up to date, including nano-silica [3, 4], nano-alumina [5], nano-titania [6], nano-clay particles [7] or carbon nanotubes [8, 9]. Depending on the chosen material, the addition of nanoparticles may lead to the improvement of both composite strength [3, 5, 7–9] and corrosion resistance [3], the nucleation of

Małgorzata KRYSTEK

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 1, 91–96

Article | 20-July-2021

Galvanic coupling and mechanical properties of low Ni orthodontic brackets with representative types of orthodontic wires

Aim: To characterise the mechanical properties and galvanic coupling of Ni-free orthodontic brackets with stainless steel (SS) and Nickel-Titanium (NiTi) orthodontic wires. Methods: Three Ni-free bracket types (Topic [TOP], Equilibrium [EQU] and Orthos [ORT] made of Ni-free alloys), one conventional (Mini 2000 [MIN]) made of SS alloy and an SS and a NiTi wire were examined in the present study. All brackets and wires were embedded in epoxy resin and, after metallographic grinding and polishing

Géraldine Kummer, Georgios Polychronis, Spiros Zinelis, Theodore Eliades

Australasian Orthodontic Journal, Volume 35 , ISSUE 1, 53–60

research-article | 17-April-2021

EFFECT OF CURING REGIMES ON THE MECHANICAL AND FRESH PROPERTIES OF STEEL FIBER-REINFORCED CONCRETE

. As concrete designed with 25 MPa-compressive strength dominates 846-megajoule energy requirement for the annual world concrete production [4], more investigation needs to be carried out for the low/moderate concrete classes to sustain safe applications in precast industry. Mixture composition has also critical influences on the mechanical properties of steam-cured concrete. Cement type, aggregate amount and water/binder ratio have an impact on the quality and assurance of different concrete

Oğuzhan ÖZTÜRK, Eren YENIDÜNYA, Ülkü Sultan KESKIN

Architecture, Civil Engineering, Environment, Volume 14 , ISSUE 1, 69–81

Research Article | 14-February-2019

WELDING WITH MICRO-JET COOLING AS A WAY TO IMPROVE THE MECHANICAL PROPERTIES OF MODE OF TRANSPORTATION SHAFT SURFACE

The use of surface welding with micro-jet cooling allows to control the structure of the surface layer. It is a way to significantly increase the mechanical properties (for example hardness) of the surface layer. The effect of this is to extend the life of the kinematic pair. The main aim of this paper was to determine the influence of using micro-jet cooling for surface welding on tribological properties (e.g., friction coefficient and weight loss). Results of traditional surface welding

Damian HADRYŚ

Transport Problems, Volume 13 , ISSUE 4, 65–76

Article | 20-July-2021

The effect of electro-thermal treatment of stainless steel arch wire on mechanical properties and cell proliferation

Background: Electric resistance heat treatment may be performed on orthodontic arch wires, but it remains unclear whether this procedure reliably provides better mechanical properties or whether an austenite phase transition affords less cytotoxicity and less arch wire width change. Methods: Stainless steel (SS) arch wires of 0.017 × 0.025 and 0.019 × 0.025 inches in size were heat-treated using a spot welder for eight seconds at power settings of 2, 4, 6 and 8. The surface

Yingzhi Gu, Xianju Xie, Hongmei Wang, Rui Zhuang, Yuxing Bai

Australasian Orthodontic Journal, Volume 36 , ISSUE 1, 75–86

research-article | 30-November-2017

NANOCOMPOSITES PREPARED BY A DISPERSION OF CNTS ON CEMENT PARTICLES

of this nanomaterial allows improvements in the mechanical properties of cementitious compounds [1–5]. However, the hydrophobic nature of CNTs makes the dispersion a challenge to the cement pastes production. CNTs tend to agglomerate and form granules in the presence of water, and those clusters contribute to weakening the PC pastes mechanical properties. A good dispersion is crucial for the improvement of cement composites mechanical strength. According to MELO et al. (2011) [1] there is an

Vanessa Vilela ROCHA, Péter LUDVIG

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 2, 73–77

Article | 28-August-2018

EFFECT OF METAKAOLIN DEVELOPED FROM LOCAL NATURAL MATERIAL SOORH ON WORKABILITY, COMPRESSIVE STRENGTH, ULTRASONIC PULSE VELOCITY AND DRYING SHRINKAGE OF CONCRETE

Abdullah SAAND, Manthar Ali KEERIO, Daddan khan BANGWAR

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 2, 115–122

Article | 10-April-2018

Study on The Mechanical Properties of Hydrostatic Guide-way

Enxiu Shi, Rongshen Zhang, Hailong Wang

International Journal of Advanced Network, Monitoring and Controls, Volume 2 , ISSUE 4, 66–71

Article | 15-August-2021

Chemical and mechanical characteristics of contemporary thermoplastic orthodontic materials

Aim: The aim of the present study was to characterise the chemical and mechanical properties of contemporary thermoplastic orthodontic materials. Materials and methods: Four thermoplastic materials were tested: Clear Aligner (Scheu-Dental), ACE and A+ (Dentsply), and Invisalign (Align Technology). Eight appliances were fabricated from each material and a small portion from each was analysed by ATR-FTIR spectroscopy. The appliances were cut and, following metallographic grinding and polishing

Alexandros Alexandropoulos, Youssef S. Al Jabbari, Spiros Zinelis, Theodore Eliades

Australasian Orthodontic Journal, Volume 31 , ISSUE 2, 165–170

Article | 24-June-2021

EXAMINATION OF MECHANICAL PROPERTIES OF WELDS OF DOCOL 1200M TOWARD APPLICATION IN COMPONENTS OF SPECIAL VEHICLES

Bożena SZCZUCKA-LASOTA, Tomasz WĘGRZYN, Tadeusz SZYMCZAK, Adam JUREK, Jan PIWNIK, Krzysztof Ireneusz WILCZYŃSKI

Transport Problems, Volume 16 , ISSUE 2, 33–43

Article | 30-September-2021

MODERNIZED MAG WELDING AND STAMPING FOR HEAVILY LOADED TRUCK CHASSIS COMPONENTS

joints were subjected to a stamping test. Weld metal deposit (WMD) was carried out for the classic MAG process and compared with the modern method using MJC. Joint sand stamping tests of low-carbon and low-alloy steel were carried out. Welding with micro-jet-cooling could be considered promising due to the useful structure of WMD. This structure yields better mechanical properties, i.e. higher impact toughness for subzero service. For the first time, it was decided to check the pressure of the sheets

Bożena SZCZUCKA-LASOTA, Anita UŚCIŁOWSKA, Tomasz WEGRZYN, Jan PIWNIK, Krzysztof Ireneusz WILCZYŃSKI, Piotr CYBULKO

Transport Problems, Volume 16 , ISSUE 3, 173–183

Article | 20-July-2021

An injectable bone graft substitute to enhance the primary stability of a novel miniscrew – The Sydney Mini Screw

Introduction: Anchorage is crucial in controlling tooth movement during orthodontic treatment. Different designs have been introduced to increase the stability of miniscrews. A new miniscrew, The Sydney Mini Screw (SMS), with a hollow chamber and lateral port holes, has been developed to allow the diffusion of an injectable bone graft substitute (iBGS) into cancellous bone. The aim of this study was to analyse the optimum iBGS application with ideal chemo-mechanical properties to be used in

Anastasia Bakopoulou, Ali Fathi, Hang Xu, Andrew J. Ruys, Aysin Darendeliler, Oyku Dalci, M. Ali Darendeliler

Australasian Orthodontic Journal, Volume 34 , ISSUE 2, 179–187

Article | 30-March-2018

LASER WELDING WITH MICRO-JET COOLING FOR TRUCK FRAME WELDING

The aim of this paper is to analyse the mechanical properties of the weld steel structure of car body truck frames after laser welding. The best welding conditions involve the use of proper materials and alloy elements in steel and filer materials, in addition to welding technology, state of stress and temperature of exploitation. We present for the first time the properties of steel track structures after laser welding with micro-jet cooling. Therefore, good selection of both welding

Jan PIWNIK, Bożena SZCZUCKA-LASOTA, Tomasz WĘGRZYN, Wojciech MAJEWSKI

Transport Problems, Volume 12 , ISSUE SE, 107–114

Article | 26-March-2020

AHSS STEEL WELDING WITH MICRO-JET COOLING IN MOBILE PLATFORMS

. The aim of this article is to choose welding parameters in the process with micro-jet cooling to obtain the best mechanical properties of the welded structure (elongation). The best welding parameters for these difficult-to-weld constructions are presented in detail.

Tomasz WĘGRZYN, Bożena SZCZUCKA-LASOTA, Jan PIWNIK, Adam JUREK

Transport Problems, Volume 15 , ISSUE 1, 131–140

Article | 05-September-2020

ALUMINUM ALLOY WELDING IN AUTOMOTIVE INDUSTRY

The paper presents the possibilities of using light alloy components in vehicle construction. Material 6082 was chosen for use in responsible structural components. The structure and strength parameters of the material in the delivery state were tested. Tested material parameters were compared with normative requirements. The purpose of the paper is to check the mechanical properties of aluminum alloy welded joints by various processes and parameters. Until now, welding of 6082 alloy did not

Bożena SZCZUCKA-LASOTA, Tomasz WĘGRZYN, Adam JUREK

Transport Problems, Volume 15 , ISSUE 3, 67–78

Research Article | 02-February-2017

MODELLING OF THERMOELASTIC TRANSIENT CONTACT INTERACTION FOR BINARY BEARING TAKING INTO ACCOUNT CONVECTION

Summary.Serviceability of metal-polymeric "dry-friction" sliding bearings depends on many parameters, including the rotational speed, friction coefficient, thermal and mechanical properties of the bearing system and, as a result, the value of contact temperature. The objective of this study is to develop a computational model for the metallic-polymer bearing, determination on the basis of this model temperature distribution, equivalent and contact stresses for elements of the bearing

Igor KOLESNIKOV, Sergey DANILCHENKO, Elena KOLOSOVA, Mikhail CHEBAKOV, Alexander LYAPIN

Transport Problems, Volume 11 , ISSUE 4, 73–81

research-article | 23-April-2019

INVESTIGATION OF TIRE FORCE TRANSMISSION ON INTERACTION WITH SLUSH

layers–drum The interaction between sub-block and slush layer also depends on the physical–mechanical properties of sub-block material and geometric parameters (height, width, and length). The physical– mechanical properties were evaluated through stiffness (Ke) and damping (Ce) coefficients. The mass of sub-block was also evaluated in the model. Dynamic viscosity of slush is calculated as follows: (1) μSl=μSl, 0+aSlISlbSl , where is μSl,0 the initial dynamic viscosity, and aSl and bSl are the

Marijonas BOGDEVIČIUS, Andrius RUŽINSKAS, Vaidas VADLŪGA, Paulius BOGDEVIČIUS, Rimantas KAČIANAUSKAS, Algirdas MAKNICKAS, Frank GAUTERIN

Transport Problems, Volume 14 , ISSUE 1, 13–21

research-article | 30-November-2017

PROPERTIES OF COARSE MINERAL AGGREGATES AGAINST PROPERTIES OF CONCRETE

Wojciech PIASTA, Waldemar BUDZYŃSKI, Jacek GÓRA

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 3, 97–105

Research Article | 01-September-2011

MEASUREMENT OF STRESS-STRAIN RESPONSE OF A RAMMED EARTH PRISM IN COMPRESSION USING FIBER BRAGG GRATING SENSORS

A comparative study of strain response and mechanical properties of rammed earth prisms, has been made using Fiber Bragg Grating (FBG) sensors (optical) and clip-on extensometer (electro-mechanical). The aim of this study is to address the merits and demerits of traditional extensometer vis-à-vis FBG sensor; a uni-axial compression test has been performed on a rammed earth prism to validate its structural properties from the stress - strain curves obtained by two different methods of

A. S. Guru Prasad, M. Anitha, K. S. Nanjunda Rao, S. Asokan

International Journal on Smart Sensing and Intelligent Systems, Volume 4 , ISSUE 3, 376–387

Article | 24-June-2021

MATERIALS USED IN THE COMBAT AVIATION CONSTRUCTION

greater heat-resistance and anti-corrosion properties, as well as high wear resistance in addition to the aforementioned hardness, which increases by as much as 15% for the AlSi9Cu4 alloy compared with the alloy after standard heat treatment. Such an increase in the values of the mechanical properties makes it possible to use the investigated alloy in applications including, e.g., recyclable thermally exposed surfaces, such as pistons in internal combustion engines, which enables further decrease in

Jarosław KONIECZNY, Krzysztof LABISZ

Transport Problems, Volume 16 , ISSUE 2, 5–18

Review | 28-June-2019

High resolution ultrasound for imaging complications of muscle injury: Is there an additional role for elastography?

appreciate subtle changes(4–8). In the subacute and chronic stages, ultrasound can be of value to follow up injured muscle during the healing process and identify complications that may require special treatment(4–8). In addition to morphological features, ultrasound imaging combined with strain and shear wave elastography can also provide information on the mechanical properties of intact and diseased muscle tissue, thus allowing assessment of muscle biomechanics in the clinical setting(9–16). Strain

Eleni E. Drakonaki, Iwona Sudoł-Szopińska, Christos Sinopidis, Panagiotis Givissis

Journal of Ultrasonography, Volume 19 , ISSUE 77, 137–144

research-article | 07-January-2020

THE INTERACTIONS BETWEEN ANTI-FOAMING AND SUPERPLASTICIZING ADMIXTURES AND THEIR CONSEQUENCE FOR PROPERTIES OF SELF-COMPACTING MORTAR AND CONCRETE

(on average about 10%), so a strong mechanism of foam generation is common [1]. The sizes of pores formed during PCP action in hardened concrete are too big. The air content in the concrete mixture does not work only for its flow, but above all for final mechanical properties and durability of hardened concrete. There are four types of pores in concrete. Gel pores, the common size of (1.5–2.0) µm, have no negative effect on concrete strength due to porosity. However, they directly affect creep and

Beata ŁAŹNIEWSKA-PIEKARCZYK

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 4, 61–71

Article | 15-March-2021

MIXED WELDING OF THE MOBILE CONSTRUCTION PLATFORM IN THE AUTOMOTIVE INDUSTRY

-strength steel). This kind of joint is not easy to manufacture due to the different chemical compositions and thicknesses of both grades of steel. The difference in the thickness of welded elements creates an additional difficulty. The main aim of this article is to determine the most appropriate welding parameters and select additional materials to obtain the correct joint with good mechanical properties, free from welding defects and incompatibilities. This article examines whether the application of

Tomasz WĘGRZYN, Bożena SZCZUCKA-LASOTA, Jan PIWNIK, Adam JUREK, Krzysztof Ireneusz WILCZYŃSKI

Transport Problems, Volume 16 , ISSUE 1, 29–38

Review | 29-June-2016

Introduction to ultrasound elastography

For centuries tissue palpation has been an important diagnostic tool. During palpation, tumors are felt as tissues harder than the surrounding tissues. The significance of palpation is related to the relationship between mechanical properties of different tissue lesions. The assessment of tissue stiffness through palpation is based on the fact that mechanical properties of tissues are changing as a result of various diseases. A higher tissue stiffness translates into a higher elasticity modulus

Andrzej Nowicki, Katarzyna Dobruch-Sobczak

Journal of Ultrasonography, Volume 16 , ISSUE 65, 113–124

research-article | 30-November-2019

EFFECT OF RANDOM STRENGTH PARAMETERS OF FLANGE STEEL ON BENDING RESISTANCE AND DEFLECTIONS OF GIRDERS WITH CORRUGATED WEB

on request. The guaranteed yield strength of delivered hot rolled flat steel sheet known as the specified minimum Remin equals to 235, 275 or 355 MPa [10]. Remin is determined only on the basis of tests conducted on steel specimens. Steel sheets with yield strength below the minimum value are rejected from the production. The guaranteed yield strength Remin should be lower than yield strength of flat sheets obtained as the result of testing mechanical properties [11, 12]. This value at the same

Witold BASIŃSKI

Architecture, Civil Engineering, Environment, Volume 13 , ISSUE 4, 47–60

Article | 30-July-2021

The addition of carbon nanotubes to orthodontic adhesives: an in vitro study

Objective: The evolution of adhesive dentistry and the addition of nanoparticles has heralded an improvement in the mechanical properties of adhesives. Thus, the aim of the present study was to evaluate the effects produced by carbon nanotubes (CN) added to two adhesives used for indirect bonding by an examination of the shear bond strength (SBS) and location of bond failure. Methods: One hundred and sixty bovine incisors were randomly divided into eight groups (N = 20): (1) indirect bonding

Paulo Guilherme Bittencourt Marchi, Felipe de Brum Ricardi, Maurício Matté Zanini, Paulo Rodrigo Stival Bittencourt, Mauro Carlos Agner Busato

Australasian Orthodontic Journal, Volume 33 , ISSUE 1, 57–63

Article | 30-July-2021

Degradation and deformation of latex and non-latex orthodontic elastics

Background: Intermaxillary elastics are widely used in corrective orthodontic treatment particularly for the interdigitation of buccal segments and the correction of the midline. However, latex has been known to cause allergy, which may restrict elastic use. As alternative materials, non-latex elastics are available. However, clinicians must be aware of their mechanical properties, especially those of deformation and force degradation that affect these materials over time. Objectives: The aim

Pedro Lima Emmerich Oliveira, Mírian Aiko Nakane Matsumoto, Gisele Faria, Fábio Lourenço Romano

Australasian Orthodontic Journal, Volume 33 , ISSUE 1, 64–72

research-article | 30-November-2017

STIFFNESS MODULE AND COMPRESSION STRENGTH OF POLYMER-TREATED SAND

1. INTRODUCTION According to the increasing demand of suitable soils under different types of foundation in the geotechnical engineering projects, many researchers try to find the best type of additives to enhance the strength of soils and to improve its mechanical properties. It is a big challenge to define the stress–strain behavior of the soil because it is complex and nonlinear. Young’s modulus (E) and the shear modulus (G) of the soil are not constant; it may significantly change with the

Maiasa MLHEM

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 1, 97–104

research-article | 30-November-2017

APPLICATION OF FIBERS FROM END-OF-LIFE TIRES AS A SELF-COMPACTING CONCRETE REINFORCEMENT – AN EXPERIMENTAL STUDY

though the recycled steel fibers were analysed by some researchers e.g. [2-8] there is still a deficiency of knowledge considering the real influence of that kind of fibers on the mechanical properties of concrete matrix. Immensity of studies has proved the effectiveness of the randomly distributed fibers in enhancing the tensile mechanical properties, fracture energy and behaviour under impact of brittle concrete matrix [9,10]. The fiber reinforced concrete (FRC) has found a wide range of practical

Małgorzata PAJĄK

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 1, 105–113

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