In Situ Determination of the Elastic Modulus of Concrete by Means of Ultrasonic Pulse Method

2018 ◽  
Vol 272 ◽  
pp. 70-75
Author(s):  
Petr Cikrle ◽  
Dalibor Kocáb ◽  
Barbara Kucharczyková ◽  
Ondřej Anton
Keyword(s):  
Elastic Modulus ◽  
Pulse Method ◽  
Ultrasonic Pulse ◽  
In Situ Measurements ◽  
Test Method ◽  
Destructive Test ◽  
Non Destructive ◽  
Thick Layers

The paper deals with the in-situ determination of the modulus of elasticity on the bridge elements using ultrasonic pulse method. This non-destructive test method was chosen for the measurement because of its undisputed advantages that allow the measurement of relatively thick layers of material. For the purpose of the elastic modulus verification the direct measurement was used, in which a pair of transducers (transmitter and receiver) were placed directly opposite to each other. The results of performed in-situ measurements as well as the results of verification tests performed in the laboratory are presented in the paper. The article also discusses the issue of evaluation and interpretation of the results obtained by in-situ measurements using non-destructive test method.

Determination of Effective Cable Stayed Bridge Link Pin Non-Destructive Test Method

2001 ◽  
Vol 84 (10) ◽  
pp. 33-40
Author(s):  
Woo-Jin Kim ◽  
Ju-Yeob Kim ◽  
Chang-Soo Park ◽  
Theodor Krauthammer ◽  
Jung-Ho Won ◽  
...  
Keyword(s):  
Test Method ◽  
Destructive Test ◽  
Cable Stayed Bridge ◽  
Non Destructive

Assessment of Compressive Strength for RC Building Using the Non-Destructive Test and the SonReb Method: A Case Study

2021 ◽  
Vol 1021 ◽  
pp. 45-54
Author(s):  
Mohammed Al-Helfi ◽  
Ali Allami
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Test Method ◽  
Technical Institute ◽  
Existing Building ◽  
Destructive Test ◽  
Non Destructive

Non-Destructive methods have greater advantage in assessing the homogeneity, compressive strength, corrosion of rebars in concrete etc. of damaged structures. The aim of the present study is to assess the existing building, which is 41 year old, in the Technical Institute of Amara affiliated with the Southern Technical University, Maysan, Iraq. The research focus on the assessment of the concrete strength and the inspection of the damages in the building. Besides the visual inspection, the ultrasonic pulse velocity and schmidt hammer were used as a non-destructive test method for testing of 30 columns and 15 beams for a building consisting of three floors. The concrete compressive strength was estimated by using SonReb method. The equations proposed by Gasparik, 1984, Di Leo & Pascale, 1994, Arioglu et al., 1996, Cristofaro et al. (EXP), 2020 and Cristofaro et al (PW), 2020 were used for assessment the compressive strength of oncrete. The non-destructive test results indicated that the average strength of the structural elements greater than the design compressive strength of the tested elements. Therefore, the building can be considered structurally is safe.

Mechanical and Durability Properties of Selected Types of Sandstones

2016 ◽  
Vol 827 ◽  
pp. 324-327
Author(s):  
Pavel Reiterman ◽  
Ondřej Holčapek
Keyword(s):  
Main Part ◽  
Material Parameter ◽  
Pulse Method ◽  
Ultrasonic Pulse ◽  
Non Destructive Testing ◽  
Porous Rocks ◽  
Destructive Testing ◽  
Water Absorption Test ◽  
Non Destructive

Present paper is focused on the experimental assessment of three sandstones from different quarries. Mechanical testing was carried out besides water absorption test and determination of frost resistance what is the crucial material parameter for all types of porous rocks. Gradual deterioration due to action of frost was monitored using non-destructive testing – ultrasonic pulse method. Obtained results well describe failure mechanism of studied sandstones of different basic physical properties. It was conducted that main part of deterioration was performed at the beginning of the freeze-thaw cycling.

scholarly journals PENGUKURAN KETULENAN EMAS MENGGUNAKAN KAEDAH UJIAN TANPA MUSNAH: SUATU ULASAN PERBANDINGAN

2021 ◽  
Vol 9 (2) ◽  
pp. 91-106
Author(s):  
FAZRUL MOHD NOR ◽  
ABD RAHMAN TAMURI ◽  
ABD KHAMIM ISMAIL ◽  
MOHD ERFY ISMAIL ◽  
MOHD HASRIL AMIRUDDIN
Keyword(s):  
Test Method ◽  
X Ray ◽  
Destructive Test ◽  
The Difference ◽  
Gold Industry ◽  
Non Destructive ◽  
And Tungsten

AbstrakPenentuan ketulenan jongkong emas dengan kaedah ujian tanpa musnah adalah perkara yang paling mencabar dalam industri emas terutama jika jongkong emas dipalsukan dengan cara meletakkan tungsten di dalamnya. Instrumen yang sedia ada mempunyai keterbatasan untuk menentukan ketulenan jongkong emas dan sukar untuk mengesan tungsten di dalamnya kerana tungsten mempunyai ketumpatan yang hampir sama dengan emas. Kajian ini mengemukakan keterbatasan instrumen kaedah ujian tanpa musnah seperti densimeter, alat timbangan, sinar-x pendarfluor dan ultrasonik. Dalam kajian ini menemui kesukaran untuk mengenal pasti emas palsu menggunakan instrumen kaedah ujian tanpa musnah seperti ultrasonik dan x-ray fluorescence (XRF) kerana instrumen ini mempunyai batasan. Setakat ini tiada lagi kajian yang berkaitan pemalsuan jongkong emas kerana harganya yang mahal untuk dijadikan sebagai sampel kajian. Masalah jongkong emas palsu dapat diselesaikan jika ketepatan instrumen yang digunakan untuk mengukur ketumpatan dapat ditingkatkan lagi sehingga 0.01 g/ml. Ini kerana perbezaan antara ketumpatan emas dan tungsten adalah 0.05 g/ml. Pemalsuan emas dengan mencampurkan tungsten akan dapat dikesan jika ada instrumen yang mempunyai ketepatan sekurang-kurangnya 0.01 g/ml. Manakala instrumen lain seperti XRF digunakan untuk mengesahkan ketulenan emas di bahagian permukaan sahaja. Oleh itu, bagi pengujian yang lebih menyeluruh masalah jongkong emas palsu ini perlu diselesaikan dengan menggabungkan kedua-dua kaedah ini.   Abstract Determination of the gold bar purity by non-destructive method remains one of the most challenging in gold industry especially when the tungsten is inside the gold bar. The existing instruments have limitations in their accuracy to determine the purity of gold when tungsten also inside the gold bar since both tungsten and gold have almost similar densities. This study presents the limitations of the non-destructive test method instruments such as densimeter, weighing balance, x-ray fluorescence (XRF) and ultrasonic in determining the purity of gold. In this study found the difficulty in identifying counterfeit gold using non-destructive test method instruments such as ultrasonic and XRF due to some limitations. So far, there are no studies related to the counterfeiting of gold bars due to its expensive price to be used as a study sample. The problem of counterfeit gold bars can be solved if the accuracy of the instrument used to measure the density can be further increased up to 0.01 g/ml. This is because the difference between the density of gold and tungsten is 0.05 g/ml. Gold counterfeiting by mixing tungsten will be detectable if there is an instrument that has an accuracy of at least 0.01 g/ml. While other instruments such as XRF will be used to verify the purity of gold on the surface only. Therefore, for more thorough testing the problem of fake gold ingots needs to be solved by combining these two methods.

scholarly journals Inspection of the Composite Materials

2021 ◽  
Vol 10 (3) ◽  
pp. 146
Author(s):  
Yaser A. Jasim ◽  
Senan Thabet ◽  
Thabit H. Thabit
Keyword(s):  
Composite Materials ◽  
Visual Inspection ◽  
Magnetic Particle ◽  
Phased Array ◽  
Ultrasonic Inspection ◽  
Test Method ◽  
Main Method ◽  
Destructive Test ◽  
Eddy Current Inspection ◽  
Non Destructive

<p><em>A non-destructive test method is the main method to examine most of the materials, composite materials in particular. There are too many </em><em>Non-Destructive Test (</em><em>NDT) methods to inspect the materials such as, Visual Inspection, Liquid Penetrate Inspection, Eddy-Current Inspection, Phased Array Inspection, Magnetic Particle Inspection and Ultrasonic Inspection</em><em>.</em></p><p><em>This paper aims to creat a unified methodology for engineers depending on reaserch onion to study the inspection of the composite materials.</em></p><p><em>The researchers concluded that NDT method is the most suitable method for testing any materials and the composite materials. They also recommended to choose the most suitable NDT method as every materials and composite materials have its own properties as well as the inspection methods had its own capabilities and limitations. </em></p>

scholarly journals Overlay maintenance on road heavy vehicle lane by non-destructive test method

2019 ◽  
Author(s):  
Dadang Iskandar ◽  
Sigit Pranowo Hadiwardoyo ◽  
Raden Jachrizal Sumabrata ◽  
Hendra Ariyapijati
Keyword(s):  
Test Method ◽  
Heavy Vehicle ◽  
Destructive Test ◽  
Non Destructive

Bohrwiderstandsmessungen, eine neue und standardisierbare Methode zur Bestimmung der Kohäsion von Naturstein: Entwicklung eines Prototypes und dessen Erprobung / Drilling force measurement system, a new standardisa i methodology to determine the stone cohesion: Prototype design and validation

2000 ◽  
Vol 6 (2) ◽  
pp. 115-132 ◽  
Author(s):  
P. Tiano ◽  
C. Filareto ◽  
S. Ponticelli ◽  
M. Ferrari ◽  
E. Valentini
Keyword(s):  
Force Measurement ◽  
Direct Determination ◽  
Drilling Force ◽  
System A ◽  
Stone Materials ◽  
Force Measurement System ◽  
Drilling Resistance ◽  
Non Destructive

Abstract In the field of conservation of monumental buildings actually a standard methodology is lacking, with which it is possible to determine with the same sensitivity and reliability the "stone hardness" both at the superficial surface and at larger depths (few centimetres), both in laboratory and in situ. The use of the drilling resistance to determine the stone hardness is a very recent application and few working outdoor devices exist. The objective of this work is to validate a new and improved system to assess the drilling resistance of stones. The DFMS is portable and a quasi non-destructive device for direct determination of the "cohesion" of stone materials through the determination of their drilling resistance. The best operational features of the prototype have been established together with the assessment of the sensitivity and reliability of the system.

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