Verification of the Use of a Kučera Drill for Testing of Wood Properties

2021 ◽  
Vol 898 ◽  
pp. 107-112
Author(s):  
Pavel Černý ◽  
Romana Halamová ◽  
Věra Heřmánková
Keyword(s):  
Wood Quality ◽  
Wood Properties ◽  
Masonry Structures ◽  
Destructive Testing ◽  
Depth Of Penetration ◽  
Initial Experiment ◽  
Mortar Strength ◽  
Wooden Structures ◽  
Non Destructive ◽  
Destructive Methods

In common practice, we encounter cases where it is not possible to test the wood quality by destructive methods and it is, therefore, necessary to use non-destructive or semi-destructive methods, especially when the wood is already used in construction. The article deals with the methodology of non-destructive and semi-destructive testing of wooden structures using the methodology commonly used for the diagnosis of masonry structures, where mortar strength is tested using a so-called Kučera drill, and with verification of the applicability of this method in the testing of wood properties. Kučera drill was specially modified for the purpose of the experiment and its functionality was tested. The depth of penetration of the drill into the test specimen was tested. The article describes the principle of measurement and the design of the initial experiment, but also the pitfalls, which had to be faced.

scholarly journals Assessment of Complex Masonry Structures with GPR Compared to Other Non-Destructive Testing Studies

2014 ◽  
Vol 6 (9) ◽  
pp. 8220-8237 ◽  
Author(s):  
Sonia Santos-Assunçao ◽  
Vega Perez-Gracia ◽  
Oriol Caselles ◽  
Jaume Clapes ◽  
Victor Salinas
Keyword(s):  
Masonry Structures ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

scholarly journals STRUCTURAL ANALYSIS OF WOOD BEAMS BY NON-DESTRUCTIVE METHODS IN RESTORATION WORKS OF THE CATHEDRAL OF MORELIA, MEXICO

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 263-270
Author(s):  
M. I. Carrillo Gómez ◽  
J. R. Sotomayor Castellanos ◽  
D. Raya González
Keyword(s):  
Structural Analysis ◽  
Wave Velocity ◽  
Dynamic Modulus ◽  
Density Wave ◽  
International Council ◽  
Wood Beams ◽  
Mechanical And Physical Properties ◽  
Wooden Structures ◽  
Non Destructive ◽  
Destructive Methods

<p><strong>Abstract.</strong> In the ceiling framework of the capitular hall of the Cathedral of Morelia, the overall state of the beams of the ceiling framework of the capitular hall of the Cathedral of Morelia was diagnosed as deplorable, for which a replacement was put underway for more recently sawed beams. The focus of this investigation was to determine the humidity content of the wood, its density, the wave velocity, the dynamic modulus and the quality factor of a sample of five new beams. These parameters were compared to the medium of five old beams. For the density, wave velocity, dynamic modulus and rigidness, there were no differences found between the old and new beams. The results suggest that the mechanical and physical properties of the new wood beams are equivalent to those of the older ones. Consequently, the strategy of substituting old and deteriorated wood beams for recently sawed ones was successful and complies with the requirements of the International Council of Monuments and Sites as referred to in the principles for the preservation of historical wooden structures.</p>

scholarly journals Innovative methods of non-destructive evaluation of log quality

2021 ◽  
Vol 67 (1) ◽  
pp. 3-13
Author(s):  
Vojtěch Ondrejka ◽  
Tomáš Gergeľ ◽  
Tomáš Bucha ◽  
Michal Pástor
Keyword(s):  
Three Dimensional ◽  
Renewable Resource ◽  
Wood Properties ◽  
Raw Material ◽  
Production Flow ◽  
Visual Evaluation ◽  
Wood Processing ◽  
Pulp Paper ◽  
Non Destructive ◽  
Destructive Methods

Abstract For the sustainability of an important renewable resource, such as wood, it is important to significantly increase the efficiency of its processing. A large part of this raw material ends up in the wood processing industry, where it is used for the production of pulp, paper, construction and furniture timber, floors and others. Therefore, it is very important to gain the knowledge needed for optimal valuation of raw wood material, through quality detection and classification into quality classes. There are many defectoscopic methods working on different physical principles. The most familiar of these methods are semi-destructive and non-destructive, as they do not cause damage to the tree or wood during assessment. The aim of this article is to describe, assess and compare known semi-destructive and non-destructive methods for the assessment of wood properties. This article describes basic visual inspection, basic semi-destructive methods (Pilodyn, Resistograph) and advanced semi-destructive methods (SilviScan®, DiscBot®) as well. Non-destructive methods use mostly acoustic wave motion (acoustic, ultrasonic), high-frequency waves (using georadar, microwave) and methods based on visual evaluation (image, laser). At last, there are X–ray methods with the latest technology using three-dimensional (3D) computed tomography (CT). The implementation of modern non-destructive methods is of great importance for the application of principles of Industry 4.0, where these methods provide collecting of data on the material properties, in its entire production flow of log processing.

Monitoring of constructed and operated buildings

2019 ◽  
Author(s):  
Сергей Леонович ◽  
Sergey Leonovich ◽  
Дмитрий Снежков ◽  
Dmitriy Snezhkov ◽  
Валентин Доркин ◽  
...  
Keyword(s):  
Field Tests ◽  
The European Union ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Ultrasonic Methods ◽  
Wide Range ◽  
Long Term Observation ◽  
Supporting Frame ◽  
Non Destructive ◽  
Destructive Methods

The monograph considers a wide range of issues related to the determination of strength characteristics of concrete by non-destructive methods. The physical principles of the main methods of non-destructive testing of concrete in structures are stated, promising directions of improvement of non-destructive methods are considered. Much attention is paid to the development of ultrasonic methods of concrete testing. The extensive experimental material of laboratory tests and the results of field tests at construction sites, which are considered from the standpoint of the current standards and the introduced norms of the European Union, are presented. The results of long-term observation of deformations of the supporting frame of a high-rise building obtained using an automated monitoring system are presented. It is intended for engineering and technical workers of construction laboratories, designers, specialists engaged in the design and use of non-destructive testing of concrete, and will also be useful to students, undergraduates, graduate students and teachers of higher educational institutions dealing with quality control in construction.

scholarly journals THE ANALYSIS OF METHODOLOGIES FOR TESTING COMPRESSIVE STRENGTH IN MASONRY MORTAR JOINTS / MŪRO SKIEDINIO GULSČIOJOJE SIŪLĖJE GNIUŽDOMOJO STIPRIO TYRIMŲ METODŲ ANALIZĖ

2014 ◽  
Vol 6 (5) ◽  
pp. 514-519 ◽  
Author(s):  
Tomas Šlivinskas
Keyword(s):  
Compressive Strength ◽  
Mechanical Characteristics ◽  
Ultrasonic Waves ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Destructive Testing ◽  
Advantages And Disadvantages ◽  
Mortar Strength ◽  
Non Destructive ◽  
Masonry Mortar

The article analyzes masonry as composite material and presents the factors that affect the mechanical characteristics of masonry. The article also deals with the most frequently used destructive and non-destructive testing methods for the compressive strength of masonry mortar as well as related advantages and disadvantages. Moreover, the analysis of methods for testing ultrasonic waves has been carried out. The article reveals that for using the methodology of testing a mortar bonded wafer, the compressive strength correlation of masonry mortar is set between the ascertainment of masonry mortar strength using a regular mortar testing methodology (LST EN 1015-11:2004) and the compressive strength of mortar possibly taken from masonry joints. The obtained results of an experimental study on the samples have demonstrated that the strength reduction ratio of masonry mortar depends on the compressive strength of mortar. The value of the ratio is increasing with the descending compressive strength of mortar. Šiame straipsnyje nagrinėjamas mūras kaip kompozitinė medžiaga. Apžvelgiami veiksniai, veikiantys mechanines mūro charakteristikas. Išnagrinėti dažniausiai taikomi mūro skiedinio gniuždomojo stiprio tyrimų metodai, pateikti metodų privalumai ir trūkumai. Straipsnyje, taikant klijuotų skiedinio plokštelių bandymo metodiką, nustatyta mūro skiedinio gniuždomojo stiprio priklausomybė tarp mūro skiedinio stiprio nustatymo pagal įprastinę skiedinio bandymo metodiką ir skiedinio, tikėtina, paimto iš mūro siūlės, gniuždomojo stiprio.

scholarly journals Nonconventional concrete hollow blocks evaluation by destructive and non-destructive testing

2013 ◽  
Vol 6 (3) ◽  
pp. 392-398
Author(s):  
M.S. Rodrigues ◽  
G.C.S. Ferreira ◽  
L. Shiroma ◽  
A.L. Beraldo
Keyword(s):  
Portland Cement ◽  
Silica Fume ◽  
Statistical Difference ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
And Control ◽  
Non Destructive ◽  
Destructive Methods

The aim of this study was to evaluate cementitious matrices properties by partial replacement of Portland cement by silica fume (SF) or by rice husk ash (RHA), and their application in nonbearing hollow blocks, tested by destructive and non-destructive methods. The following mixtures were produced: reference (100% of Portland cement) and Portland cement replacement (10% by mass) with SF or RHA. The non-destructive testing showed that the highest values of UPV were obtained for SF-based blocks and RHA-based blocks. The destructive test showed better results for SF-based blocks, but there was no statistical difference between the RHA-based and control ones.

Non-Destructive Testing of Wood Defects Based on Ultrasonic Technology

2013 ◽  
Vol 401-403 ◽  
pp. 1124-1128 ◽  
Author(s):  
Wen Shu Lin ◽  
Jin Zhuo Wu
Keyword(s):  
Wood Products ◽  
Propagation Path ◽  
Propagation Time ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Ultrasonic Technology ◽  
Propagation Parameters ◽  
Old Trees ◽  
Wooden Structures ◽  
Non Destructive

The elm wood samples were tested by the technique of ultrasonic, and the testing results were analyzed by using the statistic software of SPSS. The results showed that the moister content of wood, wood crack, the sizes of holes and numbers of holes have significant influence on propagation parameters and dynamic modulus of elasticity. If there are holes or cracks in the propagation path, the propagation time will be longer, and the propagation velocity and wood modulus will decrease accordingly. The studying results of this paper will provide a sound background for the application of ultrasonic technique in detecting the inner defects of wood products and other wooden structures, and also offer important reference for testing the inner defects of old trees and ancient buildings.

scholarly journals Non-destructive testing methods of assemblies and units of fire and emergency technique

2020 ◽  
Vol 4 (4) ◽  
pp. 389-396
Author(s):  
Виктор Алексеевич Бирюк ◽  
Владимир Николаевич Пасовец ◽  
Марк Михайлович Журов
Keyword(s):  
Computer Simulation ◽  
Welded Joints ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Destructive Testing ◽  
Modern Methods ◽  
And Control ◽  
Emergency Equipment ◽  
Non Destructive ◽  
Destructive Methods

Purpose. The substantiation of the use of modern methods for assessing and monitoring the state of fire and emergency equipment in order to ensure its trouble-free operation. Methods. Non-destructive methods, computer simulation, tensometry. Findings. The review of methods existing for assessment and control of assemblies and units of fire and rescue vehicles technical state is performed. Some results of their application are presented. The application possibility of non-destructive testing methods is assessed. Application field of research. Fire rescue equipment, welded joints of technical objects.

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