scholarly journals Analysis of the single and combined non-destructive test approaches for on-site concrete strength assessment: General statements based on a real case-study

2017 ◽  
Vol 6 ◽  
pp. 109-119 ◽  
Author(s):  
Khoudja Ali-Benyahia ◽  
Zoubir-Mehdi Sbartaï ◽  
Denys Breysse ◽  
Said Kenai ◽  
Mohamed Ghrici
Keyword(s):  
Concrete Strength ◽  
Real Case ◽  
Strength Assessment ◽  
Destructive Test ◽  
Non Destructive

PENGKAJIAN KEKUATAN BETON STRUKTUR JEMBATAN PASCA KEBAKARAN

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Sudarmadi Sudarmadi
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Strength Assessment ◽  
Concrete Testing

In this paper a case study about concrete strength assessment of bridge structure experiencing fire is discussed. Assessment methods include activities of visual inspection, concrete testing by Hammer Test, Ultrasonic Pulse Velocity Test, and Core Test. Then, test results are compared with the requirement of RSNI T-12-2004. Test results show that surface concrete at the location of fire deteriorates so that its quality is decreased into the category of Very Poor with ultrasonic pulse velocity ranges between 1,14 – 1,74 km/s. From test results also it can be known that concrete compressive strength of inner part of bridge pier ranges about 267 – 274 kg/cm2 and concrete compressive strength of beam and plate experiencing fire directly is about 173 kg/cm2 and 159 kg/cm2. It can be concluded that surface concrete strength at the location of fire does not meet the requirement of RSNI T-12-2004. So, repair on surface concrete of pier, beam, and plate at the location of fire is required.

X-ray Advances in Support of Advanced Packaging – Today and Tomorrow

2018 ◽  
Vol 2018 (1) ◽  
pp. 000409-000414
Author(s):  
David Bernard
Keyword(s):  
Heat Dissipation ◽  
X Ray ◽  
Destructive Test ◽  
Heat Transfer Efficiency ◽  
Advanced Packaging ◽  
History Of ◽  
Production Output ◽  
2D And 3D ◽  
Non Destructive

Abstract As advanced packaging continues to develop to support novel and emerging technologies, the need for, ideally non-destructive, test and inspection continues to be vital to ensure the quality and assurance of functionality, wherever the package may go. This is made ever more difficult as the package complexity increases, whilst the feature sizes within continue to decrease. X-ray technology has long been an important part of the non-destructive inspection protocol over the history of advanced packaging and will continue to need to play a more important part in the future. This paper will review the advances made in both 2D and 3D X-ray inspection over recent years and the new opportunities that are now starting to be available, especially in 3D, or CT, inspection, that will enable this 120-year-old technology to remain relevant to and supportive of the needs of advanced packaging. To highlight the above, a case study will be presented on the faults that 2D and CT X-ray analysis can find in LEDs during their manufacture. LEDs are a good example of the remarkable developments in packaging and technology over the last 20 years, where the use of higher powers, smaller sized features and increased reliability requirements intensify the need for higher quality, more consistent production output. Flaws cannot be accepted, especially as higher usage powers mean higher operating temperatures which, in turn, then requires very good thermal conductivity in the package to move heat away from key areas. Without good heat dissipation then heat stresses at the interfaces can cause delamination or die fractures, so reducing LED lifetimes. The presence of voids, particularly at the die to package interface, creates air gaps that reduces heat transfer efficiency. As many LEDs are potted, or encapsulated, the only non-destructive test option to check for voiding and other faults is by using 2D and CT X-ray analysis.

Commercial Concrete Quality Test

2012 ◽  
Vol 193-194 ◽  
pp. 887-890
Author(s):  
Jin Yang Zhang
Keyword(s):  
Structural Strength ◽  
Concrete Strength ◽  
Strength Test ◽  
Quality Test ◽  
Primary Analysis ◽  
Core Drilling ◽  
Destructive Test ◽  
Reasonable Explanation ◽  
Concrete Quality ◽  
Non Destructive

The appearance of commercial concrete has heightened architectural construction level, improved construction civilization and offered the guarantee of the popularization and application of new tech significantly. Meanwhile, its popularization has brought the issues of structural solid concrete strength test and early plastic cracks. Currently, the solution for commercial concrete structural strength test is mainly done by means of method of non-destructive test of core-drilling correction. Merely the primary analysis can be done over the early plastic cracks to find no reasonable explanation toward those cracks, nor define the responsibilities of the related subjectival responsible parts that cause the cracks.

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.

scholarly journals The Use of Destructive and non Destructive Testing in Concrete Strength Assessment for a School Building

2019 ◽  
Author(s):  
Vincenzo Minutolo ◽  
Stefania Di Ronza ◽  
Caterina Eramo ◽  
Renato Zona
Keyword(s):  
Concrete Strength ◽  
Calibration Procedure ◽  
Experimental Investigations ◽  
School Building ◽  
Destructive Testing ◽  
Strength Assessment ◽  
Existing Building ◽  
Engineering Department ◽  
The University ◽  
Non Destructive

The present paper aims to increase knowlodge of the methods of resistance estimating of concrete in situ by means of non-destructive tests used to integrate the quantitative results from cylindrical specimens (core). The results of experimental investigations carried out on concrete conglomerate samples of a school building are shown. The experimental campaign then will be presented like a case study, conducted on a series of concrete beams and pillars of an existing building. The distructive tests on cores were conducted at the Civil Structures Laboratory of the Engineering Department of the University of Campania "Luigi Vanvitelli". The expression obtained through the calibration procedure of the values of non-destructive tests with those provided by the core drills allowed to estimate the average values of the compressive strength of the concrete. It is highlighted how this result was achieved with a very limited core number provided that they are extracted in selected points and that there was a proportionality link with the resistances obtained from non distructive tests.

Variability ofin-situHMA volumetric and mechanistic characteristics using non-destructive test (NDT): case study

2012 ◽  
Vol 13 (2) ◽  
pp. 110-125 ◽  
Author(s):  
Mohammad Khattak ◽  
Louay Mohammad ◽  
Feng Yuan ◽  
Chris Abadie
Keyword(s):  
Destructive Test ◽  
Non Destructive
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