Ultrasonic testing of concrete fprimec solutions inc. Common structures are assessed with the use of practical and. Measure concrete thickness with ultrasonic pulse echo proceq. This book covers the latest syllabus prescribed by anna university, chennai for mechanical, mechatronics, aeronautical, automobile students of all. In particular, the panorama bscan function of the pundit 250 array is ideally suited for this. The presence of cracks,voids and other imperfections, 3. Ultrasonic pulse velocity test of concrete properties as. The standard method of evaluating the quality of concrete in buildings or structures is to test specimens cast simultaneously for compressive, flexural and tensile strengths. Ultrasonic testing procedure for concrete structure. Why we use non destructive test over cube compression test. This example shows how a typical structural assessment can be carried out. The data are used to confirm adequate concrete quality or identify zones of poor quality. The underlying principle of this test is the method consists of measuring the time of travel of an ultrasonic pulse passing through the concrete being tested.
It was found that pulse velocity decreased with increase of temperature at. Experimental evaluation of cracks in concrete by ultrasonic pulse velocity t sri kalyan 1, a and j. Ultrasonic pulse velocity test it measures the time of travel of an ultrasonic pulse passing through the concrete. Test procedure the reading is very sensitive due to local variation in the concrete, especially to aggregate particles near to the surface. Evaluation of condition of concrete structures using ultrasonic. Based on these syllabi, training course notes have been produced to cover industrial radiography iaea training course series no. Ultrasonic testing of concrete or ultrasonic pulse velocity test on concrete is a nondestructive test to assess the homogeneity and integrity of. Download non destructive testing of materials by dr. Dipenetration test, magnetic particle testing, and ultrasonic testing are the various nondestructive tests ndt carried out. In this test no structural member is affected so this is called non destructive test.
It measures the transit time of ultrasonic pulses through concrete for inspection of new and old structures, slabs, columns, walls, fire damaged areas, precast and prestressed beams, cylinders and other concrete forms. Discussion advantages and disadvantages of the ultrasonic pulse velocity test. In this method, the time required to travel of an ultrasonic pulse passing through the concrete is measured. Different acoustic technics used in nondestructive testing for nondestructive testing of concrete cnd, methods based on the propagation of mechanical waves frequently called acoustic waves, the most used are. Combined use of nondestructive tests for assessment of.
Assessing the strength of reinforced concrete structures through ultrasonic pulse velocity and schmidt rebound hammer tests article pdf available in. Minimum age of concrete that enables testing, the most suitable tube material, tube diameter and most advantageous probe spacing. This paper reports on the macroscopic ultrasonic method, which allows measurement of concrete thickness, crack depth and other characteristics using the concrete surface sonic speed. Ultrasonic pulse velocity test consists of measuring travel time, t of ultrasonic pulse of 50 to 54 khz, produced by an electroacoustical transducer, held in contact with one surface of the concrete member under test and receiving the same by a similar transducer in contact with the surface at the other end. Ultrasonic testing analysis of concrete structure based on. Ultrasonic testing of concrete is an effective way for quality assessment and uniformity, and crack depth estimation. The goal of this work was to establish the performance envelope of the method and propose a suitable. Nondestructive testing, ultrasonic pulse velocity, pundit, elastic modulus of concrete, compressive strength of concrete, surface cracks. The ultrasonic equipment used was the pundit pl200 sonicator from the swiss company proceq sa figure 7.
Ultrasonic pulse echo technology is excellent for detecting variations in the thickness of concrete structures. Model 102 cute102 x0 is a portable instrument for nondestructive evaluation nde of concrete quality by ultrasonic pulse velocity upv measurement method. Testing concrete in structures nondestructive testing determination of rebound number. Standard test method for pulse velocity through concrete. Ultrasound auscultation sonic or ultrasonic pulse velocity upv the impactecho. It is better if similar concrete at the same time be tested with one more nondestructive test method, such as concrete test hammer etc. How many times as a civil engineer, you have to test a concrete. Standard test method for integrity testing of concrete.
Ultrasonic pulse velocity method of non destructive test. Pdf nondestructive test has been applied to measure damage in structures. The compressive strength of the concrete was determined later by crushing the prisms. Rebound hammer method the main principle of this test is that it measures the rebound of an elastic mass when it collides with the concrete surface under the test, this rebound depends on the hardness of concrete and on the energy it absorbs from the collision. Ultrasonic pulse velocityecho testing of concrete, rock. For the love of physics walter lewin may 16, 2011 duration. If defects are detected, then further investigations should be made by. M chandra kishen 2,b 1department of civil engineering, indian institute of technology kharagpur, kharagpur, india 2department of civil engineering, indian institute of science, bangalore 560012, india asrikalyan.
Based on the ultrasonic transmission detection principle, we conducted tests on the concrete specimen. Review of the ultrasonic pulse velocity evaluating. An example of this is the use of nonlinear ultrasonic test and or acoustic emission test. It can identify nonhomogeneous conditions such as voids, cracks, honeycombs and frozen concrete. Ultrasonic testing ut is a nondestructive testing techniques based on the propagation of ultrasonic waves in the object or material tested ultrasonic testing. Nondestructive testing is a solution to find the strength of the existing steel structure and its joints such as welds. Assessing the strength of reinforced concrete structures through ultrasonic pulse velocity and schmidt rebound hammer tests article pdf available in scientific research and essays 61. Ultrasonic pulse velocity tester, concrete testing. The quality of the concrete in relation to standard. Methods for the determination of longitudinal pulse velocity and assessment of concrete properties by ultrasonic pulse velocity, as recommended by standards of the uk, usa, germany, russia, slovakia, hungary, and.
The vmeter is an advanced ultrasonic, pulsevelocity test system widely used for quality control and evaluation of concrete structures. Ultrasonic testing of concrete is an insitu, nondestructive test to check thickness measurements of concrete and tunnel linings. What is ultrasonic testing of concrete for compressive. The ultrasonic testing method is based on the use of equipment composed of transducers which produce and receive the ultrasonic. The main reason of non destructive test is to check the actual strength of concrete other than cube compression. This test allows to measure and to control a series of basic. This test is done to assess the quality of concrete by ultrasonic pulse velocity method as per is. Structural defects cause serious damages and collapses. The upv methods have been used in inspection operations and monitoring of concrete structures. Ultrasonic pulse velocity analysis in concrete specimens. The apparatus for ultrasonic pulse velocity measurement consists of the following. Ultrasonic inspection can be used for flaw detectionevaluation, dimensional measurements, material characterization, and more. Ultrasonic testing is one of the nondestructive test method based on the transmission of the ultrasonic pulse in the component or materials like concrete, steel, etc. Mira ultrasonic concrete tomography introduction the mira uses a lowfrequency linear ultrasonic antenna array to produce high resolution tomographical images of concrete.
The mira is suitable for imaging of the internal structure of objects constructed of concrete and reinforced concrete using pulseecho technique of testing. The test which is carried out on the site on the existing structural member of concrete. Pundit ultrasonic pulse velocity, ultrasonic pulse echo. It is used to measure the transmission time of ultrasonic pulses in the test specimen, from which the velocity can be computed. Nondestructive testing of concrete methods of test. Assessment of structural integrity and localization of defects and voids in concrete and rock through ultrasonic testing.
Knowing the distance between the two points, the velocity of the wave pulse can be determined. In this test, the strength and quality of concrete or rock is assessed by measuring the velocity of an ultrasonic pulse passing through a concrete structure or natural rock formation this test is conducted by passing a pulse of ultrasonic through concrete to be. It is also applicable to indicate changes in the properties of concrete, and in the survey of structures, to estimate the severity of deterioration or cracking. Ultrasonic pulse velocity test on concrete civiconcepts. In most common ut applications, very short ultrasonic pulsewaves with center frequencies ranging from 0. Then, compressive strength testing and a nondestructive testing experiment were conducted using the specimens. Learn more about olsons ultrasonic testing and ndt equipment. The ultrasonic pulse velocity test is performed on concrete to asses the quality of concrete by passing ultrasonic pulse velocity through it as per is.
Our technology tests structures, pavements, and foundations through our concrete, asphalt, masonry, wood, soil, and rock. In the ultrasonic pulse velocity test method, an ultrasonic wave pulse through concrete is created at a point on the surface of the test object, and the time of its travel from that point to another is measured. Ultrasonic testing is known as ut or ultrasonic pulse velocity test or upv test. Concrete, corrosion, nondestructive test, ultrasonic pulse velocity. Ultrasonic pulse velocity and rebound hammer studies on. However, the results of the test on concrete are affected by various factors such. Another way of testing concrete structure is the use of test that is sensitive to microcrack damages. Ultrasonic pulse velocity testing, mainly used to measure the sound velocity of the concrete and hence the compressive strength of the concrete. Guidebook on nondestructive testing of concrete structures.
When the pulse generated is transmitted into the concrete from the transducer using a. Proceqs pundit pl200 and pundit pl200pe are bestinclass nondestructive testing instruments for assessing the quality of concrete. Non destructive testing of structures linkedin slideshare. In this method, the time required to travel of an ultrasonic pulse passing through the concrete. The experimental studies using ultrasonic pulse velocity and schmidt rebound hammer as nondestructive tests ndt were presented in this paper to establish a correlation between the compressive strengths of compression tests and ndt values. Ultrasonic pulse velocity method civil engineering. Ultrasonic testing provides information on the strength and uniformity of concrete, rock, composites. Determine the compressive strength of concrete by using digischmidt 2000 concrete test hammer 3. Changes in the structure of the concrete which may occur with time, 4. The test procedure has been standardized as standard test method for pulse velocity through concrete astm c 597, 2016. Elangovan we are pleased to bring out our fully revised new edition of non destructive testing of materials book for engineering and technology studies. The standard rebound hammer provides a simple, easy and inexpensive method to estimate concrete strength properties. During the concrete testing process, the centre frequency of the ultrasound probe was 54 khz, the sampling interval was, and the sampling point number was 7,928. What is ultrasonic testing of concrete for compressive strength.
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