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. In addition, influence of test conditions and some general guidance on the interpretation of test results are also given. 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. Ultrasonic testing of concrete is an effective way for quality assessment and uniformity, and crack depth estimation. The ultrasonic pulse velocity tester systems by olson instruments are designed to identify map voids, honeycomb, cracks, and other damage in concrete, wood, masonry, stone, ceramics, and metal materials. 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. Pulsar2m ultrasonic pulse velocity test instrument onepiece version ultrasonic pulse velocity test instrument onepiece version control of the strength and uniformity of concrete gost 17624, methodical recommendations mds 622. Number of specimens was over 800 received from various construction projects of controlled concrete quality and tested by the hawler. The pulse velocity method is an efficient way to find out quality of concrete in terms of homogeneity in structure. Proceqs pundit pl200 and pundit pl200pe are bestinclass nondestructive testing instruments for assessing the quality of concrete and other materials such as rock, wood and ceramics. A wide variety of ultrasonic testing concrete options are available to you, such as usage, power. Application of ultrasonic pulse velocity to detect. The ultrasonic testing method is based on the use of equipment composed of transducers which produce and receive the. Insofar as we are primarily interested in the evaluation of the strength of concrete onsite.
The test procedure has been standardized as standard test method for pulse velocity through concrete astm c 597, 2016. Review of the ultrasonic pulse velocity evaluating. Ultrasonic testing of concrete civil engineering portal. Knowing the distance between the two points, the velocity of the wave pulse can be determined.
Ultrasonic pulse echo technology is excellent for detecting variations in the thickness of concrete structures. The ultrasonic pulse velocity upv systems are designed to identify and map voids, honeycomb, cracks, delaminations, and other damage in concrete, wood, masonry, stone, ceramics, and metal materials. Ultrasonic pulse velocity method of non destructive test. Ultrasonic pulse velocity method civil engineering. Upv tests are also performed to predict strength of early age concrete. Apr, 2017 ultrasonic testing of concrete is an effective way for quality assessment and uniformity, and crack depth estimation. This method can be used for detecting internal cracking and other defects as well as changes in concrete such as deterioration due to aggressive chemical environment and freezing and thawing. This unit comes standard with a test bench designed to handle a variety of modes of vibration, including longitudinal, torsional and flexural.
Ultrasonic concrete testing use sound or stress waves in order to determine the properties of concrete and other materials nondestructively. Ultrasonic testing analysis of concrete structure based on. It is therefore possible to obtain information about the properties of components by sonic investigation. These in turn are related to the quality and the strength of the material. Ultrasonic testing equipment for concrete humboldt mfg. In order to better understand the regularity of nonlinear parameters. A common example is ultrasonic thickness measurement, which tests the thickness of the test object, for example, to monitor pipework corrosion. Ultrasonic testing ut is a nondestructive testing techniques based on the propagation of ultrasonic waves in the object or material tested ultrasonic testing. What is curing of concrete and different methods of curing electronic timing device.
The vmeter is an advanced ultrasonic, pulsevelocity test system widely used for quality control and evaluation of concrete structures. An example of this is the use of nonlinear ultrasonic test and or acoustic emission test. Model 102 cute102 x0 is a portable instrument for nondestructive evaluation nde of concrete quality by ultrasonic pulse velocity upv measurement method. 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. During the test, the test result is available and the graphic distribution of abnormal points in each profile is shown at any time. The specimens used in the study were made of concrete with a varied cube compressive strength from 18 to 55mpa. Feb 07, 2014 subtitles available in 11 languages proceqs pundit pl200 and pundit pl200pe are bestinclass nondestructive testing instruments for assessing the quality of concrete and other materials. Nondestructive testing of concrete methods of test. Ultrasonic testing procedure for concrete structure. Oretaeffect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test j. About 63% of these are testing equipment, 12% are industrial metal detectors, and % are other test instruments.
Jun 07, 2018 this video animation, animated video explains the concept ultrasonic pulse velocity test for concrete. Among these methods, ultrasonic testing plays an important role with its convenience of use and reasonable cost. With the recent advancement in transducer technology, the test has been widely accepted in testing concrete materials. Astm c 59783 91 standard test method for pulse velocity through concrete. The test which is carried out on the site on the existing structural member of concrete. Standard test method for integrity testing of concrete deep. Pdf ultrasonic pulse velocity analysis in concrete specimens. Compressive strength formula for concrete using ultrasonic pulse velocity prof. When the pulse generated is transmitted into the concrete from the transducer using a. D676016 standard test method for integrity testing of concrete deep foundations by ultrasonic crosshole testing ultrasonic cross hole test augercast piles bored piles diaphragm walls ultrasonic probes dams drilled shaft. The pulse velocity in a material is directly proportional to its density and its elastic properties which in turn depends on the compressive strength and the quality of the concrete. Ultrasonic pulse velocity tester concrete testing pcte. Commonly called the ultrasonic pulse velocity upv is a comprehensive method, which. In particular, the panorama bscan function of the pundit 250 array is ideally suited for this.
The main reason of non destructive test is to check the actual strength of concrete other than cube compression. 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. Application of ultrasonic pulse velocity to detect concrete flaws. This test is done to assess the quality of concrete by ultrasonic pulse velocity method as per is. In this test method, the ultrasonic pulse is produced by the transducer which is held in contact with one surface of the concrete member under test. The expected thickness of the slab is approximately 15 inches 376 mm. Nondestructive testing of concrete methods of test lecture no. Civil engineering animated videos, civil engineerin. The ultrasonic equipment used was the pundit pl200 sonicator from the swiss company proceq sa figure 7. Nonlinear ultrasonic test of concrete cubes with induced.
Nondestructive material testing with ultrasonicsis more than 40 years old. The pulse velocity in a material depends on its density and its elastic properties. Changes in the structure of the concrete which may occur with time, 4. Ultrasonic testing is known as ut or ultrasonic pulse velocity test or upv test. The following eight standards are analyzed in this paper. Ultrasonic concrete testing is based on the pulse velocity method to provide information on the uniformity of concrete, cavities, cracks and defects. In this test no structural member is affected so this is called non destructive test. Slab testing approach preliminary testing the ultrasonic pulse echo method was used to test a 12 foot by 8 foot reinforced concrete slab. Rilemndt 1 1972 testing of concrete by the ultrasonic pulse method. Ultrasonic pulse velocity analysis in concrete specimens. 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 test concrete we offer the services for testing concrete where the velocity of ultrasonic pulses is measured and identification of cracks, voids, strength, and elasticity is checked to determine the areas which can provide the basis for recognizing the defects. Review of the ultrasonic pulse velocity evaluating concrete. It can identify nonhomogeneous conditions such as voids, cracks, honeycombs and frozen concrete.
Depending on the test requirements, these waves can be highly directional and focused on a small spot or thin line, or limited to a very short duration. It is used to measure the transmission time of ultrasonic pulses in the test specimen, from which the velocity can be computed. Features of beijing zbl ultrasonic compressive strength of cement testing tool 1. An ultrasonic wave is a mechanical vibration or pressure wave similar to audible sound, but with a much higher vibration frequency. The electronic timing device is capable of measuring the time travel of pulse at the transmitting transducer and the onset of its arrival at the receiving transducer. The ultrasonic testing method is based on the use of equipment composed of transducers which. The quality of the concrete in relation to standard. Based on the ultrasonic transmission detection principle, we conducted tests on the concrete specimen. Khaleel 1 professor of civil engineering, ishik university, erbil, iraq. Measuring concrete thickness with ultrasonic pulse echo. 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. The mira is suitable for imaging of the internal structure of objects constructed of concrete and reinforced concrete using pulseecho technique of testing. It specifies a method for the determination of the velocity of propagation of pulses of ultrasonic longitudinal waves in concrete. This example shows how a typical structural assessment can be carried out.
Focusing on it, the ultrasonic tests allow to estimate a correlation between the variables and the compressive strength. Ultrasonic pulse velocity test on concrete civiconcepts. Ultrasonic testing of concrete or ultrasonic pulse velocity test on concrete is a nondestructive test to assess the homogeneity and integrity of. Note in view of the limitations of each method of nondestructive testing of concrete, it is essen. Why we use non destructive test over cube compression test. For pricing and product info, give us a call today. Non destructive testing ultrasonic tester based on the pulse velocity method to provide information on the uniformity of concrete, cavities, cracks and defects.
Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, wood and composites, albeit with less resolution. The upv methodology relies on direct arrival of compressional waves. Standard test method for integrity testing of concrete. Ultrasonic testing of concrete is an insitu, nondestructive test to check thickness measurements of concrete and tunnel linings. Concrete defects sizing by means of ultrasonic velocity maps mdpi. 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. Ultrasonic pulse velocity testing, mainly used to measure the sound velocity of the concrete and hence the compressive strength of the concrete. Apr 21, 2018 explain in detail the ultrasonic pulse velocity method of non destructive test of concrete. The reinforcement consists of a 5 inch by 5 inch no. 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. The data are used to confirm adequate concrete quality or identify zones of poor quality. This test allows to measure and to control a series of basic. This video animation, animated video explains the concept ultrasonic pulse velocity test for concrete.
The upv methods have been used in inspection operations and monitoring of concrete structures. Ultrasonic pulse velocity test of concrete properties as. The ultrasonic pulse velocity method has been used successfully to evaluate the quality of concrete for more than 60 years. What is ultrasonic testing of concrete for compressive. Mira ultrasonic concrete tomography introduction the mira uses a lowfrequency linear ultrasonic antenna array to produce high resolution tomographical images of concrete. If defects are detected, then further investigations should be made by. Civil engineering animated videos, civil engineering videos social media links. Ultrasonic pulse velocity ultrasonic concrete tester. The apparatus for ultrasonic pulse velocity measurement consists of the following. For each section the data has been digitized and presented as a map of concrete thickness in the form of a cscan presentation, as shown in fig.
Nondestructive test ndt techniques of ultrasonic pulse velocity and schmidt rebound hammer tests are commonly used to estimate concrete strength, but the applicability is dependent on. In this method, the time required to travel of an ultrasonic pulse. The ultrasonic pulse echo method was used to test a 12 foot by 8 foot reinforced concrete slab. Unlike many other materials traditionally tested by ndt, the velocity of ultrasonic wave propagation in concrete cannot be predicted accurately. Ultrasonic pulse velocity test it measures the time of travel of an ultrasonic pulse passing through the concrete. Ultrasonic testing analysis of concrete structure based on s. After traversing a known path length q in the concrete, the pulse of vibrations is converted into an electrical signal by the second. Another way of testing concrete structure is the use of test that is sensitive to microcrack damages. Nov 11, 2019 ultrasonic pulse velocity test on concrete.
The vmeter comes with standard 54khz transducers, and its large easytoread display is perfect for field use. What is ultrasonic testing of concrete for compressive strength. The presence of cracks,voids and other imperfections, 3. For ndt purposes, the range is usually from 1mhz to 30mhz. It is better if similar concrete at the same time be tested with one more nondestructive test method, such as concrete test hammer etc. In most common ut applications, very short ultrasonic pulsewaves with center frequencies ranging from 0.
Three levels of test voltage are applied to intact concrete specimens, with the purpose to demonstrate the excitation voltage has an unneglectable effect. Ultrasonic pulse velocityecho testing of concrete, rock. Ultrasonic pulse velocity method of non destructive test of. 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 rilem, are evaluated. Ultrasonic tester non destructive testing concrete.
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