Ultrasonic Pulse Velocity for In Situ Measurement of Compressive Strength of Concrete

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In this study, pulse velocities calculated from the time taken by pulses emitted by a transducer to traverse a known thickness of the concrete is utilized in building up a correlation between pulse velocity and strength of concrete cubes and between pulse velocity and age of concrete. Three different arrangements of transmitters and receivers were studied to cover the varieties of problems likely to be encountered on a site. These are direct transmission, semi-direct transmission and indirect transmission. For a particular mix proportion and aggregate size a calibration curve was obtained for in-situ testing of concrete. These curves can be used to determine the relative in-situ strength of similar members or structures.

Info:

Periodical:

Advanced Materials Research (Volumes 18-19)

Edited by:

Prof. A.O. Akii Ibhadode

Pages:

55-61

Citation:

C.A. Chidolue et al., "Ultrasonic Pulse Velocity for In Situ Measurement of Compressive Strength of Concrete ", Advanced Materials Research, Vols. 18-19, pp. 55-61, 2007

Online since:

June 2007

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$38.00

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[11] Y. Akkaya, Nondestructive measurement of concrete strength gain by an ultrasonic wave reflection method, Materials and Structurea, 2003, I T I North Western edu. Fig 1: Measurement of Indirect Pulse Transmission Time Table 1: Mix Design Table 2: Test Results Constituent Quantity in Kg/m3 of Concrete Description Cement Sand Coarse aggregate Free Water 225 600 1335 210 ordinary Portland cement zone 3 fine 20mm max. size of graded gravel to BS 882 water / cement ratio = 0. 933 Compressive Strength of Concrete N/mm2 Pulse Velocity , Km/s Direct Method Age, Days Cured In Air Cured I n Water Path Length.

DOI: https://doi.org/10.1617/13854

[1] 804m Path Length.

889m SemiDirect Method Indirect Method 1 2 3 4 6 7 14 21 28.

[6] 9.

[16] 3.

[18] 2.

[20] 0.

[22] 8.

[27] 9.

[29] 0.

[31] 7.

[19] 9.

[29] 9.

[31] 0.

[35] 5.

[35] 0.

[3] 8.

[3] 85.

[3] 92.

[3] 95.

[4] 02.

[4] 03.

[4] 04.

[3] 38.

[3] 69.

[3] 83.

[3] 90.

[3] 97.

[4] 00.

[4] 04.

[4] 06.

[4] 07.

[3] 76.

[3] 91.

[4] 00.

[4] 01.

[4] 12.

[4] 12.

[4] 19.

[3] 08.

[3] 47.

[3] 71.

[3] 88.

[4] 13.

[4] 17.

[4] 17 ll Fig. 2 Variation of Semi-direct & Indirect pulse Fig. 3 Variation of pulse velocity with Velocities with Direct pulse velocity Age of concrete Fig. 4 Correlation Curves Showing Variation Fig. 5 Variation of Cube Strength with of Pulse Velocity with Cube Strength Age of concrete.

DOI: https://doi.org/10.1016/0008-8846(89)90042-2

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