Seminar PPT

1. SL.
NO.
VTU NO. REG. NO. NAME SIGNATURE
WITH DATE
SIGNATURE OF THE
SEMINAR GUIDE,
NAME & ID
1. 5917 15UECV0002 ABIRAMI.P
BATCH NO: REVIEW NO:0/1/2/3/4
DATE: / /2018
1156CE502- SEMINAR II
TITLE – NON DESTRUCTIVE TEST'S ON
CONCRETE BULIDING

2. NON DESTRUCTIVE TESTING
Literature Review
Purpose
Advantage and disadvantage
Types
Rebound Hammer Test
Half Cell Electrical
Potential Test Radiography Test
Ultrasonic Pulse
Velocity Test
METHODOLOGY

3. LITERATURE REVIEW
[1] Lim, M.K. and Cao, H., “Combining multiple NDT methods to improve testing effectiveness,”
Construction and Building Materials, vol. 38, pp. 1310–1315, 2013.
NDT has been defined as comprising methods used to examine objects, materials, or systems without
impairing their future usefulness, that is, inspect or measure without harm. NDT methods are now considered
as powerful tools for evaluating existing concrete structures with regard to their strength and durability. NDT
methods have been drawing more and more attention, in the sense of reliability and effectiveness. The
importance of being able to test in situ has been recognized, and this trend is increasing as compared to
traditional random sampling of concrete for material analysis.
[2] Proverbio , E. and Venturi, V., “Reliability of nondestructive tests for on site concrete strength
assessment,” 10DBMC, Lyon, France, 2005.
Proverbio and Venturi evaluated the reliability of rebound hammer test and UPV test on concrete of
different composition and strength.
[3] Rens, K.L. and Kim, T., “Inspection of Quebec street bridge in Denver, Colardo: destructive and
nondestru testing,” Journal of Performance of Constructed Facilities, vol. 21, no. 3, pp. 215–224, 2007.
Rens and Kim inspected a steel bridge using several NDT methods such as visual inspection, ham-
mer sounding, Schmidt hammer, and UPV testing including tomographic imaging; results of NDT had been
used to determine areas, to be tested with local destructive tests such as compressive strength, chloride
testing, and petrographic testing. Magnetic concrete cover meters are widely used to estimate the cover to
steel bars.

4. LITERATURE REVIEW
[4] Rens, K.L. and Kim, T., “Inspection of Quebec street bridge in Denver, Colardo: destructive and
nondestru testing,” Journal of Performance of Constructed Facilities, vol. 21, no. 3, pp. 215–224, 2007.
Rens and Kim inspected a steel bridge using several NDT methods such as visual inspection, ham-mer
sounding, Schmidt hammer, and UPV testing including tomographic imaging; results of NDT had been used
to determine areas, to be tested with local destructive tests such as compressive strength, chloride testing,
and petrographic testing. Magnetic concrete cover meters are widely used to estimate the cover to steel bars.
[5] Shaw, P. and Xu, A., “Assessment of the deterioration of concrete in NPP- causes, effects and
investigation methods,” NDT.Net, vol. 3, no. 2, 1998.
According to P.Shaw and A.Xu, NDT methods has been categorized as: penetration tests, rebound tests,
pull out tests, dynamic tests, and radioactive methods.
[6] Stergiopoulou, C., Aggour, M.S. and McCuen, R.H., “Non de-structive testing and evaluation of
concrete parking garages,” Journal of Infrastructure Systems, vol. 14, no. 4, pp. 319–326, 2008.
Stergiopoulou presented a procedure for NDT of urban concrete infrastructures using UPV measurements
and applied to 3 concrete garages. UPV has been used as an indicator of concrete quality.

5. TESTING
Non-destructive Destructive
CONCRETE
TESTING
 Does not destroys the
test specimen
 after testing, allow the
part to be used for its
intended purpose
 Carried out until
specimen’s failure
 will render the part
unusable for its
intended purpose

6. HOW NDT INVESTIGATION HELPS IN
ASSESSMENT ?
• REBOUND HAMMER TEST: To Estimate Strength And Hardness Of The
Concrete In The Cover Region(IS: 13311 Part II)
• UPV TEST: To Measure Homogeneity, Uniformity, Compactibility And
Presence Of Crack Or Void, Thus Representing Durability Of Concrete (IS:
1311 Part I)
• CORE TEST: To Evaluate In Situ Compression Strength Of Concrete (IS
516 & ASTM C42/41)
• COROSION ASSESSMENT: Half Cell Potential (ASTM C876-9),
Resistivity And RCPT (ASTM C1202), To Know About Extent And Rate Of
Ongoing Corrosion Activity.
• BAR LOCATOR AND COVER METER: To Know The Structure Strength
And Protection To The Reinforcement By Cover Concrete.
• CARBONATION: To Evaluate Extent Of Carbonation For Strength And
Corrosion Estimation.

7. REBOUND HAMMER TEST
OBJECTIVES:
► To assess quality of the concrete in relation to the standard requirements.
Fig : 1
►To delineate regions of poor quality or deteriorated concrete in a structure
► To assess quality of one element of the concrete in relation to another .
https://goo.gl/images/x1ZQQy

8. MECHANISM AND INTERPRETATIONS
Is 1311(part1):1992
https://goo.gl/images/HAcdhcFig : 2

9. ULTRASONIC PULSE VELOCITY TEST
OBJECTIVES:
► The homogeneity of the concrete
► The presence of cracks, voids and other
imperfections
► Changes in the structure of the concrete
which may occur with time
► The quality of the concrete in relation to
standard requirements
PRINCIPLE:
The method is based on the principle that the velocity of an ultrasonic pulse
through any material depends upon the density, modulus of elasticity of material.
Fig : 3 https://goo.gl/images/vLuxc8

10. APPARATUS AND INTERPRETATIONS
The UPV equipment includes a
transducer, a receiver and an
indicator for showing the time of
travel from the transducer to the
receiver.
Fig : 4 https://goo.gl/images/voDkUR
No Pulse velocity
(km/s)
Concrete
Quality
1 Above 4.5 Excellent
2 3.5 to 4.5 Good
3 3.0 to 3.5 Medium
4 Below 3.0 Doubtful
Is 1311(part1):1992

11. HALF – CELL ELECTRICAL POTENTIAL
METHOD
► Corrosion analyzer is based on electro
chemical process todetect corrosion in the
reinforcement bar of the structure.
►The instrument measures the potential
and the electrical resistance between the
reinforcement and the surface to evaluate
the corrosion activity. Fig : 5 https://goo.gl/images/thTMHq
Fig : 6

12. HOW IT WORKS?
If there is no corrosion on
rebars, potential difference
does not occurs.
If there is corrosion on
rebars, potential
difference occurs.

13. EVALUATION
Guidebook of NDT, IAEA (International Atomic Energy
Agency )

14. RADIOGRAPHY
PRINCIPLE
► When radiographic rays are directed into an object, some of the
photons interact with the particles of the matter and their energy can be
absorbed or scattered. This absorption and scattering is called
“Attenuation”.
► The relationship between the intensity of photons incident and transmitted is:
where
I is transmitted photon intensity,
I0is incident photon intensity,
µ is attenuation coefficient,
x is thickness of object
RILEM STAR -207 [State-of-the-Art Reports]

15. EFFECT OF ATTENUATION
► As the radiation passes through the member its intensity is
reduced according to the thickness, density and absorption
characteristics of the materials within the member.
► The quantity of radiation passing through the member is recorded on
a film.
Fig : 7 https://goo.gl/images/NoSbYB https://goo.gl/images/fi3y61Fig : 8

16. SETUP FOR CONCRETE TEST
www.novo-dr.com
Reinforcing bars absorb more energy than the surrounding
concrete and show up as light areas on the exposed film.
Fig : 9 Fig : 10

17. REFERENCES
• Lim, M.K. and Cao, H., “Combining multiple NDT methods to improve testing
effectiveness,” Construction and Building Materials, vol. 38, pp. 1310–1315, 2013.
• Proverbio , E. and Venturi, V., “Reliability of nondestructive tests for on site concrete
strength assessment,” 10DBMC, Lyon, France, 2005.
• Rens, K.L., Nogueira, C.L., and Transue, D.J., “Bridge management and nondestructive
evaluation,” Journal of Performance of Constructed Facilities, vol. 19, no. 1, pp. 3–16,
2005.
• Rens, K.L. and Kim, T., “Inspection of Quebec street bridge in Denver, Colardo:
destructive and nondestru testing,” Journal of Performance of Constructed Facilities, vol.
21, no. 3, pp. 215–224, 2007.
• Shaw, P. and Xu, A., “Assessment of the deterioration of concrete in NPP- causes, effects
and investigation methods,” NDT.Net, vol. 3, no. 2, 1998.
• Stergiopoulou, C., Aggour, M.S. and McCuen, R.H., “Non de-structive testing and
evaluation of concrete parking garages,” Journal of Infrastructure Systems, vol. 14, no. 4,
pp. 319–326, 2008.

18. VIDEO LINKS
• https://youtu.be/-MbVlyyRl0Y
• https://www.youtube.com/watch?v=BALvC5azIFw
• https://www.youtube.com/watch?v=Wptu6yM44UU
• https://youtu.be/IcWjZbXiFkM
• https://youtu.be/WU5zY9RgKzM
• https://youtu.be/CWhb8x47G5U
• https://youtu.be/49Tw245g6aE
• https://youtu.be/7oR_l8nXdmo

19. THANK YOU