(19 02-13)--ndt tests & their importance

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  • Surya Prakash 77/08
  • (19 02-13)--ndt tests & their importance

    1. 1. NDT Tests and their importancePRESENTED BY:-Rajesh KumarChanchal sonkarM.Tech.-2nd sem
    2. 2. OUTLINENDT tests on concreteConclusionREFERENCES
    3. 3. NDT tests on concrete Rebound Hammer:- (IS 13311(Part 2:1992)(1) Based on principal of rebound of an elastic mass(2) Use to measure compressive strength of concrete(3) 4 Types available(i)N M15-M45(ii) L For light weight concrete, sensitive part(iii) P Bellow M15(iv) M Above M45
    4. 4. Ultrasonic Pulse Velocity Meter(IS 13311(Part 2:1992) Use to measure ultrasonic velocity in StructureTo access density uniformity and homogeneity ofconcreteExcellent - above 4.5 km/secGood – 4.5 km/secMedium – 3.0 to 3.5 km/secPoor - 3.0 km/sec
    5. 5. Cut and Pullout To measure the compressive strength of concreteBy making hole 15 mm depth and 18 mm dia
    6. 6. Core cutterTo access for compressive strength of concreteCore size – 50 mm to 70 mmLength to Dia ratio – 1 to 2
    7. 7. Permeability test• Use to measure permeability of surface coating• To access quality of concrete, densityVery Bad > 10Bad 1 to 10Normal .1 to 1Good .01 to .1Very Good < .1
    8. 8. Video Borescope• To view internal condition of structure By making holes
    9. 9. Corrosion Analyzer Based on electrochemical technique , half cell potential 90% chance not corrosion- < -200 mvTransient phase -200mv to -350 mv90 % chance of corrosion. >-350 mv
    10. 10. Resistivity MeterTo assist corrosion of steel by measuring resistance ofsteel wireNo corrosion R >12 Kohm.cmCorrosion is possible R 8 to 12Kohm.cmCorroded R< 8kohm.cm
    11. 11. Eddy Current Meter• Used to detect crack in metal structure
    12. 12. Infra Red thermal imager• To see thermal image of cracks point and stress point
    13. 13. Acoustic Emission Technique• To detect crak in steel bridges in hidden locationInstrument:-6 channel SPARTAN 2000 SYS6 Channel MISTRAS 2001 SYSSensor ranging 30 khz -300 khzPC and connecting cable
    14. 14. Digital Ultrasonic distance meter• Used to measure length , area and volume• Use laser beam for measuring dimensions
    15. 15. Conclusion NDT instrument provide strength , reinforcement bar dia,cracks ,corrosion in bards , easy assessment torepairing using these instrument we can preventsaccidents.
    16. 16. REFERENCES http://www.engineeringtoolbox.com/ndt-nondestructive-testing-d_314.html http://www.metso.com/pulpandpaper/mpwgeneral.nsf/webwid/wtb-111019-2256f-eb3fd/$file/ndt.pdf http://www.ndted.org/AboutNDT/aboutndt.htm http://wwwpub.iaea.org/MTCD/publications/PDF/TCS-13.pdf

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