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NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

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Page 1: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD

TIES

Paul Fisk, NDT Corporation

Page 2: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

CORPORATION

Nondestructive Concrete Testing Services 18 Years-600+ projects Developed Sonic/ultrasonic NDT

Equipment

Page 3: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

BACKGROUND

1.Union Pacific Railroad Call2.Test Out of Service Ties3.Test Siding Ties4.Test Plymouth Commuter Rail5.Comparison of Impact Velocity Results with AMTRAK Rating

Page 4: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

Impact Velocity and Echo Measurements

Impact Velocity MeasurementsCompressional, Shear and Surface Wave VelocityModuli ValuesAverage Dynamic StrengthCrack Density

Impact Echo MeasurementsThicknessDelaminations

NDT CORPORATIONNDT CORPORATION

Page 5: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

Impact Velocity

Impact Echo

NDT CORPORATIONNDT CORPORATION

Page 6: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

Properties Detected by SONIC/ULTRASONIC Testing

Velocity Concrete Condition

(strength, cracking)Thickness Resonant

Frequencies Thickness Delamination

Signal Attenuation Delamination

Sample Test Data

Page 7: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 8: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 9: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 10: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 11: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 12: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 13: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

CONCLUSION

Sonic/ultrasonic results can be used to evaluate and document the current condition of concrete railroad ties

Ties can be classified as Functional Marginally Functional-should be retested in the near

future Non-Functional- take out of service

NDT CORPORATIONNDT CORPORATION

Page 14: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 15: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 16: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 17: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 18: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 19: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 20: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 21: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 22: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

NDT CORPORATIONNDT CORPORATION

Page 23: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

Automated TestingEstimated 1 tie per sec

NDT CORPORATIONNDT CORPORATION

Page 24: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

SUMMARY

Sonic/ultrasonic pulse velocity data can be used to evaluate and document the current condition of concrete railroad cross ties

Ties classification correlates with systems currently used by rail roads

Automated Sonic/ultrasonic data acquisition is fast

(1 sec/tie)

NDT CORPORATIONNDT CORPORATION

Page 25: NONDESTRUCTIVE CONDITION ASSESSMENT OF CONCRETE RAILROAD TIES Paul Fisk, NDT Corporation

QUESTIONS ????

NDT CORPORATIONNDT CORPORATION


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