Ultrasonic Tomography - SiGeo Concrete
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Ultrasonic Tomography   

Ultrasonic pulse velocity and tomographic imaging technology is increasingly taking centre-stage as a very reliable non-destructive testing method in Concrete industry including quality verification of both in-situ cast and pre-cast concrete structural components (bridges, columns, engineered panels, ring-beams, foundation footings, stitches)

All our testing methodology, data processing and reporting conforms to: ASTM D5882-16, AS/NZS: 2159-2009 and AS/NZS: 2425:2015 industry standards legally recognised within Australia and internationally.

Multi-dimensional imaging options including: [2D/3D], [B-scan, C-Scan, D-Scan can be produced to maximise anomaly illumination and resolution. Results are presented relevant to objectives and finely interpreted for further engineering durability assessment or remediation planning.

Benefits

Structural Auditing QA/QC

  • Quality evaluation for on-going construction projects or prior to purchasing)
  • Defect assessment (Cracks, Honey-combing, voiding, porosity, delamination in concrete)
  • Homogeneity of material
  • Litigation and dispute settlement (quality, uniformity, defect)
  • Forensic investigation (post-damage evaluation)
  • Strength or modulus of material

Method

Depending on the specification, we conduct data acquisition and data processing in accordance to EN12504-4 (Europe), ASTM C 597-02 (North America), BS 1881 Part 203 (UK), standard procedures, for evaluating Ultrasonic Pulse Velocity tomography testing on concrete structures through B-scans, C-scans for further engineering analysis.

Data Processing

Line Scan

Pulse velocity Analysis

Image processing

Compressive Strength (UPV Correlation)

Filtering & Deconvolution

Defect Assessment

Grading “Quality of Concrete”

 

 

Based on UPV velocity and range interpretations, concrete quality and uniformity can be graded as below:

 

 

  • Velocity >4.5 Km/sec (Good quality)
  • 4.5 Km/sec<Velocity >2.5Km/sec (Medium quality)
  • Velocity < 2.5 Km/sec (Doubtable quality)

Uniformity Quality 

 

 

Using the range (as difference between maximum and minimum), uniformity of quality can be classified as below:

 

 

  • Velocity range <0.5 Km/sec (Uniform quality)
  • Velocity range >0.5 Km/sec (Doubtable quality