New Technology in Concrete Testing - Indianaindianaconcretepavement.com/pdfdocuments/2009 Workshop... · New Technology in Concrete Testing ... January 28, 2009. New Testing Technology

Driving Indiana’s Economic Growth

New Technology in Concrete Testing

Tommy NantungOffice of Research and DevelopmentIndiana Department of Transportation

ACPA Indiana Annual Meeting, January 28, 2009

New Testing Technology

Pavement Thickness for QC or QAConcrete Materials Compatibility Test

Thickness Measurement

MIT Scan T2Magnetic Tomography TechnologyMeasure concrete and asphalt thickness during constructionUsing metal plate as thickness referencesNo time consuming calibrationEuropean Standard

MIT Scan-T2

Accuracy

Specified: 0.5% of the measured depth +1 mmTranslates to 0.1 in (less than 3 mm) for 13 in pavementField trials consistently produced less than 0.1 in measurement error

Laser Dip Stick

Impact Echo

Non-destructiveFlat concrete surfaceBased on impact echo technology, speed of sound waveVery easy to useData acquisition and software included

Impact Echo Thickness Gauge

New Impact Echo

Multiple Impact Surface WaveImpact EchoImpact Echo ScannerAdd-on other NDT testing

New Impact Echo

Use surface wave to calibrate wave speedNo concrete block for calibrationIntegration with other NDT testingBetter data acquisition

Air Void Analyzer

Measure air entrained in fresh concreteDoes not measure entrapped airFew State DOTs use as standard testingFairly accurate in determining air content

Air Void Analyzer

Coffee Cup Hydration Testing

Monitor heat of hydration of cementDetermine compatibility of concrete materialsEarly screening for mix design approval

Foam Drainage Test

Evaluate stability of air void systemGood screening tool for mix design approval processAvoid lack of air entrainment in hardened concrete