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IHE Branch Event

Online: Real Time Modulus mapping of Pavement Foundation Layers

  • CPD Value: This event is awarded 1 CPD Hour
Dates Location Cost (ex VAT)
Wed 18 Jan 2023 Online via Teams FREE

Full Details


UK – 15:00hrs – 16:00hrs
Doha -18:00hrs – 19:00hrs

(Please note that this event is a repeat of a previous event were some technical issues occurred)

The IHE Middle East Branch would like to invite you to their next technical webinar on Wednesday 18th January 2023.


Assessment of pavement foundation layer in situ using mechanistic parameters such as stress-dependent resilient modulus can provide a validation of the input parameters assumed during pavement design. Globally, there is growing interest in mechanistic based construction testing and field verification of design assumptions. Many testing methods used today used for this purpose, are indirect measurements with empirical relationships to design assumed values. Key factors such as stress-dependency, inconsistencies in measurement influence depths between field testing and what is assumed in design, need for proper seating loads, and loading rate are often ignored with the indirect measurements. Empirical relationships are often associated with significant uncertainty with future predictions. In this presentation, real-time modulus mapping using COMP-Score RT® that is calibrated using in situ direct measurement of modulus values (i.e., resilient modulus, modulus of subgrade reaction) using Automated Plate Load Testing (APLT) is discussed. To date, over 68 million square feet of area has been mapped on projects across the U.S., on roadway and landfill embankment construction projects. The modulus mapping results revealed that pavement foundation materials can be highly non-uniform with built in low stiffness “soft” areas that are not addressed using traditional spot test measurements. The current state of the practice with implementation of this technology in the U.S. and lessons learned will be discussed in this presentation.


Dr. Pavana Vennapusa is the Engineering Services Manager and one of the founding partners at Ingios Geotechnics, Inc. He received his Bachelor’s degree in Civil Engineering from Osmania University in India, and Masters and Doctorate degrees from Iowa State University. He has authored over 60 peer-reviewed publications and completed several research and consulting projects covering topics of pavement foundations, earthwork construction, soil stabilization, in-ground instrumentation, evaluation and development of in situ technologies and machine-integrated monitoring systems including intelligent compaction.

Prior to joining Ingios, Dr. Vennapusa was a Research Faculty and served as the Assistant Director at the Center for Earthworks Engineering Research at Iowa State University. In that role, Dr. Vennapusa served as a principal or co-principal investigator for research grants from FHWA, TRB, DOTs, and many industry sponsors.

Dr. Vennapusa is a registered professional engineer in seven states in the U.S.

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