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Pavements 2025

Case Studies on Paving Projects

POSTER RECEPTION (View list of posters here)

The Application of the Falling Weight Deflectometer for Quality Control of Cement-Treated Layers

Tuesday, June 10, 2025

4:45 PM – 6:00 PM MT

Primary Author(s)

MK

Martynas Karbočius, MS

Junior Research Fellow
Vilnius Gediminas Technical University
Vilnius, Vilniaus Apskritis, Lithuania

Presenter(s)

MK

Martynas Karbočius, MS

Junior Research Fellow
Vilnius Gediminas Technical University
Vilnius, Vilniaus Apskritis, Lithuania

Co-Author(s)

AV

Audrius Vaitkus, n/a

Professor
Vilnius Gediminas Technical University
Vilnius, Vilniaus Apskritis, Lithuania
J�

Judita Škulteckė, n/a

Senior researcher
Vilnius Gediminas Technical University
Vilnius, Vilniaus Apskritis, Lithuania
O�

Ovidijus Šernas, n/a

Senior researcher
Vilnius Gediminas Technical University
Vilnius, Vilniaus Apskritis, Lithuania

Submitter(s)

MK

Martynas Karbočius, MS

Junior Research Fellow
Vilnius Gediminas Technical University
Vilnius, Vilniaus Apskritis, Lithuania

Abstract: Traditionally, the in situ bearing capacity of cement-treated layers for quality control is assessed using static load tests. Although reliable, the method is time consuming and provides limited data on the bearing capacity of the entire facility and possible localized structural weaknesses, likely due to variation in the properties of cement-treated in situ soils or aggregates. On the contrary, the falling weight deflectometer (FWD) offers a faster and more comprehensive method, enabling the acquisition of measurements as densely as practical according to the purpose of the structure and the specifics of hydrological, geological, and other environmental conditions. It improves the detection of possible weak spots in the structure, allowing timely corrective actions prior to pavement installation. By comparing the bearing capacity results obtained from the FWD with those of traditional static load tests, the study aims to determine whether the FWD can serve as a reliable alternative for assessing the bearing capacity of cement-treated layers. The article includes case studies of several different objects that perform load capacity measurements using the static load method and the falling weight deflectometer. Analysis of the correlation indicated a linear relationship between the static modulus established by the static load test and the dynamic modulus obtained through the FWD, showing the potential to apply the method in road construction for quality control of cement treated layers.

Learning Objectives:

Attendees can expect to learn the following from this session:

Upon completion, participants will be able to identify limitations of static load tests, especially typical of cement-treated layers.
Upon completion, participants will be able to define the principles of quality control tests of the cement-treated layer with a falling weight deflectometer.
Upon completion, participants will be able to define relationship between static load test results and dynamic load test resulta with falling weight deflectometer.