Project Title
Implementing the LWD for MoDOT Construction Acceptance of Unbound Material Layers: Phase II
Researcher(s)
Xiong Zhang, PhD, PE – PI
Jenny Liu, PhD, PE – Co-PI
Project Description
Modulus-based quality assurance (QA) methods with Light-Weight Deflectometer (LWD) can easily measure the critical engineering properties of compacted soil in the field. The Phase I project has concluded that the LWD is a promising tool for construction acceptance evaluation of unbound material layers such as well graded sands and clay soils. However, limited number sites were tested since LWD could not be used on clay soil sites with much higher moisture content than optimum. In this Phase II project, more types of soils from different sites to develop representative testing specifications. The project will develop testing specification for field compaction QA using LWD. The existing testing procedure will also be simplified to improve the testing efficiency and will be ready to implement. In addition, the highway agency will obtain important data of resilient behavior of typical Missouri unbound materials from lab LWD on mold, lab triaxial test, and field LWD and significant influencing factors for future design, construction, and management.
Project Visuals
Xiong Zhang, PhD, PE – PI
Jenny Liu, PhD, PE – Co-PI