Extending the Service-Life of Bridges Using Sustainable and Resilient Abutment Systems: An Experimental Approach to the Electrochemical Characterization of Lightweight Mechanically Stabilized Earth [Research Brief]

Abstract

This research addresses the need to extend the service life, reduce the life cycle cost, and improve the safety and reliability of bridge abutments, part of the nation\u2019s critical transportation infrastructure. Mechanically stabilized earth (MSE) abutments contribute to the constructability and economy of bridge infrastructure. The electrochemical properties of backfill materials influence the corrosion of embedded steel strips in MSE systems. The application of rotary kiln manufactured lightweight aggregates contributes to the sustainability of bridge abutments by addressing corrosion concerns, reducing structural loads and settlements, providing free drainage, and accelerating construction. This project investigates the properties and characteristics of expanded shale, clay, and slate aggregates compared with normal-weight aggregates concerning the corrosivity of steel reinforcement