Demonstration Applications in the Use of Flowable Backfills for Bridge Abutments

摘要

Flowable backfills are cementitious materials placed in a fluid condition that cure to hard, relatively incompressible backfills. They typically consist of cement, fly ash and water with possible additions of coarse aggregate and/or admixtures. Flowable backfills were used to backfill abutments and a retaining wall at the Mahoning Creek and Panther Creek bridge demonstration projects in western and central Pennsylvania. The abutments were instrumented with pressure cells to measure vertical and lateral backfill pressures and with piezometers to monitor ground water levels.