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Recommended Compaction Requirements for Placement of Uniform Fine Sand Backfill Materials

Objective and Scope of Project The objective of this project was to develop recommendations for compaction of cohesionless soils used as backfill materials. The Texas Department of Transportation (TxDOT) utilizes a number of sources of cohesionless soils as fill materials for embankment construction and as backfill for mechanically stabilized earth (MSE) walls. Some problems have been experienced with these materials in the past, especially with settlements of backfills behind retaining walls. TxDOT sought a suitable procedure for placement of these materials that would ensure satisfactory performance.