This easy-to-handle mixture of cement, fly ash and water will not settle and can provide strengths ranging from 50 to 150 PSI without the need to dump, lift, spread or tamp. This backfill is commonly used for sewer and utility trenches, building excavations and retaining walls, flowable backfill has also been used as structural fill for footings, foundations, and pipe bedding. Environmental remediation jobs, such as abandoned underground storage tanks, sewers, and manholes, often utilitze this material. Flowable backfill is a faster, less expensive way to solve a variety of backfill needs.