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Produce a Fluid Backfill Which Flows Easily and is Self Leveling

Controlled low strength material (CLSM)

This material provides a fluid backfill which flows easily and is self-leveling.

While it costs more than a dry granular material, it does not need to be placed in lifts, spread, and compacted after each lift.

It is a fluid mixture made of portland cement, water, fine aggregate and/or fly ash and can include an admixture to improve flowability, lower densities, eliminate segregation and settlement, and control strength development in applications where future excavation is required.

Typical 28-day compressive strengths are 50 to 200 psi and densities range from 115 to 145 pcf.

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