Flowable Fill: What You Need to Know


Flowable fill has been a staple in the concrete industry for more than 20 years, serving as a solution to poorly compacted soil or granular fill. This product is placed as a flowable liquid, but it hardens rapidly to provide load-bearing properties with no necessary compaction. Thanks to recent laws passed by the Environmental Protection Agency, the use of flowable fill has increased in void-filling applications like underground structures, mines and tunnels, etc.

The History of Flowable Fill

Flowable fill was originally comprised of large amounts of water and fly ash. Due to volume changes, the product was thoroughly researched and changes were made, and flowable fill is now often used in utility trenches, retaining wall backfill, and other similar applications.

Flowable Fill Today

Today, flowable fill is comprised of a combination of water, cement, fly ash/slag, and fine aggregate. Special admixtures can also be used to help increase strength or deliver additional benefits needed for your specific project.

Thanks to its liquid properties, flowable fill can travel long distances, making this the perfect material to use in underground projects. It’s also economical, providing savings in equipment, time, and overall labor. Finally, it’s design versatility makes it a great choice for many contractors, architects, and engineers.

Ozinga supplies flowable fill for a variety of projects throughout the Midwest and beyond. Talk with one of our concrete experts to see how flowable fill can benefit your upcoming project.

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