Why Choose Engineered Flowable Fill for Your Next Engineered Fill Project or Structural Fill Project?

Why Choose Engineered Flowable Fill for Your Next Engineered Fill Project or Structural Fill Project?

There are many options when determining the type of material to use for engineered fill on your project.  For many applications, flowable fill is your best choice for an engineered fill.

What is Structural Fill vs. Engineered Fill?

Engineered fill and structural fill are often used interchangeably.  Structural fill most commonly refers to earthen materials that are compacted to create a strong and stable base. This is the most basic type of fill.  At Nettles, we define engineered fill as any fill that is designed and placed according to a precise engineered specification. This ensures the fill material performs as required. 

What is Engineered Flowable Fill?

Engineered Flowable Fill, sometimes referred to as “flowable fill” is an engineered fill material that is placed wet and “flows” into place.  In many cases, on-site mixing and pumping equipment is used making this process much less disruptive than traditional engineered fill which hauled in and placed with heavy earth moving equipment. 

What is Low-Density Cellular Concrete (LDCC)?

At Nettles Construction, we use Low-Density Cellular Concrete (LDCC) for our engineered fill applications. LDCC is a mixture of Portland Cement, water and preformed foam that can be formulated to achieve specific densities and strengths. This makes LDCC ideal for many geotechnical applications. Learn more about Nettles Constructions’ Low-Density Cellular Concrete (LDCC) here, or check out our recent blog post.

What are the Advantages of Low Density Cellular Concrete (LDCC) Engineered Flowable Fill over Traditional Engineered Fill?

LDCC engineered flowable fill has several advantages over traditional engineered fill. Some of the advantages included:

  • Can Pump Into Place, Keeping Heavy Equipment Away From Placement : Traditional engineered fill requires heavy earth moving equipment to move fill into place and compact the fill. With LDCC engineered flowable fill, the fill can be pumped into place from over 1,000 feet away.


  • Lighter and Stronger Than Traditional Flowable Fill – Reduced Dead Loads: LDCC engineered flowable fill is much lighter and stronger than traditional compacted engineered fill. Because of the high strength/low density of LDCC, dead loads on structures are significantly reduced. Many times this eliminates the expense of strengthening of existing structures that would be required with traditional engineered fill.


  • Hardens to Create a Permanent Solution: Traditional engineered fill stays in place due to compaction. LDCC is pumped into place and then hardens like traditional concrete. This creates a permanent solution.


  • Does Not Require Compacting: Because LDCC engineered fill does not require compaction, it is a great solution for pipeline fills, annular fills, void fills and mine fills.


  • Reduced Lateral Loads: Once set, LDCC engineered fill does not exert lateral pressure against retaining walls and other structures. As a result, there can be significant savings in the repair of existing structures and the engineering and construction of new structures.

At Nettles Construction, we are experts in the application of LDCC engineered fill. We work across Texas, Oklahoma, Arkansas, and Louisiana. Contact us to discuss your next engineered fill project.