CONTROLLED DENSITY FILL
CONTROLLED DENSITY FILL (CDF): THE SMART SOLUTION FOR BACKFILL & VOID FILL
Controlled Density Fill (CDF) is a self-compacting, low-strength concrete mix designed for backfill, trench fills, and void fills. Unlike traditional soil or gravel, CDF flows easily into place, eliminating the need for mechanical compaction and reducing labor costs.

Ideal for utility trenches, pipe bedding, and foundation backfill, CDF provides uniform support and prevents settlement over time. Its controlled strength allows for easy excavation when needed, making it a reliable and efficient alternative to compacted soil or granular materials.
CONCRETE POURED
15,176+
2,500
CONCRETE DELIVERIES
YEARS IN BUSINESS
11
WHAT IS CONTROLLED DENSITY FILL (CDF)?
Controlled Density Fill (CDF), also known as flowable fill, is a self-leveling, low-strength concrete mix used as a substitute for compacted soil, gravel, or granular backfill. Unlike traditional backfill materials, CDF flows into place, eliminating air pockets and the need for mechanical compaction. It is commonly used in utility trenches, pipe bedding, foundation backfill, and void fills, providing stable support that prevents settlement over time.
KEY BENEFITS OF USING CONTROLLED DENSITY FILL
- Self-Compacting – Flows easily into place, requiring no manual compaction.
- Eliminates Settlement – Provides uniform, non-shrink support to prevent shifting or voids.
- Fast & Efficient – Reduces labor and equipment costs by eliminating the need for layering and tamping.
- Easy to Remove – Designed with controlled strength, allowing for future excavation when necessary.
- Improved Safety – Reduces the risk of soil instability and trench collapses.
COMMON APPLICATIONS OF CONTROLLED DENSITY FILL (CDF)
CDF is widely used in residential, commercial, and municipal projects for its workability and long-term stability. Some of its most common applications include:
UTILITY TRENCHES & PIPE BEDDING
- Ideal for water, sewer, and gas line installations
- Flows around pipes for uniform, void-free support
- Reduces trench settlement and pipe movement over time
FOUNDATION BACKFILL
- Used behind retaining walls and building foundations
- Prevents soil erosion and settlement
- Provides long-lasting structural support
VOID FILL & STRUCTURAL SUPPORT
- Fills abandoned tunnels, basements, and sinkholes
- Stabilizes unstable soil under roads and structures
- Prevents erosion and water infiltration
HOW MUDD MONKEY MOBILE MIX DELIVERS CDF
At Mudd Monkey Mobile Mix, we mix Controlled Density Fill (CDF) fresh on-site using volumetric concrete mixers, ensuring the perfect consistency for each project. Unlike pre-mixed solutions that may set before use, our on-demand mixing guarantees precise control over flowability, strength, and setting time.
We deliver high-quality CDF to Vancouver, WA, Ridgefield, Battle Ground, Camas, Washougal, La Center, Woodland, and surrounding areas. Whether you need small trench backfill or large-scale void fill, our mobile mix trucks ensure you get exactly what you need—no waste, no delays.
NEED CONTROLLED DENSITY FILL FOR YOUR PROJECT? CONTACT US TODAY!
Looking for a fast, reliable, and cost-effective backfill solution? Mudd Monkey Mobile Mix provides high-quality Controlled Density Fill (CDF) on demand, ensuring stability, efficiency, and long-term performance.
