Bonitz of Georgia is proud to be a member of
What is Engineered Fill?
Engineered fill, also called low density cellular concrete, cellular grout, and flowable fill, provides nearly unlimited geotechnical applications to suit project needs. The material is both lighter and stronger than traditionally compacted soil and flows easily into all spaces, eliminating potential voids. In addition, it is cost-competitive both during installation and throughout the life of the product.
When to Use It
Engineered fill is used to create a stable, load-bearing base when existing soil conditions are inadequate for construction.
Many sites contain weak, expansive, or inconsistent soils that cannot reliably support structures, pavements, or utilities. Engineered fill replaces or improves these conditions by providing material with predictable density, strength, and compaction characteristics.
When properly designed and placed, engineered fill limits settlement, reduces lateral and vertical movement, and improves long-term performance. This is critical under buildings, roadways, bridges, and infrastructure where uncontrolled soil behavior leads to cracking, deflection, or failure.
Engineered fill also helps manage erosion and long-term ground movement. Native soils may appear stable during construction but change over time due to moisture, loading, or disturbance. Engineered fill is selected and compacted to avoid those issues before they become problems in service.
Technical Specs
Density
Unit weight is adjusted to meet project-specific load limits and site conditions, allowing use where soil or conventional concrete would overstress subgrades or adjacent structures.
Compressive Strength
Strength is defined by application requirements and can be limited to allow future excavation where needed.
Flowability
Material is highly flowable and capable of filling confined spaces and voids while maintaining uniform placement over extended distances.
Lateral Force
Exerts lower lateral pressure than compacted soil, reducing risk when placed adjacent to walls, utilities, and existing structures.
Standards & Testing
Designed to meet project requirements and applicable standards, including ACI 523 and relevant ASTM test methods for density and strength.
Common Applications of Engineered Fill
Transportation & Civil Infrastructure
Used for roadway embankments, bridge approaches, and load-restricted fills where settlement control and reduced lateral pressure are required.
Structural & Commercial Site Work
Applied under slabs, plaza decks, and supported structures where weight limits and predictable performance matter.
Utility, Trench & Underground Applications
Common in pipe trenches, shafts, and utility corridors where compaction access is limited and future excavation may be required.
Void Fill & Remediation
Placed in abandoned structures, tunnels, mine voids, and tank removals where flow distance and complete void penetration are critical.
Environmental & Specialty Applications
Used for thermal encapsulation, erosion control, and specialty remediation where conventional fill creates long-term risk.
Pre-Spec Coordination for Engineered Fill
Engineered fill is most effective when it is considered during the design phase. Early coordination allows density targets, load limits, placement conditions, and performance requirements to be addressed before documents are finalized, reducing the need for substitutions or field revisions later in the project.
Our Engineered Fill Installation Process
1. Pre-Spec Coordination
Coordinate with engineers and project teams to evaluate applications, budgets, and specification requirements.
2. Mix Design & Technical Review
Develop project-specific engineered fill mixes aligned with geotechnical and design criteria.
3. Pricing & Submittals
Provide budget pricing and required technical submittals to support bidding and approvals.
4. Installation Plan & Placement
Plan site logistics and perform engineered fill placement in accordance with project requirements.
5. Documentation & Closeout
Deliver required documentation and closeout materials to support inspections and project completion.
Where We Work
Backed by generations of regional experience, our engineered fill installers serve construction projects throughout Southeast USA.
Contact Us
Fill out your information and one of our experts will reach out to you to discuss your project.
"*" indicates required fields
