Lightweight Flowable Fill (Cellular Concrete)

Cellular Concrete is a lightweight fill material primarily used in geotechnical applications. Cellular Concrete is made by the injection or blending of pre-formed stable foam into cement-based slurry. By adding the foam, the weight of the concrete can be reduced to as low as 20 pounds per cubic foot when it’s wet. Cellular Concrete can be produced as non-pervious or pervious.

Lightweight Flowable Fill (Cellular Concrete)

Lightweight Flowable Fill


Low Density Cellular Concrete (LDCC) is a lightweight fill material primarily used in geotechnical applications. LDCC is made by the injection or blending of pre-formed stable foam into cement-based slurry. Wet cast densities range from 20pcf to 120pcf reaching strengths of 20 psi to 3,000 psi.

MCSI can produce a lightweight cellular concrete with very low permeability, test results have shown water absorption levels around 3%-7%. These characteristics, and the FM approvals and UL listings make this an ideal product for building materials, including precast blocks, wall panels and other lightweight precast structures, roofing and flooring applications.

The material does not require pre-loading for settlement mitigation, and provides a 2 to 1 point-load distribution edge. The fluid material can completely fill spaces and exhibits shrinkage of less than 0.3%.

Previous Low Density Cellular Concrete (PLDCC) through the use of open-cell foam technology, which allows water to pass through the capillary-like bubble structure. PLDCC provides proven geotechnical solutions for applications requiring drainage capacities exceeding those obtainable from compacted soil or controlled low strength material (CLSM). PLDCC cement slurry mixes can range from 50 to 200 psi, with wet cast densities from 20 to 40pcf.

MCSI has placed cellular concrete as backfill on numerous projects due to the high cost of typical backfill methods due to insufficient space around structures for typical equipment access, winter conditions, speed of 100% compaction placement, irregular or voided areas, and to reduce loads. LDCC or PLDCC flowable backfill may be pumped almost anywhere.

The ability to precisely control density, slump and strength, position low density cellular concrete is an ideal alternative to traditional fill methods and materials in many construction and mining applications.

Features and Benefits:

  • Light weight.
  • Insulating: excellent freeze- thaw resistance.
  • High slump virtually self leveling.
  • Rapid installation can be placed by pump.
  • Long lasting and stable. Load reducing engineered fill, replacement for unstable soils.
  • Absorbs shock waves.
  • Broad range of densities and compressive strengths.
  • Green- Uses considerably less truck loads than traditional backfill material
  • Absorbs shock waves
  • Broad spectrum of densities and compressive strengths
  • Low water absorption and low permeability
  • Reduces hydrostatic pressure on retaining walls


     Pervious Applications:

  • Sports Fields & Golf Courses
  • Self-Leveling fill
  • Drainage Structures
  • Scour Protection
  • Tunnel Backfill
  • Underground Tanks and Pipelines
  • Soil Stabilization
  • Permeable Roadbase
  • Foundation Drains
  • Gabion Retaining Systems
  • Annular Backfill
  • Load-Reducing Engineered Fill
  • Water Retention
  • Pipeline Beds
  • Greenhouse Floors
  • Fill for Abandoned Mines
  • Impact Absorption
  • Bridge Approach & Landslip Repair

Annular Space Grouting

Annular Space Grouting is process of filling the space between a host pipe or box culvert and a new liner pipe or conduit that has been pre-installed, better known as “slip lining”. Many state and federal transportation projects have been done utilizing this trenchless method with time and cost savings.

Low Density Cellular Concrete (LDCC) is an ideal material for annular space grouting. MCSI has successfully performed annular space grouting on over 100 culvert rehabilitation projects, as well as water and utility pipeline projects.

Foundation Backfills

Underground Tank & Utility Abandonment

Concrete Repair, Restoration & Stabilization Specialists

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