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The Conco Companies

Commercial Concrete Contractors Since 1959

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You are here: Home / Annular Grout and Void Space Backfill

Annular Grout and Void Space Backfill

At The Conco Companies, we reduce costs and installation time by utilizing our proprietary foam concrete ConFoam™ for multiple applications, including annular grout and void space backfill. ConFoam™ is a cement-based slurry with a foaming agent that is highly flowable and doesn’t settle. It’s often referred to as “liquid backfill,” because it flows smoothly and completely fills voids.

A Customizable Solution

Conco adjusts the density of ConFoam™ for each application for optimal results. When used for annual grout backfill, ConFoam™ is produced at a lighter density to prevent the carrier pipe from floating. When produced as a void space backfill, the density is customized for compatibility with surrounding structures and soil conditions.

ConFoam™ also has low viscosity, which allows it to be pumped across thousands of feet to locations that otherwise couldn’t be reached by traditional backfill. Traditional backfill might require an expansion of the excavation site just to make room for equipment and workers, while ConFoam™ requires less accommodation. Workers also don’t need to be in excavation sites to install ConFoam™. They can simply use hundreds of feet of hose to pump ConFoam™ into out of reach voids that’d otherwise be problematic for traditional backfill.

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Fast and Effective Emergency Relief

Conco produces our proprietary ConFoam™ to be quickly mobilized for emergency repairs. It requires less equipment and labor than traditional concrete, making it an ideal choice for timely responses. Workers can begin filling voids within an hour of arrival. ConFoam™ also reaches 100% consolidation sooner than traditional concrete due to its self-leveling and self-compacting characteristics. Unlike traditional backfill, ConFoam™ doesn’t settle, shrink, or have unexpected strength gain.

Superior Alternative to Other Backfill Methods

ConFoam™ doesn’t have the drawbacks of other backfill methods. Backfilling with layers of aggregate base material requires intensive labor, difficult compaction, and leaves you with backfill that has a tendency to settle and be washed away. Another backfill material, which is concrete-based and called controlled density fill (CDF), doesn’t flow as well as ConFoam™, and can be difficult to excavate because it gains strength over time.

There are many other benefits to using ConFoam™ as annular grout and void space backfill, not limited to:

  • Proven Expertise – Conco teams are experienced at producing and placing ConFoam™.
  • Self-Compaction – ConFoam™ doesn’t use mechanical compaction or compaction testing.
  • Cost-Effective – ConFoam™ reduces costs associated with transportation, equipment, and labor, when compared to traditional backfill.
  • No Waste – ConFoam™ is produced on-site as it is needed. Production stops once the project is filled, reducing the carbon footprint.

Conco’s goal is to bring our decades of expertise and professionalism to each project. We continue to improve our facilities to better serve the growing market for commercial, industrial, and public projects in the Western U.S. Contact The Conco Companies for information on how you can save time and money with ConFoam™ annular grout and void space backfill.

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Free Whitepaper: Hiring the Best Commercial SubContractor

N. California

5141 Commercial Circle
Concord, CA 94520

925-685-6799 Phone
925-685-6851 Fax

S. California

13052 Dahlia Street
Fontana, CA 92337

909-350-0474 Phone
909-350-0475 Fax

Washington

18644 72nd Avenue S
Kent, WA 98032

425-251-1684 Phone
425-251-6548 Fax

Portland

7025 N Leadbetter Road
Portland, OR 97203

(971) 808-5954 Phone

Copyright © 2021 · Conco. All Rights Reserved.

Conco’s mission is to be the best supplier of concrete services in the Western United States and to bring expertise and unsurpassed quality to each project. We continue to upgrade and expand facilities to better serve the growing market for public works projects, commercial, parking structures, educational, and other construction development. We welcome the opportunity to offer our vast experience to your next project as one of the country’s leading commercial concrete contractors.

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  • Home
  • About
    • Leadership
    • Careers
      • Assistant Project Manager – Kent, Washington
      • BIM Technician – Kent, Washington
      • Business Development Manager
      • Concrete Boom Pump Operator, Reno, NV
      • Construction Project Engineer – Portland, OR
      • Formwork Design Engineer – Kent Washington
      • Project Manager Southern CA
      • Reinforcing Steel Detailer – Seattle
      • Safety Director
      • Senior Project Engineer – Fontana, CA
      • Senior System Administrator \ Asp.net Developer
      • Superintendents for Northern or Southern CA locations
    • Internships
    • Safety
    • Site Map
      • Privacy Policy
  • Services
    • Concrete Reinforcement
      • Rebar Fabrication
        • Rebar Manufacturers
        • Rebar Companies
      • Post Tension Cable
      • Steel Rebar
        • Steel Rebar Suppliers
      • Reinforced Concrete Walls
      • Reinforcing Steel
      • Stud Rail
    • Concrete Design/Build
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    • Concrete Formwork
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      • Cellular Concrete Contractors
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