Tire-Derived Aggregate (TDA)

What is the difference between Type A and Type B TDA?

Type A TDA consists of larger shreds (75–300mm) typically used in retaining wall backfill, large road embankments, slope stabilization, frost insulation, and vibration dampening. Type B TDA consists of smaller chips (12–75mm) used in drainage blankets, French drains, landfill leachate collection systems, gas collection layers, and stormwater management. We can supply either type depending on your project specification.

Can TDA be used in septic system drain fields?

Yes. TDA is used as a lightweight, free-draining aggregate replacement for crushed stone in septic system drain fields and leach field trenches. Its high hydraulic conductivity allows effluent to percolate efficiently through the absorption field. TDA is significantly lighter than gravel, reducing soil compaction and making installation easier. We sell TDA at $65/ton with walking floor delivery at $2.75/mile from our Hartwell, GA plant (123 Industrial Park Road, Hartwell, GA 30643). Septic system contractors in South Carolina are a key target customer. Check with your local health department or septic engineer for approval in your jurisdiction.

How is TDA delivered?

All TDA is delivered by walking floor trailer from our Hartwell, GA facility at $2.75 per mile. Walking floor trailers allow efficient, controlled unloading directly at your job site. Buyers arrange and pay for all transportation costs. Contact us to discuss delivery logistics and scheduling for your project.

What is the difference between TDA shreds and TDA chips?

TDA shreds are larger pieces (75–300mm) typically used in retaining wall backfill and large fill applications. TDA chips are smaller (12–75mm) and are used in drainage layers, leachate collection, and applications requiring tighter gradation. We can supply either depending on your project spec.

Does TDA meet ASTM standards?

Yes. Our TDA is produced to meet ASTM D6270 — the Standard Practice for Use of Scrap Tires in Civil Engineering Applications. We can provide documentation and material specs with each load.

Is TDA approved for use in South Carolina and Georgia?

Yes. TDA is an accepted civil engineering material in both SC and GA. Projects using TDA should follow applicable state DOT specifications and ASTM D6270 guidelines. Contact us for state-specific documentation.

How does TDA compare to conventional aggregate in terms of weight?

TDA weighs approximately one-third as much as gravel — roughly 25–35 lbs/ft³ compared to 100–130 lbs/ft³ for soil or gravel. This dramatic weight reduction is the primary reason engineers specify TDA for retaining wall backfill, bridge abutments, and embankments over weak soils.

Can TDA filter contaminants from stormwater runoff?

Yes. Research has shown that TDA can help filter heavy metals and oils from roadway runoff, making it a dual-purpose material in stormwater management applications — providing both drainage and passive filtration.

What are the minimum order quantities?

We supply TDA in bulk truckload quantities (typically 20–25 tons per load). For large projects requiring multiple loads, we can arrange scheduled delivery. Contact us for project-specific pricing.

Can TDA be used as landfill daily cover?

Some states permit TDA as alternative daily cover (ADC). Approval is site-specific and requires state environmental agency approval. Contact us and we can assist with documentation for your facility.

How is TDA priced?

TDA is $65 per ton. Delivery is available by walking floor trailer at $2.75 per mile from our Hartwell, GA plant (123 Industrial Park Road, Hartwell, GA 30643). Contact us for a project quote — we offer competitive pricing for contractors, engineers, and municipalities.