LL-TEQ™ · Products · LL30-D
LL30-D — Native Soil Stabilization
The LL30 application design that turns on-site soil into a load-bearing base — no excavation, no imported granular.
Proven LL30 chemistry — same product, dedicated application designThe problem
Dig, haul, backfill: the most expensive base is the one you import
Soils written off as "unusable"
Silts, sands, sandy clays: conventional practice excavates and replaces them, as if the site's own material had no value.
The cost of granular
Every imported tonne is paid for three times: at the quarry, in trucking, in placement. Far from urban centres, hauling becomes the budget's biggest line.
Kilometres left waiting
On a fixed budget, cost per kilometre decides how many kilometres get done. Cutting imported structure means treating more network every season.
The application design
The soil in place becomes the structural layer
LL30 is mixed into the native soil with a reclaimer, at a moisture content brought just under the Proctor optimum for maximum compaction. The copolymer binds the particles through the full treated depth: the soil becomes a monolithic load-bearing layer.
- Integration depth: 100–150 mm
- Documented dosage: 1–4 % by material and load requirement
- Compaction: ≥ 95 % Standard Proctor (AASHTO T-99 / ASTM D698)
- Substrate preconditions: no organics, Dmax ≤ 80 mm (Application Guide)
- Procedure and QC: SOP LL30 (Solecovia, Oct 2025)
The evidence
From native soil to engineering numbers
1,625 PSI on sand-clay
LL30 at 4 % in sand-clay: 1,625 PSI compressive strength (ASTM C39/C42, S.A.M Consultants, 2016). Documented corrected range across substrates: 1,310–3,705 PSI — 16 specimens, 2 labs, 2016–2023.
A structural coefficient for your design math
The LL30 stabilized base carries a recommended AASHTO 1993 layer coefficient of a₂ = 0.21–0.30, derived within published DOT ranges and usable in CHAUSSÉE 2 (LL-TM-2026-002).
Certified under aircraft loads
LL30-stabilized soils have earned military pass-rating certifications under PCASE 2.09 for C-17 and C-130 aircraft (Mocoron, ALZ Sandhill — LL-TM-2026-001). A municipal street demands a fraction of those loads.
Typical jobs
Where LL30-D goes to work
- Rural and forestry roads built from the soil in place
- Pads, industrial yards and staging areas on native soil
- Subgrade improvement and road base ahead of an LL25 seal
Soil that needs to carry load?
Describe your project — area, soil, timeline — and we'll come back with a costed approach.