Virgin Baserock (AB Class 2)
Best for: Structural base where you need clean, certified virgin aggregate to spec.
Gradation
¾" maximum, graded to fines
Specification
Caltrans §26 Class 2 AB
R-value
≥ 78
Sand equivalent
≥ 22
Overview
About Virgin Baserock (AB Class 2)
Virgin baserock is the structural backbone of paved construction — a quarry-fresh Class 2 aggregate base crushed from solid stone and graded continuously from three-quarter inch down to fines. Because every particle is freshly fractured and angular, the blend keys together and compacts into a dense, rigid platform that distributes traffic loads down to the subgrade without rutting, pumping or settling. It is the same material specified beneath California highways, parking structures and building pads — certified to a minimum R-value of 78 and a sand equivalent of 22 under Caltrans Standard Specifications Section 26. When your project demands a clean, certified, load-bearing foundation engineered to perform for decades, this is the base to build on.
- ✓Quarried Caltrans Class 2 aggregate base.
- ✓Graded ¾" down to fines — keys together and locks tight.
- ✓R-value ≥ 78, sand equivalent ≥ 22.
- ✓The structural foundation under roads, pads and driveways.
Virgin baserock is the workhorse foundation of California construction. Because it is crushed straight from quarried stone, every particle is angular — the sharp faces mechanically lock against one another so the layer behaves like a single rigid slab once compacted. The "dense-graded" recipe (a controlled blend of coarse stone, intermediate sizes and a measured amount of fines) is what fills the voids and lets the material compact to a tight, water-shedding platform that spreads vehicle loads down to the subgrade.
Our base meets Caltrans Section 26 Class 2 — a minimum resistance value (R-value) of 78 and a sand equivalent of at least 22, the same material specified under state highways, parking lots and building pads. Place it in lifts of 4–6", moisten to near-optimum, and compact to 95% relative compaction for a finished surface that will not pump, rut or settle. One ton covers roughly 100 sq ft at 2" or about 65 sq ft at a 3" compacted depth.
Specifications
The details
- Gradation
- ¾" maximum, graded to fines
- Specification
- Caltrans §26 Class 2 AB
- R-value
- ≥ 78
- Sand equivalent
- ≥ 22
- Compacted unit weight
- ≈ 1.4 tons / cu yd
- Coverage
- ≈ 100 sq ft @ 2" per ton
- Sold by
- Ton
Applications
Common uses
- ✓ Road & street structural base
- ✓ Building slabs & equipment pads
- ✓ Parking lots & driveways
- ✓ Base under pavers, concrete & asphalt
- ✓ Sub-base over soft subgrade
- ✓ Caltrans / municipal spec work
Need Virgin Baserock (AB Class 2) on site?
Priority delivery across French Camp & San Joaquin County.
Questions
Virgin Baserock (AB Class 2) — FAQ
- How deep should I install base rock?
- For a residential driveway, 4" of compacted base is typical; heavy traffic or soft soils call for 6" or more. Build it up in lifts and compact each one.
- What is "Class 2" base rock?
- Class 2 is a Caltrans grading category for aggregate base — it sets the gradation, minimum R-value (78) and sand equivalent. It is the standard structural base used under most California paving.
- Do I need to wet it before compacting?
- Yes. Base compacts best at near-optimum moisture. A light, even watering before rolling lets the fines bind and the stone lock together.
More materials
Explore the rest of the yard
QuarryWash Baserock
Wash baserock delivers the structural performance of Class 2 aggregate base with a cleaner, free-draining character. It is the same crushed base material run through a wash plant to flush out excess silt and clay fines — the result is a low-dust product on the jobsite and a more permeable platform that lets water move through rather than perch on top. It still keys together and compacts under pavement and pads, but it is the smarter specification wherever drainage, cleanliness and a tidy backfill matter as much as raw stiffness. Crews choose it under permeable pavers, behind retaining walls and as pipe and utility base where washed material is preferred or required.
RecycledRecycled Base (Class II)
Recycled base is reclaimed concrete and asphalt, crushed and screened back into a graded three-quarter-inch aggregate that meets Caltrans Class II strength — engineered performance at a materially lower cost. The crushing process leaves the same angular, interlocking particle shape as virgin rock, so it compacts into a hard, stable platform that carries load just like quarried base, with a mild self-cementing tendency that can stiffen it further over time. For the vast majority of driveway, lot and pad work it performs on par with new base while diverting demolition debris from the landfill — a genuine sustainability advantage that can also support green-building credits. Produced on site at our French Camp yard, supply stays steady, local and competitively priced.
RecycledGrinding Asphalt (RAP Millings)
Grinding asphalt — reclaimed asphalt pavement, or RAP — is existing roadway milled off and crushed back into a workable, one-hundred-percent recycled aggregate. What sets it apart is the residual asphalt cement still coating every particle: under summer heat and traffic those oils reactivate and the material knits back together, a solar self-healing effect that firms a loose spread into a hard, blacktop-like surface with no new binder and no paving crew. Laid in three-to-six-inch lifts and compacted, it forms a durable, low-maintenance, weed-resistant surface that sheds water and improves with use. It is the budget-smart choice for driveways, ranch and rural roads, parking areas and shoulders — the greenest and most economical hard surface in the yard.