High-Early-Strength Concrete, Engineered Backwards From Your Deadline
Agency panel work, structural repairs, anchor bolts, fast-track schedules — when the spec says “open at strength, not at 28 days,” we batch accelerated designs on site so the chemistry works for you instead of the drive time.
The 28-day curve is a default, not a law
Conventional concrete is specified around a 28-day strength because that's how portland cement behaves when nobody's in a hurry. High-early design flips the question: what strength do you need, and by when? A bridge deck patch that must carry traffic tonight, an anchor bolt that gets torqued tomorrow morning, a fast-track pour the framers stand on Thursday — each gets a different recipe.
The tools are well understood — cement type and content, accelerating admixtures, water-cement ratio, mix temperature. The catch is that every one of those tools makes the mix less tolerant of a long ride in a drum. Batching at the point of pour is what makes aggressive designs practical: the mix you specified is the mix that hits your forms, with its full working window intact.
Standard mixes, quoted rates
| Design | Typical use | Material rate |
|---|---|---|
| 3300 PSI / CDF | Flowable fill, non-structural backfill, mud slabs | $215 / yd³ |
| 3500 PSI | Footings, residential flatwork | $231 / yd³ |
| 4000 PSI ★ | Driveways, structural slabs, most commercial work | $247 / yd³ |
| 4500 PSI | Heavy-duty flatwork, loading areas | $263 / yd³ |
| 5000 PSI | Structural & agency work, high-wear surfaces | $279 / yd³ |
Plus $200 base delivery and $25 fuel per published rates (July 2026). High-early variants of any target — and DOT special-provision designs — are quoted per spec by dispatch at (503) 925-1002.
Accelerated chemistry hates the freeway
The clock starts at discharge
In a drum truck, an accelerated mix spends its working window in traffic. Volumetric batching starts hydration at your forms — the whole window belongs to your crew.
No retempering, ever
Water added to rescue a stiff load is strength you'll never get back. On-site batching makes the practice unnecessary — and your cylinder breaks predictable.
Design changes at the controls
Cap a structural pour with a high-early topping, or step PSI between elements, without a second truck from a plant.
Dispatched from the Tualatin Valley. Serving the I-5 corridor.
High-early and DOT work runs wherever the I-5 corridor takes us — Portland metro pours daily, and agency work is routed case-by-case.
Outside these cities? Call — corridor jobs and DOT work are routed case-by-case.
More rapid-set resources
Frequently asked questions
What counts as “high-early-strength” concrete?
Any mix designed to reach a specified strength well ahead of the conventional 28-day curve — usually via Type III or finely ground cements, accelerating admixtures, low water-cement ratios, heated mix water, or higher cement contents. The design target is whatever your spec defines as opening strength: a number and a deadline.
Can you meet DOT specifications for high-early mixes?
Yes — DOT-approved mixes are core to our commercial work, including high-early designs used for panel replacement and structure repair. Bring the agency spec or special provisions to dispatch and we'll batch to the submittal.
How do you verify strength for an early opening?
The governing document is always your spec: typically field-cured cylinders or maturity methods establish when opening strength is reached. We batch consistent, plant-grade material on site so your testing tells a clean story — no hot loads, no added water, no surprise variability between trucks.
Does high-early concrete crack more?
Accelerated mixes generate heat faster and can be less forgiving of poor curing, which is why finishing and curing practice matter more, not less. What actually causes premature failure in our experience is retempered drum loads — exactly the failure mode on-site batching eliminates.
What PSI mixes do you carry?
Published designs run 3300 PSI/CDF through 5000 PSI, with 4000 PSI the most commonly specified. High-early versions of those targets — and specialty admixture packages — are quoted per spec.
Send us the spec. We'll meet it on site.
Have your target strength, opening criteria and pour window ready — dispatch will confirm the design and the schedule on one call.
(503) 925-1002