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Portland, Oregon
Construction Materials Testing in Portland, OR
Concrete, soil, and aggregate testing in Portland, Oregon — fresh concrete tests and cylinder breaks, Proctor and nuclear density, gradation, Atterberg limits, and soil corrosivity — by ACI- and NICET-certified technicians, with results reviewed and issued under a documented quality system.
- Dispatched from
- Seattle, WA regional hub · project-based mobilization
- Lead time
- Set in the proposal, with mobilization planned around your pour and earthwork schedule
- Laboratory
- Sugar Land, TX laboratory under chain of custody, or a mobile laboratory for large projects
- Reporting
- Reviewed and issued under a documented quality system; formatted for owner, engineer, and building-official review
- Serving
- Portland and the surrounding OR area — Eugene, Salem, Gresham
- Coverage
- Oregon statewide · 27 regional hubs
- Technicians
- ACI Grade I · NICET CMT · ICC special inspectors
- Call us
- (346) 420-5425
Scope
What we test in Portland
Concrete testing services
Fresh concrete sampled and tested at the pour — slump, air content, unit weight, and temperature — with cylinders and beams cast on site and broken in the laboratory on the schedule your specification calls for.
ASTM C172ASTM C143ASTM C231ASTM C173ASTM C138ASTM C1064ASTM C31ASTM C39
Aggregate testing services
Gradation, fines content, specific gravity and absorption, unit weight, abrasion resistance, and stockpile moisture for concrete, base course, and backfill aggregates.
ASTM D75ASTM C136ASTM C117ASTM C127ASTM C128ASTM C29ASTM C131ASTM C566
Soil compaction and density testing
Standard and modified Proctor curves in the laboratory and in-place density by nuclear gauge on every lift, so fill, subgrade, and trench backfill are documented against the specified percent compaction.
Soil classification and index testing
Sieve and hydrometer gradation, Atterberg limits, moisture content, specific gravity, and USCS classification for earthwork acceptance, select-fill verification, and geotechnical reports.
ASTM D6913ASTM D7928ASTM D1140ASTM D4318ASTM D2216ASTM D854ASTM D2487
Soil corrosivity testing
pH and electrical resistivity of backfill for MSE walls, pipelines, and buried structures, reported against the specification limits for metallic and geosynthetic reinforcement.
Special inspection (IBC Chapter 17)
ICC-certified special inspectors for reinforced concrete and soils, reporting to the building official alongside the materials test results, so one agency covers both requirements.
Full scope, standards list, and pricing basis: Construction Materials Testing.
Local conditions
Construction materials testing conditions in Portland
Portland's construction environment presents a specific set of demands that make rigorous materials testing essential from the first day of earthwork through the final structural pour. The Willamette Valley's fine-grained alluvial soils and historic fill areas require careful classification and compaction verification before foundations or pavements go in. The region's wet season — running well into spring — means concrete placement schedules must account for low ambient temperatures and elevated moisture that can affect hydration and early strength gain. Meanwhile, Portland's steady pipeline of mid-rise timber-hybrid and concrete-frame residential, commercial, and infrastructure projects means specifications are specific and agency oversight is real. Our technicians, dispatched through our Seattle regional hub, perform ASTM-compliant field and laboratory testing of concrete, soil, and aggregate — providing the documented results contractors, developers, and engineers need to keep schedules moving and satisfy building department and special inspection requirements.
Portland-area soils commonly include soft alluvial silts and clays in lower-elevation and river-adjacent zones, conditions that make Proctor moisture-density relationships and field compaction verification particularly consequential for subgrade performance. Cool, wet winters and springs can push fresh concrete temperatures close to ACI 306 cold-weather thresholds, making field temperature monitoring and early cylinder protection standard practice on Portland projects from roughly November through April.
FAQ · Portland
Portland gets significant rainfall into late spring — how does that affect when you can perform nuclear density or sand-cone compaction testing?
Soil compaction testing per ASTM D6938 (nuclear gauge) or ASTM D1556 (sand-cone) requires that the material being tested reflects the moisture condition at time of placement, not standing surface water. Our technicians will note ambient and material conditions on every field report. If a lift is saturated or has been disturbed by rain, the responsible party should allow the material to dry to near optimum moisture before testing — attempting to compact and test overly wet fine-grained soils common to the Portland area typically produces results that fail regardless of equipment effort.
What soil classification methods do you use, and does that satisfy Oregon DOT or City of Portland submittal requirements?
We classify soils using ASTM D2487 (USCS) and can also report AASHTO M 145 classification where project specifications call for it. Whether those results satisfy a specific Oregon DOT or City of Portland submittal depends on the project's contract documents and the reviewing agency's checklist — we provide the test data and a clear chain-of-custody report; the engineer of record typically makes the compliance determination for agency submittal.
Our project involves concrete pours scheduled for February and March. What cold-weather documentation do you provide?
For each concrete placement, our ACI-certified technicians record fresh concrete temperature per ASTM C1064 alongside slump (ASTM C143), air content (ASTM C231 for normal-weight concrete), and unit weight (ASTM C138). When temperatures approach thresholds outlined in ACI 306R, those recorded values are part of the field report. Cylinder fabrication follows ASTM C31, including documentation of initial curing conditions — critical when ambient temperatures risk dropping below 50°F during the protection period.
How fast can a technician be on site in Portland?
Portland work is dispatched through our Seattle, WA regional hub. Scheduled visits are set up by phone at (346) 420-5425; multi-day placements and full-time project assignments are scheduled through a proposal request.
Which office covers materials testing in Portland, OR?
Field work in Portland is dispatched through the Seattle, WA regional hub, about 145 miles away. Laboratory testing is performed in Sugar Land, TX under chain of custody, or in a mobile laboratory mobilized to large Portland projects.
Are the technicians you send to Portland certified?
Yes. Concrete technicians hold ACI Concrete Field Testing Technician Grade I; soils and laboratory technicians hold NICET Construction Materials Testing certifications; special inspection is performed by ICC-certified special inspectors. Where Oregon agencies or owners require state-specific certifications, those are confirmed in the proposal.
Hiring for project coverage. Field technician openings in Portland · all positions.
Scheduling & proposals
Need construction materials testing in Portland?
Call to schedule a technician, or send project documents for a written proposal.