Home / Services / Materials Testing / Hillsboro, OR
Hillsboro, Oregon
Construction Materials Testing in Hillsboro, OR
Concrete, soil, and aggregate testing in Hillsboro, 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
- Hillsboro and the surrounding OR area — Portland, Eugene, Salem
- 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 Hillsboro
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 Hillsboro
Hillsboro sits at the center of one of the Pacific Northwest's most active construction corridors, where semiconductor fabrication campuses, logistics facilities, and multifamily housing are reshaping the Tualatin Valley floor at a sustained pace. Building on the region's native silts, clays, and weathered basalt-derived soils demands materials testing that keeps pace with compressed schedules and Oregon agency documentation requirements. Our firm dispatches ACI- and NICET-certified field technicians to Hillsboro project sites for ASTM-compliant concrete, aggregate, and soil testing — fresh concrete properties, compressive strength cylinders, gradation, Proctor compaction, nuclear density, soil classification, and corrosivity. Results move through a laboratory operating under a documented quality system, producing defensible reports that hold up with engineers of record, Washington County inspectors, and Oregon DOT reviewers. Coverage is coordinated through our regional dispatch network on a scheduled or project-basis to fit your production calendar.
The Tualatin Valley floor beneath much of Hillsboro includes fine-grained alluvial and lacustrine soils with variable compressibility and moisture sensitivity, making Proctor moisture-density relationships and in-place density verification particularly consequential for subgrade and structural fill acceptance. Oregon's wet winters also compress the window for outdoor concrete placement and compaction work, so coordinating testing around seasonal conditions is a practical part of project planning in this region.
FAQ · Hillsboro
What soil classification tests do you run, and why do they matter for projects on the Tualatin Valley floor?
We perform ASTM D2487 (Unified Soil Classification System) testing, including Atterberg limits under ASTM D4318 and grain-size analysis under ASTM D6913 and D7928. On the Tualatin Valley floor, fine-grained soils with elevated plasticity indices can be highly sensitive to moisture changes, and proper classification is the foundation for specifying acceptable fill, establishing compaction targets, and evaluating subgrade bearing capacity.
How do Oregon's rainy winters affect concrete cylinder break programs, and how do you account for that?
Sustained cold and wet conditions affect concrete setting times, placement temperatures, and early-age strength gain. Our technicians record fresh concrete temperature per ASTM C1064 and slump per ASTM C143 at the point of placement. When ambient temperatures approach ACI 306 cold-weather thresholds, those field measurements become critical documentation that the concrete was placed within specification tolerances, protecting the contractor and the project record.
Can you support Washington County or City of Hillsboro building department special inspection requirements for concrete and soil?
Yes. IBC Chapter 17 requires special inspection programs — including continuous and periodic inspection of concrete placement and compaction of controlled fill — to be performed by qualified individuals and documented for the authority having jurisdiction. Our ACI-certified technicians perform the field observations and testing, and our reports are formatted to support the statement of special inspections your engineer of record files with the local building department.
How fast can a technician be on site in Hillsboro?
Hillsboro 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 Hillsboro, OR?
Field work in Hillsboro is dispatched through the Seattle, WA regional hub, about 147 miles away. Laboratory testing is performed in Sugar Land, TX under chain of custody, or in a mobile laboratory mobilized to large Hillsboro projects.
Are the technicians you send to Hillsboro 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 Hillsboro · all positions.
Scheduling & proposals
Need construction materials testing in Hillsboro?
Call to schedule a technician, or send project documents for a written proposal.