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Gresham, Oregon
Construction Materials Testing in Gresham, OR
Concrete, soil, and aggregate testing in Gresham, 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
- Gresham 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 Gresham
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 Gresham
Gresham sits at the eastern edge of the Portland metro, where the Cascade foothills meet the Columbia River corridor and construction ranges from industrial and logistics facilities near the interstate to residential subdivisions pushing into hillside terrain. That terrain brings variability: volcanic-origin soils, seasonal rainfall that can compromise subgrade bearing capacity for months at a time, and concrete placement windows that demand close attention to temperature, set time, and curing conditions. Getting materials testing right here is not a formality — it protects structural performance, satisfies Oregon-adopted IBC special inspection requirements, and gives project owners defensible documentation when questions arise later. Our firm dispatches certified field technicians to Gresham on a scheduled and project-based basis, covering fresh concrete testing, cylinder fabrication and breaks, aggregate gradation and quality, Proctor compaction, nuclear density gauging, soil classification, and soil corrosivity testing — all performed to applicable ASTM standards under a documented laboratory quality system.
Soils in the Gresham area commonly include fine-grained silts and clays associated with regional volcanic and alluvial deposits, which can be sensitive to moisture content changes and require careful Proctor-based compaction control during the extended wet season. Concrete construction during Oregon's cool, wet winters calls particular attention to fresh concrete temperature monitoring and protection requirements under ACI 306.
FAQ · Gresham
Our Gresham project involves hillside grading with highly variable soils — what classification and compaction testing will we need?
Variable subgrade conditions typically require soil classification under ASTM D2487 (Unified Soil Classification System) to identify material type and guide compaction specifications. Field density is then verified by nuclear gauge per ASTM D6938, compared against a laboratory Proctor curve established under ASTM D698 or D1557. Where moisture-sensitive fine-grained soils are present, additional moisture-density relationship testing may be needed as cut conditions change across the site.
Gresham winters are wet. How does that affect concrete cylinder testing and curing requirements?
Cold and wet conditions require fresh concrete temperature to be documented at the point of discharge — ACI 306 sets a minimum placement temperature that varies by section thickness. Field-fabricated cylinders must be protected from freezing during the initial 24-hour cure per ASTM C31, which often means insulated transport or job-site curing boxes. Cylinders are then transported to the laboratory for standard curing and compression testing per ASTM C39 at specified break ages.
The City of Gresham or our structural engineer of record will require special inspection reports — what does your testing documentation include?
Each report identifies the test method, sample location, applicable ASTM designation, field conditions at the time of testing, and results compared against the project specification or acceptance criteria. Reports are generated under our documented quality system and formatted to support IBC Chapter 17 special inspection submittals. Project engineers and inspectors of record can use the reports directly in their statement of special inspections documentation.
How fast can a technician be on site in Gresham?
Gresham 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 Gresham, OR?
Field work in Gresham is dispatched through the Seattle, WA regional hub, about 146 miles away. Laboratory testing is performed in Sugar Land, TX under chain of custody, or in a mobile laboratory mobilized to large Gresham projects.
Are the technicians you send to Gresham 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 Gresham · all positions.
Scheduling & proposals
Need construction materials testing in Gresham?
Call to schedule a technician, or send project documents for a written proposal.