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Horry County, South Carolina
Construction Materials Testing in Horry County, SC
Concrete, soil, and aggregate testing in Horry County, South Carolina — 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
- Raleigh, NC 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
- Horry County, SC — Columbia, Charleston, North Charleston
- Coverage
- South Carolina statewide · 27 regional hubs
- Technicians
- ACI Grade I · NICET CMT · ICC special inspectors
- Call us
- (346) 420-5425
Scope
What we test in Horry County
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 Horry County
Horry County's construction market is shaped by coastal proximity, a high water table in many areas, and the continued growth of the Grand Strand — from resort and mixed-use development along the coast to logistics, healthcare, and residential expansion inland toward Conway and beyond. That combination puts real pressure on materials testing: sandy, low-plasticity coastal soils demand careful compaction verification, concrete work in hot and humid South Carolina summers requires close attention to slump, air content, and set time before cylinders are cast, and the region's aggressive exposure conditions make aggregate and mix quality critical over the life of a structure. Our field technicians, holding ACI and NICET certifications, cover Horry County for scheduled and project-based assignments dispatched through our Raleigh regional hub. In the laboratory, every test runs under a documented quality system. Results are reported in clear, defensible formats that satisfy engineer-of-record review and local authority submittals.
Much of Horry County's native soil profile is fine-grained sand or sandy loam with low bearing capacity, and groundwater can be encountered at shallow depths across low-lying areas near the Intracoastal Waterway and tidal tributaries — conditions that make Proctor reference testing and in-place density verification especially consequential. South Carolina's warm, humid climate extends the season for concrete placement but also shortens the window to complete fresh concrete testing before hydration accelerates, making prompt field sampling and cylinder preparation a practical necessity on every pour.
FAQ · Horry County
Our project is near the Intracoastal Waterway and we're concerned about subgrade variability. What testing do we typically need?
Shallow groundwater and variable fill common in low-lying Horry County sites usually call for a full soil classification program under ASTM D2487, moisture-density relationships per ASTM D698 or D1557, and in-place compaction verification by nuclear gauge (ASTM D6938) or sand cone (ASTM D1556). Results guide subgrade improvement decisions before structural fill or slabs are placed.
What concrete tests are performed at the point of discharge on a Horry County pour?
At the truck, our ACI-certified technicians measure slump (ASTM C143), air content (ASTM C231 for air-entrainment verification), concrete temperature (ASTM C1064), and unit weight (ASTM C138). Cylinders are cast per ASTM C31, cured in field conditions initially, then transported for compressive strength breaks at the laboratory under ASTM C39 at specified ages.
Summers in Myrtle Beach get hot fast. How does heat affect my concrete testing, and what should I tell my technician?
High ambient and mix temperatures accelerate hydration, which shortens the workability window and can reduce long-term strength. ACI 305R addresses hot-weather concreting practices. Alert the technician when concrete temperature at discharge approaches or exceeds specification limits — typically 90°F or a project-specific cap — so temperature, slump, and cylinder casting are completed without delay after truck arrival.
How fast can a technician be on site in Horry County?
Horry County work is dispatched through our Raleigh, NC 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 Horry County, SC?
Field work in Horry County is dispatched through the Raleigh, NC 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 Horry County projects.
Are the technicians you send to Horry County 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 South Carolina agencies or owners require state-specific certifications, those are confirmed in the proposal.
Scheduling & proposals
Need construction materials testing in Horry County?
Call to schedule a technician, or send project documents for a written proposal.