What Is ASTM C39 Concrete Compressive Strength?
ASTM C39 determines the compressive strength of cylindrical concrete specimens by applying axial load until failure. This test is one of the most important methods for evaluating the strength and quality of concrete used in construction.
It is widely used in construction, infrastructure, and civil engineering projects. The results help ensure that concrete meets design specifications and can safely withstand applied loads.
Applications and Benefits of ASTM C39 Concrete Compressive Strength Testing
Scope
ASTM C39 evaluates the compressive strength of hardened concrete using standardized cylindrical specimens. The test measures the maximum load the specimen can withstand before failure.
The test evaluates:
- Compressive strength of concrete
- Load-bearing capacity of concrete structures
- Quality and consistency of concrete mix
- Performance under axial compression
- Suitability for structural applications
Applications
- Structural concrete in buildings and bridges
- Pavements and road construction
- Precast and cast-in-place concrete
- Infrastructure and foundation projects
- Quality control in concrete production
- Civil engineering testing
Benefits
- Provides accurate strength measurement of concrete
- Ensures compliance with construction standards
- Supports structural design and safety
- Helps monitor concrete quality during production
- Enables comparison of concrete mixes
Our ASTM C39 Testing Procedure
Sample Preparation
Cylindrical concrete specimens are cured and prepared to required dimensions.
1Specimen Alignment
Samples are placed centrally in the compression testing machine.
2Load Application
Axial load is applied at a controlled rate until failure occurs.
3Data Recording & Evaluation
Maximum load is recorded to calculate compressive strength.
4ASTM C39 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Applicable Materials | Concrete (cylindrical specimens) |
| Specimen Size | ~150 mm × 300 mm (standard) |
| Strength Range | ~10 MPa to 100 MPa |
| Loading Rate | ~0.25 MPa/s to 0.35 MPa/s |
| Test Age | Typically 7, 14, or 28 days |
| Measured Outputs | Compressive strength (MPa) |
- Compression testing machine
- Load cell and control system
- Specimen capping or grinding equipment
- Alignment fixtures
- Measuring tools
- Data acquisition system
Equipment and Instrumentation Used for ASTM C39 Testing
What You Receive: Test Report, Data, and Certification
- Compressive strength values (MPa)
- Failure load and mode
- Concrete quality assessment
- Comparative mix analysis
- Test condition summary
- ASTM compliance report
ASTM C39 Concrete Compressive Strength FAQs
ASTM C39 includes compressive load, specimen diameter, height-to-diameter ratio, loading rate, curing conditions, and failure mode, evaluating compressive strength of cylindrical concrete specimens under controlled laboratory testing conditions.
ASTM C39 determines compressive strength, calculated from maximum load applied to the specimen, indicating structural capacity of concrete.
ASTM C39 is commonly applied to concrete cylinders prepared from fresh concrete used in construction and structural applications.
ASTM C39 requires a compression testing machine, loading platens, and specimen alignment devices to apply controlled compressive forces accurately.
ASTM C39 evaluates compressive strength under controlled laboratory conditions and may not fully represent in-situ concrete performance affected by curing, placement, and environmental conditions.
ASTM C39/C39M determines the compressive strength of cylindrical concrete specimens by applying a steadily increasing compressive load until failure. The maximum load is divided by the specimen's cross-sectional area to calculate compressive strength, helping assess concrete quality and compliance with specifications.
Under ASTM C39/C39M, cured concrete cylinders are measured and placed in a calibrated compression-testing machine. A controlled load is applied until the cylinder fails, and the maximum load is recorded to determine its compressive strength.
ASTM C39/C39M measures the compressive strength of molded concrete cylinders and drilled concrete cores. The specimen is properly prepared, centered in the testing machine, and loaded until failure. The calculated strength is reported in MPa or psi for quality control and concrete acceptance.
Why Choose Infinita Lab for Concrete Compressive Strength Testing
When your Concrete Compressive Strength results have to hold up - for compliance, a customer audit, or an engineering decision - ASTM C39 accuracy and an unbiased third-party report matter more than price. Infinita Lab routes your ASTM C39 concrete compressive strength testing to ISO/IEC 17025-accredited U.S. partner labs with hands-on method experience, so you get defensible data, transparent reporting, and turnaround times built around your project deadline - not ours.
Need ASTM C39 Concrete Compressive Strength Testing You Can Rely On?
Send query us at hello@infinitalab.com or call us at (888) 878-3090 to learn more about our services and how we can support you.
