MaTestLab > Test Standards > ASTM C39 Compressive Strength of Cylindrical Concrete Specimens
ASTM C39 Compressive Strength of Cylindrical Concrete Specimens
ASTM C39 provides a standard method for determining the compressive strength of cylindrical concrete specimens. This method is widely used in the construction industry to evaluate the quality of concrete and ensure that it meets the necessary specifications for its intended use.
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Introduction to ASTM C39
ASTM C39 is a standard test method used to determine the compressive strength of cylindrical concrete specimens. The method involves applying a compressive load to a concrete cylinder until failure occurs. The compressive strength is calculated as the maximum load divided by the cross-sectional area of the specimen. The results obtained through this method are especially used for quality control, reliability check, performance evaluation, and specification purposes.
Compressive strength is an important characteristic of concrete as it determines the load-carrying capacity of concrete structures. ASTM C39 provides a standard method for determining the compressive strength of concrete, which is widely used in the construction industry. The final values of the procedure are stated in standard units of SI.
ASTM C39 Test Method
The test method ASTM C39 involves preparing and testing cylindrical concrete specimens under axial compressive loads. The test is typically performed in a compression testing machine, which applies a compressive load to the specimen until it fails. The test method involves the following steps:
Specimen Preparation
Cylindrical concrete specimens are prepared by casting concrete in cylindrical molds. The molds are typically 6 inches in diameter and 12 inches in height. The concrete is placed in the mold in three equal layers and each layer is compacted with a standard tamping rod.
Curing
After casting, the specimens are covered with a damp cloth and stored in a temperature and humidity-controlled environment for a specified curing period, typically 28 days.
Testing
The specimens are placed in the compression testing machine and loaded at a constant rate until failure occurs. The load and deformation are recorded during the test.
ASTM C39 Specimens
Specimen details
The specimen used in the ASTM C39 test method is a cylindrical concrete specimen.
Specimen dimensions
The acceptable specimen size for ASTM C39 is typically 6 inches in diameter and 12 inches in height.
Specimen preparation
The concrete is prepared by mixing cement, fine and coarse aggregates, and water in the required proportions. The concrete is then cast into the cylindrical mold in three equal layers, and each layer is compacted using a standard tamping rod.
ASTM C39 Results
The results of the ASTM C39 test method are reported as the compressive strength of the concrete specimen. The compressive strength is calculated by dividing the maximum load by the cross-sectional area of the specimen. The results are used to evaluate the quality of the concrete and to ensure that it meets the necessary specifications for its intended use. This method determines the load-carrying capacity of concrete structures, and ensures the safety and reliability of these structures.
Tests related to ASTM C39
ASTM C39 is related to several other ASTM standards that measure the properties of concrete. These standards include ASTM C78 for flexural strength of concrete, ASTM C496 for splitting tensile strength of concrete cylinders, and ASTM C469 for static modulus of elasticity and Poisson’s ratio of concrete in compression. These tests are commonly used in conjunction with the ASTM C39 test method to fully evaluate the properties of concrete.
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The required number of samples or specimens should comply with the procedure given in the astm c39 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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The turnaround time for astm c39 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
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You can share your astm c39 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm c39 test to various testing techniques.
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