What is the result of performing a compressive strength test on improperly aligned specimens?

Performing a compressive strength test on improperly aligned specimens results in unreliable test outcomes due to the uneven distribution of the load. When the specimen is not properly aligned in the testing apparatus, the force applied may not be uniformly spread across the surface area. This can lead to localized stress concentrations, where certain areas of the specimen experience significantly higher levels of stress than others. Consequently, the measurements obtained may not accurately reflect the true strength of the concrete material being tested.

In addition, misalignment may cause the specimen to fail in an unexpected way, leading to inconsistent results that could complicate the interpretation of the concrete's strength properties. Therefore, ensuring proper alignment is crucial for obtaining reliable and repeatable results in compressive strength testing.