What precaution should be taken when sampling to avoid compromising the material?

When sampling materials for testing, it is crucial to avoid any possibility of contamination. Contaminating samples can significantly compromise the integrity of the material being tested, leading to unreliable results that may not truly reflect the material's properties or suitability for use. Contamination can occur from various sources, including foreign materials, moisture, or even residues from previous samples.

Maintaining the purity of the sample is essential to ensure accurate assessments in the laboratory and helps in making informed decisions about the quality and characteristics of the aggregate materials being used. By following proper sampling techniques and using clean tools and containers, technicians can safeguard against contamination and ensure that the testing process produces valid results.