What does the Materials Sampling Manual specify regarding the frequency of sampling admixtures?

The Materials Sampling Manual states that one sample for each shipment of admixtures is necessary to ensure quality control and compliance with specifications. This practice allows for the assessment of the consistency and performance of the admixture, providing a reference for testing and verifying that the materials meet the required standards before being used in construction projects. By sampling each shipment, potential variations in the material can be identified and addressed, promoting the integrity of the overall concrete mix and ensuring that it performs as intended. This frequency also facilitates traceability in the event of any issues that may arise later.