Where must the results of trial mixes for a concrete mixture be recorded?

The results of trial mixes for a concrete mixture must be recorded on the PCC Mix Design form for the mixture because this form is specifically designed to document all relevant parameters related to the mix. It provides a comprehensive overview of the material properties, proportions, and performance characteristics that were evaluated during the trial mixing process.

Recording the trial mix results on this form is crucial because it ensures that the information is organized, accessible, and standardized for future reference and quality control. This documentation is essential for verifying that the concrete mixture will meet the specified requirements and for making any necessary adjustments.

While other documents like the project ledger, design specifications document, and quality assurance report may involve important information regarding the project, they do not serve the specific purpose of detailing the trial mix results in the same systematic manner as the PCC Mix Design form does. Therefore, using the designated form is critical for maintaining clarity and compliance in the concrete mixing process.