What are the minimum requirements that a contractor must meet, for documenting the proper concrete mix used in cast-in-place concrete projects?
A. Concrete mix tickets are required for all concrete projects. Mix tickets should include the mix strength, type of cement, type of admixtures, time loaded, time load arrived at job site, and time unloading is complete. If this information is not included on the ticket, the concrete supplier shall provide documentation with the minimum information for the design mix.