Download PDF version (412.1k). The full text of this article is available as a PDF document.
To ensure that ready mix plants are well-maintained and up-to-date, the National Ready Mixed Concrete Association (NRMCA) has a plant certification program. To be eligible for a certificate, a plant must be inspected for conformance by a registered professional engineer using a detailed checklist. Some important highlights of the checklist include: Material storage and handling--the inspection will cover cement, aggregate, water and admixture storage; batching equipment--scales, weigh batchers, volumetric batching devices for water, dispensers for liquid admixtures, accuracy of plant batching, batching systems, and recorders are all inspected; central mixing operations and shrink mixing operations are examined; the ticketing system is checked to ensure the proper information appears on tickets; delivery fleet--all truck mixers, agaitators, and nonagitating units used to deliver concrete from the plant will be examined.