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dc.contributor.authorTom, Joe G.-
dc.descriptionTechnical Report-
dc.descriptionAbstract: The Rapid Analysis Machine (RAM) is a semiautomatic means of determining the cement content of freshly mixed concrete. Developed in England, the RAM incorporates the concepts of particle behavior as a function of size and mass in its determination of cement content. Five minutes after an 8-kg sample of concrete has been introduced into the RAM, the cement content can be determined from a set of calibration curves. A series of typical concrete field mixtures was used to evaluate the RAM. These mixtures had cement contents ranging from 300 to 1000 lb/yd³; several contained fly ash at a 30 percent replacement rate by volume, and one contained an admixture which entrained a total air content of 6 percent. The actual RAM unit evaluated could detect and determine the cement content to within ±12.3 percent of the original cement content. It was found that air-entrained concrete must be treated differently before testing to ensure that the results have not been affected by the entrained air bubbles.-
dc.publisherStructures Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesTechnical report (U.S. Army Engineer Waterways Experiment Station) ; SL-82-4.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectCement content-
dc.subjectConcrete testing-
dc.subjectRapid Analysis Machine-
dc.titleInvestigation of the Rapid Analysis Machine (RAM) for determining the cement content of fresh concrete-
Appears in Collections:Technical Report

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