Compressive strength, unit weight, and volume changes of concrete for ages up to 50 years have been determined. Variables included are types of cement and coarse aggregate, mix proportions, consistency, methods of placement, and storage conditions. Over 2500 concrete cylinders, 132 concrete expansion prisms, and several thousand mortar cylinders and briquets were made in 1910, 1923, and 1937 for this program. Earlier reports on these tests were published in 1931, 1943, and 1961. Under outdoor storage in Madison the compressive strength of concrete made with coarsely ground cements having high C2S contents generally increased as the log cf the age out to 50 years, but concrete made with finer cements having relatively low C2S contents appeared to reach maximum strength at ages between 10 to 25 years and showed some retrogression thereafter.

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  • Accession Number: 00083601
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 8 1975 12:00AM