This project involved a total of 204 batches of ready mixed concrete tested in 1969, 340 batches tested in 1970, and 126 batches tested in 1972. Batches varied from 6-10 cubic yard. The concrete was designed to contain 5.0 sacks of cement per cubic yard, 5-6 percent entrained air and to have a slump of 3 or 4 inches. This majority of tests were made using a 1-inch maximum size natural quartz gravel and a natural siliceous sand. Following a discussion of test procedures, test results were presented. Conclusions and recommendations were made with regard to the following: method of loading, blending fine and coarse aggregate, ribbon loading, cement-last loadings, sandwich loading, double batching, slurry mixing, mixing revolutions, mixing speed, tempering water, charging speed and inclination, batch size, and concrete proportions and materials.

  • Corporate Authors:

    National Ready Mixed Concrete Association

    900 Spring Street
    Silver Spring, MD  United States  20910
  • Authors:
    • Gaynor, R D
    • Mullarky, J I
  • Publication Date: 1975-1

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: 24 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00083148
  • Record Type: Publication
  • Report/Paper Numbers: No. 148
  • Files: TRIS
  • Created Date: Mar 26 1975 12:00AM