MIXING CONCRETE IN A TRUCK MIXER

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

• TRT Terms: Blending; Concrete mixers; Concrete mixing; Gravel; Loads; Mix design; Mixing; Quartz; Ready mixed concrete; Sand; Speed; Tempering; Test procedures; Testing; Water
• Uncontrolled Terms: Batching; Loading
• Old TRIS Terms: Mixing procedures; Quartz gravels; Test results
• Subject Areas: Construction; Highways; Materials;

Filing Info

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