An extensive study was made for evaluation of strength performance during normal concrete production. A comparison was made between the strength of a conventionally mixed concrete and that of concrete produced with premixed paste. The study reported here investigated various premixer operating parameters including mixer speed, mixing time, and batch size. The paste mixer and batching/mixing plant are described, and details are given of the testing program and evaluation. The results confirm the improved performance of portland cement concrete containing premixed paste under most of the conditions examined and mixtures tested. The field study results show that the performance of the paste mixer relates to at least 4 parameters: mix porportions; batch size; mixer RPM; mixing time. Under optimum conditions at this stage of mixer development, paste premixing can produce a significant improvement in compressive strength in excess of 20% at 28 days.

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 82-85
  • Serial:
    • Concrete International
    • Volume: 11
    • Issue Number: 11
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 00489452
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 30 1989 12:00AM