EFFECT OF VARIOUS ACCELERATING CHEMICAL ADMIXTURES ON SETTING AND STRENGTH DEVELOPMENT OF CONCRETE

A study of the rate of hardening of concretes which contain inorganic accelerators demonstrates the superior performance of calcium chloride. However, there are significant changes in the compressive strength of concretes at various ages when accelerators are employed. Calorimetric studies of cement mortars show the advantages as an accelerator that calcium chloride maintains over other inorganic salts. Also, calorimetric tests demonstrate what appears to be different mechanisms of acceleration between different kinds of accelerators. Differential thermal analysis (DTA) techniques were applied to a study of the effect of calcium chloride and calcium formate on the early stages of hydration of a cement. DTA patterns show definite differences between the function of the accelerators. /Author/

• Supplemental Notes:
  • Presented at the ASTM Symposium on Acceleration of Setting and Hardening in Cement Pastes--Causes and Effects, Washington, D.C., June 27, 1974.
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Rosskopf, P A
  • Linton, F J
  • Peppler, R B
• Publication Date: 1975-7

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 322-330
• Serial:
  • ASTM Journal of Testing and Evaluation
  • Volume: 3
  • Issue Number: 4
  • Publisher: Federal Highway Administration

Subject/Index Terms

• TRT Terms: Admixtures; Calcium chloride; Calorimeters; Chemical reactions; Chemicals; Compressive strength; Concrete; Concrete hardening; Differential thermal analysis; Hardness; Hydration; Inorganic salts; Machines; Portland cement; Rates; Strength of materials; Vehicle accelerators
• Uncontrolled Terms: Strength development
• Old TRIS Terms: Accelerators; Mechanisms
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00126145
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 18 1975 12:00AM