EFFECT OF CEMENT PROPERTIES AND THE THERMAL COMPATIBILITY OF AGGREGATES ON THE STRENGTH OF ACCELERATED CURED CONCRETE

IN THE PRESENT RESEARCH ELECTRIC CURING WAS ADOPTED, COMPLETELY ELIMINATING ANY TEMPERATURE GRADIENTS THROUGHOUT THE TEST SPECIMENS. IT WAS FOUND THAT COARSE AGGREGATES HAVING A LOW COEFFICIENT OF THERMAL EXPANSION CAUSED A SIGNIFICANT DROP IN THE ONE-DAY ACCELERATED CURED COMPRESSIVE STRENGTH. THE COEFFICIENT OF THERMAL EXPANSION OF THE COARSE AGGREGATE DID NOT HAVE MUCH EFFECT ON THE 28-DAY ACCELERATED CURED STRENGTH. IT WAS THOUGHT THAT THIS WAS DUE TO AUTOGENOUS HEALING DURING THE 27 DAYS OF NORMAL CURING, RECTIFYING ANY CRACKING CAUSED THROUGH STRESSES ARISING FROM THERMAL INCOMPATIBILITIES DURING THE ONE DAY OF ACCELERATED CURING. RESIDUAL EXPANSION AFTER HEATING AND COOLING OF CERTAIN AGGREGATES WAS LIABLE TO CAUSE DECREASES IN STRENGTH. FURTHER EVIDENCE IS GIVEN OF THE IMPORTANCE OF THE C (SUB 3)A CONTENT OF CEMENT IN DETERMINING THE ULTIMATE STRENGTH OBTAINED WHEN THE CONCRETE IS SUBJECTED INITIALLY TO ACCELERATED CURING.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00903973
• Authors:
  • Orchard, D F
  • Jones, R
  • Al-Rawi, R S
• Publication Date: 1974-2

Media Info

• Pagination: p. 95-101
• Serial:
  • Journal of Testing and Evaluation
  • Volume: 2
  • Issue Number: 2
  • Publisher: American Society for Testing and Materials (ASTM)
  • ISSN: 0090-3973
  • EISSN: 1945-7553
  • Serial URL: https://www.astm.org/DIGITAL_LIBRARY/JOURNALS/TESTEVAL/index.html

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Aggregates; Cement content; Coarse aggregates; Compressive strength; Concrete; Concrete curing; Electricity; Strength of materials; Thermal expansion; Time
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00214339
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 26 1974 12:00AM