AGGREGATE - THE DECISIVE ELEMENT IN THE FROST RESISTANCE OF CONCRETE. CONCRETE DURABILITY. KATHERINE AND BRYANT MATHER INTERNATIONAL CONFERENCE, HELD AT ATLANTA, GEORGIA, USA, 27 APRIL-MAY 1987

The frost resistance of concrete is considerably influenced by aggregate. The aggregate must meet the conditions which are required in different specifications in regard to their mineralogical composition, grading curve, limit of fine particles, resistance to degradation (method with sodium sulphate), etc. The existing laboratory methods for testing the frost resistance of aggregates can only show the relative frost resistance of these; they cannot predict the performance of concrete made from these aggregates. It is necessary to test the response of concrete made from these aggregates to cycles of freezing. Experimentation was done to determine the influence of mineralogical structure, physical-chemical properties of aggregate and their granulometric composition (especially the fine fraction). The influence of cement type and content and of admixture on the resistance of concrete to freezing was included. Investigations were done using measurements of the logarithmic decrement from the resonance curve as well as from the decay curve of the free vibrations. For comparison, the dynamic modulus of elasticity variation and the variations of strength in compression and tensile of concrete were used. The value of the logarithmic decrement is given, when above that value the concrete is not resistant to frost damage. (Author/TRRL)

• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Teoduru, G
• Publication Date: 1987

Media Info

• Features: References;
• Pagination: p. 297-310
• Serial:
  • Publication of: American Concrete Institute
  • Publisher: American Concrete Institute

Subject/Index Terms

• TRT Terms: Aggregates; Concrete; Concrete tests; Conferences; Durability; Freeze thaw durability; Materials tests; Modulus of elasticity; Specifications
• Uncontrolled Terms: Aggregate testing
• ITRD Terms: 4577: Aggregate; 5532: Compression; 4755: Concrete; 8525: Conference; 5910: Durability; 2577: Freezing thawing cycle; 2585: Frost; 6200: Particle size distribution; 5544: Strength (mater); 5502: Tension; 6255: Test
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00470559
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Aug 31 1988 12:00AM