EFFECT OF AGGREGATE ON THE FRACTURE PROCESS OF CONCRETE

The study was carried out to see how the amount of aggregate in a matrix affects the fracture process of mortar and concrete. Crack arresting action of matrix-aggregate interfaces was studied by means of fracture indices, in accordance with Griffith's concept. In all of the tests the properties of matrices were fixed. From test results fracture process seems to depend largely on the amount and shape of the aggregate. Within a certain aggregate ratio where the properties of matrices do not change, critical strain energy release rate or fracture toughness and critical stress intensity factor of mortar and normal concrete increased with an increase of aggregate volume ratio, while that of lightweight concrete decreased. The rate of increase seems to relate to the aggregate shape. These tendencies were verified by model analysis. (A) See also IRRD Abstract No. 205029

• Supplemental Notes:
  • Proceedings of the Society of Materials Science Conference on the Mechanical Behavior of Materials.
• Corporate Authors:

  Society of Materials Science

  1 Yoshida Izumidono-cho, Sakyo-Ku
  Kyoto 600,   Japan 

  Society of Materials Science

  1 Yoshida Izumidono-cho, Sakyo-Ku
  Kyoto 600,   Japan 

  Society of Materials Science

  1 Yoshida Izumidono-cho, Sakyo-Ku
  Kyoto 600,   Japan 
• Authors:
  • Okada, K
  • Koyanagi, W
• Conference:
  • Proceedings of the Society of Materials Science Conference on the Mechanical Behavior of Materials.
• Publication Date: 1972

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 72-83

Subject/Index Terms

• TRT Terms: Aggregates; Aggregates by shape and surface texture; Concrete; Cracking; Deformation; Fracture mechanics; Matrices (Mathematics); Mix design; Stresses
• Uncontrolled Terms: Aggregate shape; Concrete cracking
• ITRD Terms: 4577: Aggregate; 4755: Concrete; 8525: Conference; 5211: Cracking; 5595: Deformation; 5520: Failure; 8053: Japan; 4714: Mix design; 9073: Shape; 5575: Stress (in material)
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00083872
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Conf Paper
• Files: ITRD, TRIS
• Created Date: May 29 1975 12:00AM