EFFECT OF AGGREGATES ON CONCRETE PROPERTIES

This paper presents a study of the characteristics of concretes with aggregates of low quality. Acoustic emission (AE) measurements were performed during uniaxial compression tests of concrete specimens. The AE measurement system included a one- dimensional location system, using two transducers installed on the side of the concrete specimen in the axial direction. To improve accuracy, AE source location was performed only at the specimen's centre. It was found that: (1) the compressive strength and static Young's modulus of concrete, containing inferior aggregates with low density and high absorption, are lower than those of concrete with good aggregates; (2) because of varying compressive strength, it is not always possible to use the compressive strength of concrete for accurate evaluation of aggregate quality; (3) during the uniaxial compressive testing of concrete with good aggregates, most of the AE signals occur at a stress level near the breaking point and many AE signals have relatively high amplitude; and (4) in concrete with poor aggregates, many AE signals are generated at a low stress level, and the AE signals are generally small. Thus the quality of aggregate appears more clearly in the static Young's modulus than in the compressive strength of the concrete. For the covering abstract of the conference see IRRD 858334. The French title of this paper is:- Effet des granulats sur les proprietes du beton. The German title of this paper is:- Wirkung von Zuschlagstoffen auf die Eigenschaften von Beton.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/3857480579
• Corporate Authors:

  International Association for Bridge and Structural Engineering

  ETH-Honggerberg, Wolfgang-Pauli-Strasse 15
  Zurich 8093,   Switzerland  CH-8093
• Authors:
  • HIRONAKA, Y
  • SAKOTA, K
  • Kimura, S
  • Ishibashi, T
• Publication Date: 1989

Language

• English

Media Info

• Features: References;
• Pagination: p. 261-6
• Serial:
  • DURABILITY OF STRUCTURES. IABSE SYMPOSIUM, SEPTEMBER 6-8 1989, LISBON (IABSE REPORT VOLUME 57/1)
  • Publisher: International Association for Bridge and Structural Engineering

Subject/Index Terms

• TRT Terms: Aggregates; Audible warning devices; Compression; Concrete; Conferences; Modulus of elasticity; Signals; Strength of materials; Test procedures
• ITRD Terms: 4577: Aggregate; 585: Aural signal; 5532: Compression; 4755: Concrete; 8525: Conference; 5919: Modulus of elasticity; 5544: Strength (mater); 6288: Test method
• Subject Areas: Data and Information Technology; Geotechnology;

Filing Info

• Accession Number: 00636093
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 3-85748-057-9
• Files: ITRD
• Created Date: Sep 24 1993 12:00AM