Effect of Coarse Aggregate Properties on the Ductility of Lightweight Concretes

This paper presents the variation of the ductility of lightweight concrete made with cold-bonded fly ash aggregates, produced by cold-bonding process through the pelletization of moistened fly ash-cement mixtures at room temperature. Lightweight concretes with and without silica fume were cast at 0.35 and 0.55 w/c rations with fly ash pellets as coarse aggregates and natural sand as fine aggregate. Lightweight aggregates were incorporated into the mixes at 30, 45, and 60 percent of the total aggregate volume and with 9.5 and 15 mm maximum particle sizes, respectively. In this manner 24 concrete mixtures were designed and tested in order to evaluate the compressive strength, static elastic modulus, and splitting tensile strength. In addition, three-point bending tests on notched beams were conducted to determine the fracture toughness and the characteristic length as a measure of ductility. Test results have revealed that he ductility of the lightweight concretes increased with higher coarse aggregate volume content and larger particle size, and decreased with the use of silica fume and low w/c ratio in the concretes. Also, the characteristic length reduced with the increase in compressive strength as in normal weight concrete.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727732471
• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • Gesoglu, M
  • Ozturan, T
  • Guneyisi, E
• Conference:
  • Proceeding of the International Symposium Dedicated to Professor Surendra Shah, Northwestern University, USA
  • Location: Dundee Scotland, United Kingdom
  • Date: 2003-9-3 to 2003-9-4
• Publication Date: 2003

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 537-546
• Monograph Title: Role of Concrete in Sustainable Development

Subject/Index Terms

• TRT Terms: Adhesive bond strength; Bending; Cement; Coarse aggregates; Cold coated materials; Compressive strength; Ductility; Fly ash; Lightweight concrete; Mixtures; Temperature endurance tests
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01010823
• Record Type: Publication
• ISBN: 0727732471
• Files: TRIS
• Created Date: Nov 30 2005 7:26AM