Use of Mineral Additions in Self-Compacting Concrete

To take care of its properties in fresh state, self-compacting concrete (SCC) demands a high powder content in its composition, about 450kg/m³. The quarry dust, resultant material of the coarse aggregate production,, appear as an economic and sustainable alternative in the development of the SCC. Using the mix design for SCC developed by Tutikian [4] a study for evaluation of the SCC mechanical properties was done, where natural sand had been partially replaced by quarry - micaschist and granite - and cement replaced by silica fume and metakaolin. To compose the mix design curves, 3 different compositions had been determined - 1:3, 1:4,5 and 1:6 (cement:dry material) in 5 types of concrete - reference (without additions), silica fume, metakaolin, powder-of-micaschist and powder-of-granite. The test methods in fresh state used was Slump-flow [6], U-Box [7], Entrained air [9] and Specific gravity [8]. Cylindrical test specimen 100x200mm had been molded for tests in the hard state - compressive strength and modulus of elasticity - in the ages of 3, 7, and 28 days. Preliminary results shows that it can be possible the use of different additions in the production of great SCC. We detach the little variability of the specific gravity, as well as of the entrained air, that presented low values. For concretes with same compressive strength, the modulus of elasticity shows a variability between 5 and 60%.

• Supplemental Notes:
  • The title of this paper is listed in the Table of Contents on the CD ROM as Influence of Additions in the Mechanical Properties of Self-Compacting Concrete.
• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  National Concrete Bridge Council

  Portland Cement Association, 5420 Old Orchard Road
  Skokie, IL  United States  60077-1083

  Missouri Department of Transportation

  105 West Capitol Avenue
  Jefferson City, MO  United States  65102

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Araujo, Janaina
  • Geyer, Andre
  • Castro, Alexandre
  • Andrade, Moacir
• Conference:
  • 2008 Concrete Bridge Conference
  • Location: St. Louis MO, United States
  • Date: 2008-5-4 to 2008-5-7
• Publication Date: 2008

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: 7p
• Monograph Title: HPC: Safe, Affordable, and Efficient

Subject/Index Terms

• TRT Terms: Air entrained concrete; Compressive strength; Entrained air; Granite; Mechanical properties; Minerals; Mix design; Powders; Self compacting concrete; Silica fume; Specific gravity
• Uncontrolled Terms: Metakaolin
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01105254
• Record Type: Publication
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jul 28 2008 2:08PM