The Georgia Department of Natural Resources, evaluated samples from a clay resource located in Clay County, Ga., for use as a raw material for lightweight aggregate. The physical properties of clay samples, taken from 5-foot increments of drill cores from 11 holes, were determined. Raw materials were plasticized and extruded to produce 1/2-inch by 1-inch pieces and fired in a rotary kiln to produce lightweight aggregate samples. The resulting expanded material had excellent loose pour weights ranging from 30 to 37 lb/cu ft. The expanded test materials were crushed, sized, and used as aggregate to form concrete cylinders. The unit weight and compressive strength of the cylinders averaged 106 lb/cu ft and 3,350 lb/sq in, respectively; these values meet American Society for Testing and Materials specifications for structural concrete. The clay from the drill cores was also used to make test bars that were evaluated for building brick.

  • Supplemental Notes:
    • Prepared in cooperation with Alabama Univ., University.
  • Corporate Authors:

    Bureau of Mines

    Tuscaloosa Metallurgy Research Center
    University, AL  United States 
  • Authors:
    • Liles, K J
    • Heystek, H
  • Publication Date: 1980

Media Info

  • Pagination: 34 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00326540
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: BUMINES-RI-8421
  • Files: TRIS
  • Created Date: Feb 18 1981 12:00AM