PETROGRAPHIC STUDIES, AREA DISTRIBUTION, AND TECHNICAL QUALITIES OF TUFAS USED AS AGGREGATES IN THE PROVINCE OF BUENOS AIRES

In this paper the geological and economic background information on tufa is analyzed, especially as regards its distribution and characteristics in the province of Buenos Aires. The frequent use of tufa as a material for highway construction is a cause of concern to geologists and engineers, who are conducting studies to define these calcareous materials on the basis of their geological and technological characteristics. The first chapter describes the tufa deposits and their distribution. A map on a scale of 1:2,000,000 is appended. The petrography of this sedimentary rock is studied in another chapter, considering the structural and textural characteristics, with accompanying microphotographs and drawings. The mineralogy and chemical composition of the tufas is discussed breifely, and to the afore-mentioned map are added the figures showing the average calcium carbonate content in the respective areas. In the chapter on technical qualities of the materials, samples are described on the basis of tests on absorption, specific gravity, "Los Angeles" abrasion, and permeability. Graphs are appended which show the ratio of calcium carbonate content to absorption, specific gravity to absorption, Los Angeles abrasion to texture, permeability to calcium carbonate content, and permeability to absorption. The conclusions reached from these studies are of a petrographic and technological nature. /Author/

  • Supplemental Notes:
    • Ninth Pan American Highway Congress, May 6-18, 1963.
  • Corporate Authors:

    Organization of American States

    17th and Constitution Avenue, NW
    Washington, DC  United States  20006
  • Authors:
    • Kilmurray, J O
  • Conference:
  • Publication Date: 1963-5

Media Info

  • Features: Figures; References;
  • Pagination: p. 790-803
  • Serial:
    • Issue Number: 142

Subject/Index Terms

Filing Info

  • Accession Number: 00263383
  • Record Type: Publication
  • Report/Paper Numbers: Chapter VI, Topic 8
  • Files: TRIS
  • Created Date: Dec 13 1974 12:00AM