Simple Method to Identify Marl Soils

An experimental investigation proposed a simple, practical method to identify marl soils in the laboratory and to classify the soils. The percentage of calcium carbonate (CaCO3) of the soil was determined with three methods: (a) thermogravimetric analysis (TGA), (b) sequential loss on ignition (LOI), and (c) chemical reaction following ASTM C25. The sequential LOI test has the advantage that both organic and CaCO3 content of the soil can be determined with a conventional furnace. X-ray diffraction, pH, and Atterberg limits tests were also conducted. The percentage of CaCO3 determined from the sequential LOI tests agreed well with those from the TGA tests and from the chemical tests. No correlation was found between the percentage of CaCO3 and organic content in the soil. As the organic content of the soil increases, the liquid limit increases and the plasticity of the soil increases. As the CaCO3 content of the soil increases, the liquid limit of the soil decreases and the soil becomes less plastic. The geotechnical engineering properties of marl soils depend on organic content and CaCO3 content, and so the soils should be classified according to both organic content and CaCO3 content.

• Record URL:
  https://doi.org/10.3141/2232-08
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Simple+Method+to+Identify+Marl+Soils&author=C.+Jung&author=A.+Bobet&author=N.+Siddiki&publication_year=2011
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Blurbs/166282.aspx
• Authors:
  • Jung, Chulmin
  • Bobet, Antonio
  • Siddiki, Nayyar Zia
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 76-84
• Monograph Title: Geomaterials 2011
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2232
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Atterberg limits; Calcium carbonate; Geotechnical engineering; Laboratory tests; Liquid limits; Marl; Organic content; pH value; Plasticity; Soil mechanics
• Uncontrolled Terms: X-ray diffraction
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01333047
• Record Type: Publication
• ISBN: 9780309167451
• Report/Paper Numbers: 11-0021
• Files: PRP, TRIS, TRB, ATRI
• Created Date: Mar 21 2011 2:13PM