INFLUENCE OF CLAY MINERALS AND IRON OXIDES ON SELECTED PROPERTIES OF TWO LATERITIC SOILS

Mineralogical studies of two representative samples of lateritic red soil-one from Calicut-Kerala, and the other from Rajahmundry-Andhra Pradesh, revealed varying proportions of halloysite, kaolinite, goethite, gibbsite, quartz and colloidal iron oxide. Chemical removal of free iron oxide resulted in important changes in soil properties. X-ray peaks of clay minerals became sharper, the clay size fraction increased and the skempton activity decreased in the soils free of iron oxides. The cation exchange capacity (cec) was found to decrease in the more acidic, halloysite rich calicut soil whereas the cec of the Rajahmundry soil showed a significant increase simultaneously with increase in clay content after iron removal. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00468983
• Corporate Authors:

  Indian Geotechnical Society

  Bahadur Shah Zafar Marg
  New Delhi 110001,   India 
• Authors:
  • SESHAGIRI RAO, K
  • Raymahashay, B C
• Publication Date: 1981-7

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 255-266
• Serial:
  • Indian Geotechnical Journal
  • Volume: 11
  • Issue Number: 3
  • Publisher: Indian Geotechnical Society
  • ISSN: 0046-8983

Subject/Index Terms

• TRT Terms: Cation exchange; Chemical analysis; Clay; Clay minerals; Iron; Iron oxides; Kaolinite; Laterites; Lateritic soils; pH value; Plasticity; Properties of materials; Quartz; Samples; Sand; Silts; Soils
• Uncontrolled Terms: Particle size distribution; Soil properties
• Geographic Terms: India
• ITRD Terms: 7163: Chemical analysis; 4177: Clay; 8045: India; 7159: Iron; 4189: Kaolinite; 4138: Laterite; 6200: Particle size distribution; 7116: pH value; 5922: Plasticity; 4123: Quartz; 6251: Sample (mater); 4105: Sand; 4149: Silt; 4156: Soil
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00387473
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Aug 30 1984 12:00AM