COMPACTION AND BEHAVIOUR OF EMBANKMENTS BUILT WITH EOCENE MARK ROCK AT NAVARRA

The geotechnical characteristics and compaction method used for construction of Navarra highway embankments in Spain, and also its behaviour after placement are described. The material was obtained from the cuts excavated in Eocene blue marls. This rock, of aeolian origin, has approximately 45% of calcium carbonate and the compression strength of the sound rock varies between 100 and 200 kf/sq cm. Blasting was necessary for its excavation. The atterberg limits of the marl are 16 and 35. Mineralogical analysis of the sound marl gave calcite, quartz, mica of illitic-muscovitic type, chlorite and small quantities of kaolin. Due to rock weathering chlorite transforms by hydration into vermiculite yielding to rock fracture by a stress increment due to volume increase. During embankment construction, compaction was performed with impact-compactor cat-825, employing 10 passes at a speed of 7 km per hour. By these means, 90% of the maximum density (modified Proctor test) was attained, with water contents between the optimum and two points below. The deformation modulus obtained from load plate tests varied between 300 and 550 kg/sq cm. The behaviour of these embankments has been satisfactory after two years of road traffic. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727700693
• Supplemental Notes:
  • Clay Fills. Proceedings of the Conference Held at the Institution of Civil Engineers, 14-15 November 1978.
• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • Cedrun, G
  • Simic, D
• Conference:
  • Institution of Civil Engineers, Proceedings
• Publication Date: 1979

Media Info

• Features: Figures; Tables;
• Pagination: p. 57-61

Subject/Index Terms

• TRT Terms: Atterberg limits; Calcium carbonate; Clay; Compaction; Compressive strength; Conferences; Density; Embankments; Geotechnical engineering; Marl; Mineralogy; Minerals; Road construction; Weathering
• Geographic Terms: Spain
• ITRD Terms: 4177: Clay; 3686: Compaction; 8525: Conference; 5908: Density; 2801: Embankment; 4119: Marl; 4051: Mineral; 8105: Spain; 5281: Weathering
• Subject Areas: Construction; Geotechnology; Highways; I51: Earthworks and Soil Drainage;

Filing Info

• Accession Number: 00311722
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-7277-0069-3
• Report/Paper Numbers: Proceeding
• Files: ITRD, TRIS
• Created Date: Nov 19 1980 12:00AM