Valorization of sand with high methylen blue value into bituminous mixtures for wearing courses

Most European nations use washed sand to design their bituminous mixtures for wearing course, primarily to prevent excessive water sensitivity of asphalt due to the presence of clays in sand natural fines. The lack of fines is then offset by an addition of limestone filler. These practices lead to high water and energy consumption. France, Belgium and Denmark are exceptions: they use quarry sands with their natural fines, without washing, but after checking the harmfulness of fines (clay content) according to French specifications described in the XP P 18-545 standard section 8, a maximum methylene blue value of 2 g/kg is permitted. In order to save natural resources and improve the valorization of unwashed quarry sands, investigations have been carried out since 2007 on two quarry sands with methylene blue values in the range of 2 to 4 g/kg to study the behavior of bituminous mixtures for wearing course incorporating these unwashed sands. These two sands coming from eruptive quarries of Burgundy (rhyodacite and rhyolite) were hence characterized by numerous tests, including cationic exchange capacity (CEC) measurements and mineralogical analysis by X-ray diffraction, showing the presence of illitemuscovite and montmorillonite. These sands were subsequently tested in the laboratory to design asphalt wearing course (0/10 Asphalt Concrete). Finally, these mixes were laid respectively in 2007 and 2009 on two experimental sites located on the French secondary road network. After 1 and 3 years of monitoring, no abnormal behavior induced by the presence of clay could be observed. This initial assessment allows the authors to consider valorizing these materials, particularly through the development of a regional technical manual regarding the sands of these two studied quarries, then by the writing of a user regional guide.

• Availability:
  • Find a library where document is available. Order URL: http://www.piarc.org/en/order-library/13949-en-Proceedings%20of%20the%20XXIVth%20World%20Road%20Congress,%20Mexico%20-%202011.htm
• Supplemental Notes:
  • Abstract reprinted with permission of the World Road Association – PIARC.
• Corporate Authors:

  World Road Association (PIARC)

  La Grande Arche, Paroi Nord, Niveau 5
  F-92055 La Defense Cedex,   France 
• Authors:
  • Coulon, N
  • Yazoghli-Marzouk, O
  • Badrouillet, C
  • Descantes, Y
  • Hammoum, F
  • Duc, M
  • Dupont, P
  • Sainte, P
  • Dey, P
  • Afchain, B
  • Boyer, N
• Conference:
  • 24th World Road Congress
  • Location: Mexico City , Mexico
  • Date: 2011-9-26 to 2011-9-30
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 17p
• Monograph Title: 24th World Road Congress Proceedings: Roads for a Better Life: Mobility, Sustainability and Development

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bituminous mixtures; Quarries; Sand; Valuation; Wearing course (Pavements)
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01523543
• Record Type: Publication
• ISBN: 2840602679
• Files: TRIS
• Created Date: Apr 28 2014 10:52AM