Development of an evaluation protocol to estimate the long-term performance of secondary materials in road construction

Future performance of secondary materials in road construction is often difficult to estimate. In this study, aging is proposed as a means of exploring the long-term mechanical and physical performance of secondary materials. Blast Furnace Slag (BFS) material, routinely used in the Netherlands as a cementitious material was selected as a reference material in this aging approach. A motorway in the Netherlands (the A32 motorway) was used as a source of field aged BFS materials. The base layer of this motorway, suddenly experienced serious failures. Three types of aging treatments were chosen and applied to the cylinders made with the fresh materials and A32 field aged materials. These aging treatments are being normal aging, steam aging and freezing-thawing cycles. The aging methods affected the mechanical and chemical performance of material. Response variables measured in the laboratory and in the field were mostly similar and the acquired results from the laboratory aging methods suggesting that the aging methods produced a material of similar distress. Steam aging produced loss of strength which indicated that steam aging can contribute to the occurrence of deleterious reactions. Microscopic techniques were used to analyze this reaction. The study of response variables showed there is a linkage between compressive strength, expansion, micro cracking and amount and type of binder.

Language

  • English

Media Info

  • Pagination: pp 755-764
  • Monograph Title: Bearing capacity of roads, railways and airfields: proceedings of the ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields: Trondheim, Norway 25-27 June 2013. Vol 1-2

Subject/Index Terms

Filing Info

  • Accession Number: 01596572
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • ISBN: 9788232102853
  • Files: ITRD, VTI
  • Created Date: Apr 21 2016 12:32PM