TEST ROAD WITH GRAVEL WEARING COURSE AT LINKOEPING 1980

PROVVAEG MED SLITLAGERGRUS VID LINKOEPING 1980

The purpose of the test road was primarily to study the significance of plasticity characteristics of the wearing course with regard to durability, possibilities of using crushed rock-aggregate with a coarser particle size distribution than prescribed by current norms for wearing courses and a number of substitute materials for clay as binder components. Test stretches with low and high plasticity index (ip) were constructed both with norm-compliant composition of the wearing course and also with material which has an excess of sand (sand interference). The substitute materials for clay comprises residual kaolinite, residual gypsum and limestone filler. The results indicate that a gravel wearing course with a high plasticity index gives better durability but requires a dust-binding agent since the surface desiccates rapidly during dry periods, after which dust formation and traffic abrasion of the binder begins. However, a wearing course with low plasticity index and silt as binder showed surprisingly good resistance to desiccation of the surface even without the adding of a dust-binding agent. Rain after a long dry period caused pot-hole formation on stretches with low ip but not on those with high ip. This may be a result from the fact that desiccation occurred to a greater depth in the wearing course on the former test stretches where the wearing course had a more open structure and consequently a lower internal stability. A good result was obtained when using residual kaolinite as substitute material for clay as binder. The worst result was obtained with residual gypsum. Wearing courses with a binder of limestone filler showed mainly fairly good results but the abrasion resistance was poor. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03476030
• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • Lindh, E
• Publication Date: 1983

Language

• Swedish

Media Info

• Features: Figures; Photos; Tables;
• Pagination: 92 p.
• Serial:
  • VTI Topics
  • Issue Number: 313
  • Publisher: Swedish National Road and Transport Research Institute (VTI)
  • ISSN: 0347-6030

Subject/Index Terms

• TRT Terms: Abrasion resistance; Aggregates; Binders; Clay; Coarse aggregates; Crushed rock; Desiccation; Durability; Dust; Experimental roads; Gravel; Gypsum; Kaolinite; Limestone; Plasticity; Plasticity index; Wear; Wearing course (Pavements)
• Uncontrolled Terms: Particle size distribution
• Geographic Terms: Sweden
• Old TRIS Terms: Substitutes
• ITRD Terms: 4577: Aggregate; 4948: Binder; 4559: Coarse aggregate; 4173: Crushed stone; 5910: Durability; 4572: Dust; 2778: Experimental road; 4175: Gypsum; 4189: Kaolinite; 4131: Limestone; 5922: Plasticity; 8109: Sweden; 5293: Wear; 2980: Wearing course
• Subject Areas: Design; Geotechnology; Highways; Hydraulics and Hydrology; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00380054
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Feb 29 1984 12:00AM