FLY ASH IN CEMENTBOUND SAND FOR ROADBASE. ACCELERATED TESTING IN ROAD TESTING MACHINE

Full scale testing of a reference pavement and a test pavement was carried out using the Danish road testing machine to compare the lifetime of the pavements. The reference pavement was a traditional structure consisting of asphalt, gravel base and sand subbase. The test pavement had a base of fly ash/cement/lime stabilized sand. The pavements were built on a typical Danish clay subgrade. Traffic loading was simulated by dual wheel passages under varying climatic conditions including freeze/thaw periods. The pavements were instrumented with strain gauges, linear variable differential transformers, and pressure cells of the diaphragm type. Functional deterioration was determined by calculation of a serviceability index from measurements of roughness, whereas structural deterioration was established by measurements with the falling weight deflectometer. Comparison was made between measured and calculated strains and stresses, as well as between observed functional and structural design lives and predictions based on Danish design criteria. In the first freeze/thaw period the stabilized sand basecourse cracked. During the test there was no indication of cracking in the asphalt layer. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8788728080
• Corporate Authors:

  Statens Vejlaboratorium

  Elisagaardsvej 5, Postbox 235
  Roskilde,   Denmark 
• Authors:
  • Busch, C
• Publication Date: 1986

Language

• Undetermined

Media Info

• Features: References;
• Pagination: 35 p.
• Serial:
  • Publication of: Statens Veglaboratorium Notat
  • Issue Number: 59
  • Publisher: Statens Vejlaboratorium
  • ISSN: 0106-312X

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bearing capacity; Bitumen; Clay; Cracking; Deflectographs; Deformation; Deterioration; Durability; Elasticity (Mechanics); Experimental roads; Flexible pavements; Fly ash; Gravel; Pavement design; Rigid pavements; Rutting; Sand; Smoothness; Soil stabilization; Stabilized materials; Stresses; Transducers
• Geographic Terms: Denmark
• ITRD Terms: 2990: Basecourse; 3085: Bearing capacity; 4963: Bitumen; 4177: Clay; 5211: Cracking; 6187: Deflectograph; 5595: Deformation; 8028: Denmark; 5255: Deterioration; 5910: Durability; 5912: Elasticity; 3071: Evenness; 2778: Experimental road; 2944: Flexible pavement; 4580: Fly ash; 4575: Gravel; 3055: Pavement design; 2961: Roadbase; 3688: Roadbase stabilization; 3081: Rutting (wheel); 4105: Sand; 2953: Semi rigid pavement; 5575: Stress (in material); 6140: Transducer
• Subject Areas: Geotechnology; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00492932
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 87-88728-08-0
• Files: ITRD, TRIS
• Created Date: May 31 1990 12:00AM