MECHANICALLY STABILISED ROADBASES OF CONTINUOUSLY GRADED AGGREGATES - AN ECONOMIC BUILDING METHOD

MECHANISCH STABILISIERTE TRAGSCHICHTEN AUS KORNGESTUFTEN GESTEINSGEMISCHEN - EINE WIRTSCHAFTLICHE BAUWEISE

The use of cheap broken natural stones for roadbase construction can reduce the cost of road building. Because of compression stress and shear the use of this material affords an extraordinarily good resistance to subsidance due to its roughness. Before being laid, the aggregate mixture must produce an equal distribution of compounds. It should be laid in a layer and should be mixed in gradual stages with a proportionate quantity of water. Normally a roadbase thickness of 20 cms proves most successful from the point of view of economic efficiency and guarantees maximum performance from the equipment used in mixing and laying. When a non mechanically bound stabilised roadbase of 20 cm is in use with a constant overall construction thickness of 60 cm, only bituminous roadbases and frost blankets are modified in accordance with anticipated traffic stress. In the case of hydraulically bound roadbases (20cm) the frost blanket can as a rule be omitted. In this instance only the thickness of the bituminous roadbase is altered, and it can be reinforced in the case of increased traffic stress. A comparison of the costs of equivalent roadbase constructions also shows a preference for the mechanically stabilised roadbase made from broken stone material. In the Vienna area a saving in costs of 3-4% is expected as a result of changing from previous standard construction methods. /TRRL/

• Corporate Authors:

  Road Research Soc of Austrian Assn of Engs & Arch

  Eschenbachgasse 9
  A1010 Vienna,   Austria 
• Authors:
  • Jeschke, J
• Publication Date: 0

Language

• German

Media Info

• Features: References; Tables;
• Pagination: p. 37-40

Subject/Index Terms

• TRT Terms: Aggregates; Base course (Pavements); Bituminous bases; Compressive strength; Construction; Continuously graded aggregates; Costs; Economic efficiency; Economic factors; Frost protection; Insulation blankets; Pavement design; Settlement (Structures); Soil stabilization; Stabilized materials; Stone; Subsidence (Geology); Thickness; Traffic loads
• Uncontrolled Terms: Construction costs
• Old TRIS Terms: Bases; Continuous grading
• ITRD Terms: 4598: Continuously graded aggregate; 237: Economic efficiency; 3055: Pavement design; 2961: Roadbase; 3688: Roadbase stabilization
• Subject Areas: Construction; Design; Economics; Finance; Freight Transportation; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I36: Aggregates;

Filing Info

• Accession Number: 00159800
• Record Type: Publication
• Source Agency: Bundesanstalt für Straßenwesen (BASt)
• Report/Paper Numbers: Report No. 64 Analytic
• Files: ITRD, TRIS
• Created Date: Apr 12 1978 12:00AM