FLY-ASH AND GRANULATED SLAG IN ROAD CONSTRUCTION

LES CENDRES VOLANTES ET LE LAITIER GRANULE ENCONSTRUCTION ROUTIERE

Fly-ash and granulated slag (with a small quantity of lime) are successfully used, especially in France, as binder for stabilized gravel layers. The slow rate of setting of such mixtures has many technical and economic advantages. As laying does not need to be carried out immediately after mixing, the capacity of mixing plants can be markedly increased and the latter can be used more advantageously. Traffic can start moving immediately on the mechanically stable roadbase, thus increasing the state of compaction of the material. No traffic diversion is necessary. Gravel from quarry waste, and crushed and screened slag aggregates make satisfactory aggregates for gravel-fly-ash and gravel-slag roadbases. It is economically profitable to stabilize gravel, high-output fixed plants set up where such material is produced. The completed mixture can be transported by road to neighbouring construction sites, and by rail if it is needed far away. By using transport modes appropriately it is possible to ensure supply for the whole country for road construction and improvement operation, and building and civil engineering work. Mixtures for other uses can be prepared in-situ with smaller mixers easy to install. The technical guidelines for both processes have been prepared. The materials for mechanically stabilized roadbases, which up to now had an equivalence coefficient of 0,5 and 0,7 can be used for gravel-fly-ash or gravel-slag roadbases with an equivalence coefficient of 1,5. /TRRL/

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • GASPAR, L
• Publication Date: 1976-11-12

Language

• French

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 135-143
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 86
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Aggregates; Base course (Pavements); Binders; Calcium oxide; Comminution; Continuously graded aggregates; Delivery service; Economic benefits; Fly ash; Granulated slag; Gravel; Mixing plants; Road construction; Setting (Concrete); Slag; Soil stabilization; Stabilized materials; Time; Transportation careers
• Uncontrolled Terms: Stabilization; Use
• Old TRIS Terms: Granulators
• ITRD Terms: 4577: Aggregate; 4948: Binder; 4598: Continuously graded aggregate; 284: Delivery; 4580: Fly ash; 4560: Granulated slag; 4574: Lime; 3648: Mixing plant; 3688: Roadbase stabilization; 4723: Setting (concrete); 5414: Time; 9084: Use
• Subject Areas: Economics; Geotechnology; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00170365
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analtyic
• Files: ITRD, TRIS
• Created Date: Apr 12 1978 12:00AM