FOAMED ASPHALT STABILIZATION: NOT ONLY FOR LOW-VOLUME ROADS

STABILISATION AU MOYEN DE LA MOUSSE DE BITUME: ELLE NE S'APPLIQUE PAS SUELEMENT AUX ROUTES A FAIBLE VOLUME DE CIRCULATION

Since 1989, Soter has been using the foamed asphalt technology for road recycling. Throughout the years and with the acquired experience, Soter has been able to demonstrate that it is possible to widen the range of acceptable materials for the foamed asphalt stabilization technique. At first, this technique was reserved for low volume roads having a reasonably good structure and non-plastic fines in the granular base. However, laboratory studies as well as field demonstrations have shown that it is possible to successfully foam stabilize plastic materials with as high as 18% passing the no. 200 sieve. It was also shown that it is possible to achieve structural resistance equal to any type of hot mixed material. The way to do this is by using hydrated lime in one case and Portland cement in the other, always with the use of foamed asphalt. The use of hydrated lime with plastic materials has an appreciable effect on the fines. The chemical reaction involved between the lime and the moisture in the fines completely neutralizes the negative performance of plastic materials in road structures. On the other hand, the Portland cement, when hydrated by the water content in the fines, creates a strong matrix while the foamed asphalt assures flexibility in the mixture. Since foamed asphalt contains no water, the cement or lime is not prematurely hydrated as it will be with emulsions. In this case, only the curing time is improved. Soter has used up to 3% of Portland cement by weight of aggregates along with foamed asphalt and still maintained a flexible mix with impressive compression strengths and structural bearing.

• Corporate Authors:

  Bibliotheque Nationale du Quebec

  125 rue Sherbrooke ouest
  Montreal H2X 1X4,   Canada 
• Authors:
  • Hotte, P
  • Theriault, Y
• Conference:
  • Proceedings of the 1997 Conference of the Northeast Association of State transportation Officials
  • Location: Quebec, Canada
  • Date: 1997-6-7 to 1997-6-11
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures;
• Pagination: p. 113-125

Subject/Index Terms

• TRT Terms: Calcium hydroxide; Foamed asphalt; Low volume roads; Pavements; Plastics; Recycling; Soil stabilization
• Uncontrolled Terms: Stabilization
• Old TRIS Terms: Recycled pavements
• Subject Areas: Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00753477
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 2 1998 12:00AM