Control of treated subgrades with a new continuous method to assess the modulus

The treatment with hydraulic binders of poor characteristics, cohesive, sometimes wet soils, provides very interesting top layers, the high modulus of which is able to be taken into account in the pavement design. However, it needs to ensure a good quality of treatment on every point of the layer, to guarantee the long term behaviour of the structure. Large improvements in treatment equipments have been observed recently, but some factors like coarse granulometry, or very wet conditions, or insufficient maintenance of equipments, may affect the final quality of the structure. To assess this quality, a new apparatus called the portancemetre, developed in the network of Laboratories of Ponts & Chaussées in France, is able to continuously measure the modulus of the platform when rolling on it. It consists in a vibrating wheel towed by a 4 WD vehicle. Continuous profiles of modulus are recorded, the range of them being between 30 and 300 MPa or more. With this high cadence the apparatus is able to control 15-20 km per a day, and easy to operate on a jobsite. Weak points are systematically detected, allowing to have a complete view about the quality of treatment before continuing the pavement construction.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8489875278
• Authors:
  • Quibel, A
  • Havard, H
  • Bisson, D
• Conference:
  • International Symposium on Subgrade Stabilisation and In Situ Pavement Recycling Using Cement, 1st, 2001, Salamanca, Spain
• Publication Date: 2001-10

Language

• English

Media Info

• Pagination: 8p
• Monograph Title: First International Symposium on Subgrade Stabilisation and In Situ Pavement Recycling Using Cement, Salamanca, Spain, 1-4 October 2001

Subject/Index Terms

• TRT Terms: Binders; Modulus of deformation; Pavement design; Pavements; Subgrade (Pavements); Testing equipment; Tests for suitability, service and quality
• Geographic Terms: France
• ATRI Terms: Binder; Modulus; Pavement design; Pavement testing; Stabilization; Subgrade; Test rig
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 01392468
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 8489875278
• Files: ATRI
• Created Date: Aug 23 2012 7:09AM