Technical Guide - Valorization of local materials
The purpose of this guide is to promote the use in roadengineering of local materials, which are not in general usefor various technical or historic reasons, in order to save somenatural resources and increase recycling to reduce final wasteflows.
In the current guide, it was decided to limit the approach to the most valorizing uses, i.e. capping and base layers.
This guide is part of a series of documents prepared by the CFTR intended to promote the use of materials not currently in general use for various technical and historic reasons in road engineering.
The driving forces behind this approach are:
• the determination to save some natural resources;
• the promotion of the use of local materials;
• the increase in recycling, meeting the need to reduce final waste flows produced by our society.
This guide describes a general study method for these materials (these studies being within the scope of local initiatives).
Contents
Contents..................................................................................................................... 5
Foreword ................................................................................................................... 6Introduction .............................................................................................................. 7
Materials concerned ............................................................................................... 10
Roadway foundations ........................................................................................... 10
"Non-standard" materials .......................................................................................... 10
Materials "outside standard application guide" ........................................................ 12
Capping layers ...................................................................................................... 12
Analysis of status of materials with respect to standard ............................................ 12
Materials outside the scope of GTR - GTS and outside the scope of NF P 94-102-1 14
Analysis of valorization approach ........................................................................ 15
Identification of risk factor ................................................................................... 17
Stages of identification and examples of risk factors. ................................................ 17
Incorporation of heterogeneity of material ................................................................ 17
Risk assessment .................................................................................................... 18
Identification of source and material. ........................................................................ 18
Laboratory study ........................................................................................................ 21
Test site.......................................................................................................................29
Implementation of derogation .............................................................................. 33
Derogation formulation.............................................................................................. 33
Derogation validation ................................................................................................ 33
Glossary of abbreviations ..................................................................................... 34
Appendix 1: Normative and regulatory references............................................. 35
Standard ................................................................................................................ 35
Other regulatory texts ........................................................................................... 37
Appendix 2: Contents of a regional technical guide and validation procedure by the CFTR. ...................................................................................................................... 39
Appendix 3: Examples of the application of a methodical approach for local material valorization ............................................................................................................. 40
