2. Recycling white materials
All "white" road materials, i.e. untreated gravel, gravel and sand treated (with cement, hydraulic road binder, slag, etc.) and cement concrete, can be recycled in the form of aggregates.
2.1 Preparation and characterization
Recycling untreated gravel (GNT) in a plant is extremely rare, as in-place recycling is much more economical.
Gravel or sand treated with hydraulic binders is relatively uncommon. The material can be removed in one of two ways: either by fracturing, i.e. reclaiming the slabs with a loader or shovel, followed by crushing, or by milling. Both crushing and milling produce large quantities of fines with these materials. Crushing produces a very hollow O/D, which is crested at 14,...
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Recycling white materials
Conclusion
Bibliography
References
Standards
- Bituminous mixes – Test method for hot hydrocarbon mixes – Part 1: soluble binder content - NF EN 12697-1 -
- Bituminous mixes – Test method for hot hydrocarbon mixes – Part 2: granulometry - NE EN 12697-2 -
- Bituminous mixes – Test method for hot hydrocarbon mixes – Part 5: Maximum mass (true density) of bituminous materials - NF EN 12697-5 -
- Bituminous mixes – Test method for hot hydrocarbon mixes – Part...
Organizations
• World Road Association (PIARC) La Grande Arche 92055 La Défense cedex – http://www.piar.org
• Center d'information sur le ciment et ses applications (CIMBETON) 7, place de la Défense 92974 Paris-la-Défense cedex – http://www.infociments.fr
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