Grave mousse - Combining reliability and durability

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In pavement construction and maintenance, stabilised gravel is often used in upper and lower
base courses. The mix has the intrinsic properties of the binder (hot or cold, bituminous or
hydraulic) used to coat the aggregates.
To ensure durability, the mechanical performance of the material must be sufficient to provide
proper structural support and prevent cracking. Building on its innovation capabilities, Eurovia
has designed a product that meets these requirements and even more.

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Grave mousse - Combining reliability and durability

  1. 1. GRAVEL STABILISED WITH FOAMED BITUMEN GRAVE MOUSSE Combining reliability and durability
  2. 2. key benefits Low heat sensitivity Very good rutting resistance Excellent workability Enhanced environmental protection Proven qualities and durability key figures In pavement construction and maintenance, stabilised gravel is often used in upper and lower base courses. The mix has the intrinsic properties of the binder (hot or cold, bituminous or hydraulic) used to coat the aggregates. To ensure durability, the mechanical performance of the material must be sufficient to provide proper structural support and prevent cracking. Building on its innovation capabilities, Eurovia has designed a product that meets these requirements and even more. GRAVE MOUSSE GRAVEL STABILISED WITH FOAMED BITUMEN Grave mousse was tested under the Road Innovation Charter and certified in September 2003 Tested on the LCPC fatigue test facility in Nantes, Grave mousse withstood the equivalent of 15 years of T1 traffic (500 trucks/day)
  3. 3. combination of AdVANTAGES Grave mousse meets the pavement rehabilitation requirements of a wide variety of project managers seeking simple, efficient and cost-effective techniques for reinforcing, overlaying, re-profiling and recalibrating pavements. It is also used in new pavement upper and lower base courses. Eurovia’s Grave Mousse combines numerous advantages: rapidly re-trafficked, as soon as the surface sealing has been applied, without prior curing. The application of the final surface course is scheduled at least a week later. workable: makes highly flexible work scheduling possible. storable and usable for several days following production: with the appropriate aggregates, Grave mousse can be stored for a month or more; only stirring and water content adjustment are then needed to restore optimum laying conditions. environmentally-friendly due to its potential for incorporating Reclaimed Asphalt Pavement (RAP) and above all its cold production and laying conditions. easy application The foam is produced by special equipment mounted on a platform holding all the dosing and monitoring tools. It is then sprayed on the materials to be treated. Lime is included in the mix to render the gravel hydrophobic and in some cases an adhesion agent is also added. The platform, designed by Eurovia, is very compact and mobile. It can be transported by a single tractor-trailer and easily adapted to any type of cold mixing plant. A tack coat must be spread before Grave mousse is laid and a seal coat is then applied pending application of the final surface course. an INNOVAtive HIGH-PERFORMANCE MATERIAL
  4. 4. Grave mousse is a 0/10 to 0/20 mm graded base course material made by coating unheated aggregate with foamed hot bitumen. Foamed bitumen is made by injecting a very small quantity of water containing a foaming agent into a selected hot bitumen. The water evaporates instantly, generating a foam that is immediately mixed with a blended or unblended aggregate at a bitumen dosing of between 3.3 and 4%. In reinforcement and new construction, Grave Mousse is applied in a thickness of 70 to 150 mm. Thinner layers are applied for purposes of pavement reprofiling and reshaping. Grave Mousse is also used in the Tricouche pavement structure, in which it can form the core of the composite structure. Excellent results were obtained with sub-normal and recycled materials such as crushed alluvial aggregates, RAP and recycled cement concrete. The same is true of incinerator bottom ashes. Grave Mousse offers low heat sensitivity and excellent rutting resistance. All materials routinely employed in base courses can be used to produce Grave Mousse, subject to a prior laboratory study. PROven EFFectiveness Rutting resistance Rutting depth measured according to the EN 12697-22 standard at 60°C and 30,000 cycles 2 % Rutting depth measured after 4.3 million 13-tonne equivalent axle passes 12 mm The latter result was measured at the LCPC fatigue test facility in Nantes on a 100 mm layer of Grave mousse overlaid with a microsurfacing. TECHNICAL DEPARTMENT 18, place de l’Europe - 92565 Rueil-Malmaison cedex Tel. : 33 (0)1 47 16 38 00 - Fax : 33 (0)1 47 16 38 01 www.eurovia.com technique@eurovia.com -February2014-photoscredit:photolibraryEurovia

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