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Every engineering structure and especially every bridge faces unavoidable constraints among those a limited weight admissible on the bridge deck which has to be respected during its lifetime. This constraint is then translated by a limited road thickness (without waterproofing) defined by the design of the structure since its conception. Depending on pathologies found during the life time of the structure (flow, excessive constraints…), the operator can also be asked to search for limits of overloads including maintenance works of the road.
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An argument that carries weight!
ViAponT ®
Lightened asphaLt concrete
Viapont an argument that carries weight!
Every engineering structure and especially every bridge faces unavoidable constraints among
those a limited weight admissible on the bridge deck which has to be respected during its
lifetime. This constraint is then translated by a limited road thickness (without waterproofing)
defined by the design of the structure since its conception. Depending on pathologies found
during the life time of the structure (flow, excessive constraints…), the operator can also be
asked to search for limits of overloads including maintenance works of the road.
The innovation capacity of Eurovia allowed to elaborate a new asphalt concrete which
guarantees a gain of weight up to 40% compared to a conventional asphalt concrete, while
keeping comparable mechanical performances; this new type of asphalt concrete is called
Viapont®.
key benefits
a considerable gain of weight
a gain of time for maintenance operations
reduced inconvenience for users as a short period of realization
a production possible with Tempera® processes
key figures
115 to 230 tons of asphalt concrete economized for the maintenance of an engineering
structure with 2x3 lanes
A product patented in 2013
A weight up to 40% lower thanfor a conventional asphalt concrete
eVerything in Lightness...
Its modulus, between 6.000 and 9.000MPa, allows to satisfy an application as a special process on bridges.
Viapont® is produced in a mixing plant and applied by conventional road means with high rate. All Eurovia divisions have these equipments which allow to consider the Viapont® solution on the whole territory.
The first tests carried out showed that the behavior of Viapont® is similar to the one of a conventional road base asphalt and the aspect is similar.
The laying thickness will be the one of a road base asphalt, to be determined depending on the traffic expected on the bridge. The compaction, as carried out on a bridge, will be without vibration.
To minimize the weight of the asphalt concrete, the research had been orientated to the selection of light aggregates.
A conventional bitumen is sufficient to obtain good characteristics. The adding of an anti-stripping agent and a high binder content arise from the nature itself of the basic aggregates of the formula.
Viapont® shows a rutting resistance comparable to the conventional asphalt concretes with 5.2% determined for 10,000 cycles (NF EN 12697-22). The used 35/50 bitumen allows to achieve the required specifications for a road base asphalt 0/14 class 2 up to the level 2 of the mix design (NF EN 13108-1).
Technical DeparTmenT
18, place de l’europe - 92565 rueil-malmaison cedex
Tél. : 33 (0)1 47 16 38 00 - Fax : 33 (0)1 47 16 38 01
www.eurovia.com
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During the construction of a bridge, the planned
maintenance works can be taken into account and the
structure designed as a consequence. The problem of
possible overload arises more particularly for those
already in operation. Viapont® is then naturally rather
designated to the maintenance works on engineering
structures than to new works.
The patented Viapont® technique offers a wider latitude in order to answer to the problems of several clients whose concern is to present a simple, efficient and economical technical solution regarding the roads while avoiding the overload of engineering structures. The "lightness" of the asphalt concrete authorizes a more important application thickness that allows to adapt to a current level of the road present on the bridge.
The refurbishment works on the bridges can be considerably reduced by the use of Viapont®.The realization fastness and a jobsite area less important also allow to limit the inconvenience occasioned for the user and then to limit the exploitation loss. This finally represents a non-negligible gain of time and means, consequently a substantial economy.
Viapont® will be also favored when its low weight will prove itself as a key benefit, for example to carry out the asphalt concretes of car parks built on roofs or on car parks intermediary floors
Necessary planing
TACRoad base asphalt
11cm
4cm
maintenance of a bridge without Viapont®
Necessary planing
Viapont
16cm
4cm
TACRoad base asphalt
maintenance of a bridge with Viapont®
...optimized works
By substituting a layer of 11cm of conventional asphalt concrete for 16cm of the light asphalt concrete Viapont®, the works regarding the upgrade of the corresponding equipment and of the road downward and in front of the bridge are highly reduced: neither a necessity of upgrade of the equipments such as security barriers on the edges of the bridge, nor a need of complete planing of the existing road on the bridge and this on a length of 50 to 100 meters on both sides of the resurfacing works.
Viapont® is subject to a patent.Viapont® and Tempera® are registered trademarks.
Laying of 16cm Viapont® and a 4cm TAC for a 20cm thick existing road
