The document discusses the recycling of household waste bottom ash into road construction materials, specifically the scorvia® product range produced by Eurovia in France. Annually, over 800,000 tonnes of this ash are transformed into eco-friendly materials used for various road applications, supported by reliable industrial techniques. Stringent classification and application guidelines ensure environmentally responsible use of these materials in road construction.

1. ROAD CONSTRUCTION MATERIALS MADE FROM
HOUSEHOLD WASTE BOTTOM ASH
SCORviA
®
Objective: recycling

2. SCORviA®
ROAD CONSTRUCTION MATERIALS MADE FROM
HOUSEHOLD WASTE BOTTOM ASH
In France, each person generates nearly 400 kg of household waste per year. This adds up to 26 million tonnes
for the country as a whole, of which 11.8 million tonnes are incinerated. Since July 2002, this waste can no longer
be landfilled directly. Instead it must undergo treatment to recover the recyclable fraction and then be stored in a
controlled landfill.
Incineration can reduce the volume of this waste by a factor of 10 and its weight by a factor of 4. Incineration
produces a granular residue called household waste bottom ash. More than 3 million tonnes of bottom ash are
produced annually. Eurovia uses it to produce 800,000 tonnes of materials for road construction – its Scorvia®
product range – in some 20 maturation and processing facilities.
k
ey benefits
E
nvironmental protection
H
ousehold waste bottom ash recycling
k
ey figures
800 000 tonnes
de matériaux valorisés par an
A
range of cost-effective materials
R
eliable, high-quality recycled road
materials
Some 20
recycling facilities in France
The Scorvia® range:
6 processes
with various applications
Eurovia,
European leader
in re-use and recycling

3. a
new source of
RECYCLED MATERIALS
Household waste bottom ashes produced by
the maturation and processing facilities are
characterized by an environmental classification
according to the results of the study on the leaching
behavior and evaluation of the intrinsic content
of pollutant elements defined by decree of 18th
November 2011.
Three categories of household waste bottom
ashes are defined:
ousehold waste bottom ashes V2 for use on
h
jobsites for road service type 1 and 2
ousehold waste bottom ashes V1 for use on
h
jobsites for road service only type 1
ousehold waste bottom ashes S have to be sent
h
to a storage facility for non-dangerous wastes.
use limits due
to immediat
environment of
the structure
The use of household waste bottom ashes is
prohibited:
in floodplains and less than 50cm from the highest
known water levels,
less than 30m from watercourses, including ponds
and lakes,
in protection areas of drinking water abstraction,
in areas registered as presenting a particular
sensitivity regarding aquatic environment,
in national parks,
in areas where karst is rising the surface.
f
or smart
road
The road services type 1 describe the structures
presenting a road surface layer (mastic asphalt,
surface dressing, cement concrete or joined
cobblestones).
Eurovia has developed a reliable industrial technique
to give to household waste bottom ashes the
geotechnical and environmental characteristics that
are required to be used in road construction.
The road services type 2 describe the structures
covered with at least 30cm of natural materials or
equivalent.
This process comprises several stages of sieving,
crushing, unscrapping, non-ferrous metal removal
and separation off light unburned particles. These
operations, including a maturation period, happen
on constructed fabilities. Eurovia specializes in the
construction and management of such facilities.
The household waste bottom ashes V2 or V1 do not
have to be used for carrying out drainage systems
and for carrying out preloading works.
These household waste bottom ashes V1 and
V2 can be used as it is, in the form of unbound
aggregate, or after mix design with other
aggregates or treatment with hydraulic binder
or bitumen. It is used in materials with broad
applications: the Scorvia® product range.

4. A
BROAD RANGE
of RELIABLE,
HIGH-PERFORMANCE
APPLICATIONS
Scorsable® can be used in sub-base (in which it is
similar to a Class 3 or 4 material defined by the Sétra/
LCPC “Backfill and Sub-base” Technical Guide) and in
pavement lower base courses (Class T2 or T3 treated
sand).
The Scorvia® product range, made from various
recycled household waste bottom ash materials,
can be used in a wide variety of applications.
It offers environmentally friendly, simple and
effective solutions.
cormousse®
S
Scormousse® is produced by applying the
foamed bitumen aggregate treatment method to
bottom ash from household waste incineration.
Scormousse® is suitable for construction of new
pavement base courses or for reinforcement of
flexible pavements with moderate traffic loadings.
The solution is manufactured by the same
process as Grave mousse®. Layer thicknesses are
determined by applying conventional structural
design methods.
corcim®
S
Scorcim® is a road material made from household
waste bottom ash treated with hydraulic binder
to give it the mechanical properties required for
use in sub-base and lower base courses. The
benefits of Scorcim® are three-fold: it contributes
to sustainable development, provides a reliable,
high-performance alternative material and fosters
a cost-effective approach.
corsable®
S
Thanks to its grading and its high PSV properties,
Scorsable® is an excellent material with the
grading correction needed to obtain sufficient
stability and highly satisfactory ultimate
mechanical strength.
corcan®
S
Scorcan® is a bottom ash concrete for use as a
trench backfill, made with recycled household
waste bottom ash. Scorcan® is an Autocan® variant
and has that product’s hydraulic and mechanical
properties. Thixotropic and fluid during laying, it
provides pipe bedding, continuous and uniform
pipe coating and trench backfill with excellent
adhesion to trench walls. Scorcan® is self-placing
and incompressible. It required no compaction,
which is often difficult to carry out in trenches.
corive®
S
Scorive® is a self-compacting concrete made from
household waste bottom ash and used to build
haunches in pavement widening operations. Its
mechanical properties made this material suitable
for road construction, especially in cases where
conventional techniques are difficult to apply. Its
stiffness is lower than that of a cement treated
base material and this reduces the risk of cracking
and appearance of a longitudinal crack along the
widened area.
Scorvia®, Scorsable®, Scormousse®, Scorive®, Scorgrave®
and Scorcim® are registered trademarks.
Scorcim® was selected by the Direction des Routes highway
department as part of the Road Innovation Charter.
A certificate was issued in 2005.
Scorive® and Scormousse® were selected as part of the Eure
et Loir department’s Road Innovation Charter and obtained
their certificates in 2005
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
- June 2013 - photos credit : photolibrary Eurovia
corgrave®
S
With a regular grading curve, good immediate
stability and progressive hardening, Scorgrave®
is a potential substitute for as-dug and unbound
materials. This solution can be used for compacted
backfill with a maximum height of 6m or in road
structures: capping layer or road base course for
low-traffic roads.