FOXCRETE - KORA

AVEBE BUILDING
AVEBE-weg 1
9607 PT Foxhol
The Netherlands
t +31(0)598 66 20 36
f +31(0)598 66 29 17
e buildinginfo@avebe.nl
BUILDING.AVEBE.COM
FOXCRETE

FOXCRETE
A proven concept
Foxcrete was developed at the INSA Institute in France in 1998. The first trials
were performed by a number of French concrete companies. One of them is
now using Foxcrete in sixty of its concrete plants, producing low-viscosity
concrete almost every day. This company is currently the market leader in
self-compacting concrete in its area in France. Its sales of low-viscosity
concrete are growing rapidly.
Saving money with low-viscosity self-compacting concrete
The total costs of applying one ton of concrete are high. Besides the costs of the concrete
itself, there are significant costs for the mould, the placement, and the repair of defects. Both
the concrete industry and the building industry recognize that low-viscosity concrete can
significantly reduce the costs of placement and repair.
Many pre-cast concrete companies and building companies all over the world have gained
experience with self-compacting concrete in the past few years. Besides the cost reduction,
they also appreciate self-compacting concrete because of the very smooth surfaces that can
be obtained. A further benefit is the reduction of noise and hard labour in the placement of
the concrete. The major drawback of traditional self-compacting concrete is the lack of
robustness of the mixtures, and the properties of almost every batch need to be checked.
The unique role of Foxcrete in self-compacting concrete
To make the mixture more robust, chemicals have to be added. These chemicals stabilize the
formulation and prevent segregation and bleeding. Most of them are called ‘viscositymodifying
agents’ and their function is to increase the plastic viscosity of the concrete. The
effect is a stable, but more viscous concrete.
Foxcrete is not a viscosity-modifying agent. Foxcrete stabilizes the concrete without having a
strong influence on the plastic viscosity. The low-viscosity properties of the concrete are
preserved. When used for floors, for example, Foxcrete provides a free-flowing concrete that
yields very high values for the level nature of the final floor.
Formulations with Foxcrete are very robust. A variation of water content up to twenty litres
per cubic metre has hardly any influence on the stability of the concrete. Frequent users of
Foxcrete have developed one standard mix that is used for each and every batch of selfcompacting
concrete.
Foxcrete is also used in other environments where stability is required, such as applications
to stabilize light-weight concrete (improvement of pumpability), the stabilization of floor
screeds, and the prevention of bleeding of concrete.
Foxcrete formulations
Foxcrete can be applied in conjunction with all types of superplasticizers, lignosulphonates, naphtalenesuphonates,
and polycarboxylates. Very good results have been obtained with the combination of a polycarboxylate
superplasticizer and Foxcrete. An example of a typical Foxcrete formulation is:
Cement Cem I 52.5
280
Fly ash S.G. 2.4
120 - 140
Sand River Sand 0-4 mm
900 - 1000
Gravel River gravel 4 - 16 mm 800
Total water
180 - 210
Super-plasticizer Polycarboxylate type
3 - 5
Foxcrete S20
Form
Application
Packaging
Description Kg/m3
Typical parameters measured with this kind of mix are:
Parameter
Flow (flow table)
Rate of bleeding
Segregation (40cm column, difference in
gravel content between top and bottom)
Availability
Foxcrete is available in 3 forms:
Foxcrete S100 Foxcrete S100F Foxcrete S20
Flake Fine powder
Basic product for
production of solutions
Value
700 - 780 mm
0%
< 5%
For use in dry mortars
and dry mixes
Pallet with 40 bags of 20kg Pallet with 40 bags of 25 kg
2.5
Of course the exact properties will depend
on the types of cement, sand, and gravel
that are used (for example, whether or not
the sand or gravel is crushed). It is advisable
to ask the AVEBE application specialists for
support when developing your mixtures.
20% solution
For use in ready made
concrete
1 m 3 returnable container