Tesatura unidirectionala din fibre de bazal cu rezistenta ridicata MAPEI MAPEWRAP B UNI-AX
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Unidirectional,
high strength basalt
fibre fabric
WHERE TO USE
This system is suitable for repairing reinforced cement
elements damaged by physical-mechanical stresses,
combined compressive and bending stress confinement
of concrete elements and for seismic upgrading of
structures in high-risk areas.
Some application examples
• Repairs and static upgrading of damaged or
deteriorated structures where the shear strength of
sections requires integrating.
• Confining compressed and pre-compressed elements
(pillars, bridge piles, chimneys, etc.) to improve their
load-bearing capacity or ductility.
• Seismic upgrading and restoration of domed
structures without increasing their seismic mass and
without the risk of liquids percolating towards their
inner surfaces.
• Repairs to structures damaged by fire.
• Strengthening load-bearing elements in buildings
whose structural system has been modified due to
new architectural requirements or change in use.
TECHNICAL CHARACTERISTICS
MapeWrap B UNI-AX is a unidirectional basalt fibre
fabric characterised by its medium modulus of elasticity
and high tensile strength. They may be applied using
two different techniques:
– “damp” system;
– “dry” system;
using a complete range of epoxy resins comprising:
– MapeWrap Primer 1, suggested for the strengthening
of the substrate;
–M
apeWrap 11 and MapeWrap 12 recommended
for the levelling of surfaces with a roughness
equal or greater than ± 2 mm. Application is also
recommended to improve the adhesion and facilitate
the application of high weight fabrics (600 g/m² or
higher) (the workability time of MapeWrap 12 is higher
than that of MapeWrap 11);
–M
apeWrap 21 fabric impregnator for “damp”
systems;
–M
apeWrap 31 fabric impregnator for “dry” systems.
With the “damp” system, the fabric is pre-impregnated
with MapeWrap 21 and then installed, while with the
“dry” system, the dry fabric is positioned direc
tly on a
layer of MapeWrap 31 previously applied on the surface
of the concrete element to be strengthened.
MapeWrap B UNI-AX is 40 cm wide and is produced
in two different weights (400 and 600 g/m²) to meet the
widest range possible of architectonic requirements.
These two fabrics are denominated:
– MapeWrap B UNI-AX 400;
– MapeWrap B UNI-AX 600.
ADVANTAGES
Unlike work carried out using conventional techniques,
thanks to their extremely low weight, fabrics from
the MapeWrap B UNI-AX range may be applied by
a smaller team of workers. With the “dry” system
or the “damp” system (which only requires tools to
make impregnation easier), application is carried out
extremely quickly and often without having to interrupt
the normal activities of the structure.
Compared with the cladding technique with metal plates
[Rinforzo strutturale] 1011-mapewrap b uni-ax-gb (6) (22.11.2019 - Corr. PDF Sito)
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(beton plaquè), MapeWrap B UNI-AX fabrics
may be adapted
to any form of element
requiring repair, they do not require
temporary supports during application and
any risk of corrosion to the strengthening
is completely eliminated.
RECOMMENDATIONS
All workers must use protective gloves,
goggles and anti-solvent safety masks.
APPLICATION PROCEDURE
Preparation of the substrate
The surface on which MapeWrap B UNI-AX
fabrics are to be applied must be perfectly
clean, dry and strong.
If applied on undamaged structures,
sandblast the surface to remove all traces
of stripping compound, varnish, paint and
cement laitance.
If the concrete is deteriorated, remove all
damaged parts using a hammer, a jackhammer or by hydro-scarifying.
Remove all traces of rust from the
reinforcement rods and protect them using
Mapefer, two-component anti-corrosion
cementitious mortar or Mapefer 1K, single
component cementitious mortar (please refer
to the respective Technical Data Sheet for
each product for application procedures).
Repair concrete surfaces using products
from
the Mapegrout range.
Wait at least three weeks before applying
MapeWrap B UNI-AX.
If the strengthening operation needs to be
carried out immediately, use MapeWrap 11
or MapeWrap 12 to carry out repairs.
Seal all cracks in the structure by injecting
Epojet or Epojet LV (suitable only for dry
or slightly damp cracks) or with Foamjet T
or Foamjet F (suitable for damp cracks or if
water is seeping in).
All sharp corners on elements which are to
be strengthened with MapeWrap B UNI-AX
(such as beams and pillars) must be rounded
off with a jack-hammer or other suitable
means. We recommend forming a bending
radius of at least 2 cm.
“Damp” system application technique
for MapeWrap B UNI-AX
Application phases
1. Preparation of MapeWrap Primer 1.
2. Application of MapeWrap Primer 1.
3. Preparation of MapeWrap 11 or
MapeWrap 12.
4. Application of MapeWrap 11 or
MapeWrap 12.
5. Preparation of MapeWrap 21.
6. Impregnation of the fabric with
MapeWrap 21.
7. Application of MapeWrap B UNI-
AX fabric.
1. Preparation of MapeWrap Primer 1
The two components which make up
MapeWrap Primer 1 must be mixed
together. Pour component B into component
A and mix with a low-speed drill with a mixing
attachment until the resin is completely
blended. Mixing ratio: 3 parts by weight
of component A and 1 part by weight of
component B. To avoid dosage mistakes, use
the entire contents of the two components. If
only partial quantities are required, use highprecision electronic scales to weigh out the
components (this procedure must also be
adopted for the other products).
Once prepared, its workability time is
approximately 90 minutes at +23°C.
2. Application of MapeWrap Primer 1
Apply an even coat of MapeWrap Primer 1
on the clean, dry concrete surface with
a brush or roller. If the surface is highly
absorbent, apply a second coat of MapeWrap
Primer 1 once the first coat has been
completely absorbed. Skim over the surface
whilst the product underneath is still “fresh”.
Use MapeWrap
AX fabric.
1. Preparation of MapeWrap Primer 1
The two components which make up
MapeWrap Primer 1 must be mixed
together. Pour component B into component
A and mix with a low-speed drill with a mixing
attachment until the resin is completely
blended. Mixing ratio: 3 parts by weight
of component A and 1 part by weight of
component B. To avoid dosage mistakes, use
the entire contents of the two components. If
only partial quantities are required, use highprecision electronic scales to weigh out the
components (this procedure must also be
adopted for the other products).
Once prepared, its workability time is
approximately 90 minutes at +23°C.
2. Application of MapeWrap Primer 1
Apply an even coat of MapeWrap Primer 1
on the clean, dry concrete surface with
a brush or roller. If the surface is highly
absorbent, apply a second coat of MapeWrap
Primer 1 once the first coat has been
completely absorbed. Skim over the surface
whilst the product underneath is still “fresh”.
Use MapeWrap
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