Civil Engineering Reference
In-Depth Information
Requiremen
t
Performance
characteristic
Item
Test method
Structural
Non-structural
Class R4
Class R3
Class R2
Class R1
1
Compressive
Strength
EN 12190
t45 MPa t25 MPa t15 MPa
t10 MPa
2
Chloride content
EN 1015-17
d 0.05%
d 0.05%
3
Adhesive bond
*
EN 1542
t2.0 MPa
t1.5 MPa
t0.8MPa
4
Restrained
*
shrinkage
EN 12617-4
Bond streng
t
h after test
Not
required
t2.0 MPa
t1.5 MPa t0.8 MPa
5
Carbonation
resistance
EN 13295
dk d control concrete
Not required
*
Product or system applied to a reference concrete substrate to EN 1766
be for a CE-marked product that met the requirements of Method 7.2, but
with a minimum strength of 60 MPa.
Table 11.7
can be used to add additional properties for the repair mortar,
for example where the specific requirements of the project mean that a
successful repair application is more demanding. These may be required in
various situations, such as the repair having a structural requirement (elastic
modulus), which may be important because some resin mortar products may
have a modulus that is significantly lower than 20 GPa for Class R4. Also, if
the repair is in an area with particularly severe thermal cycles, then Items 7,
8 or 9 could be added, reflecting a severe northern European climate, a wet
Mediterranean climate, or a dry southern Mediterranean climate respectively.
It should be remembered that the performance standards do not limit the
materials that can be used in the products or systems. In the case of repair
mortar, the products are classified into three types (EN 1504-3):
•
CC - mortars made using only hydraulic cements as a binder, as defined
in EN197
•
PCC - mortars comprising hydraulic cements and polymer dispersions,
also-called 'polymer-modified cementitious mortar'
•
PC - mortars made using polymer binders only, such as epoxy, acrylic
or polyester resin.
Now that the CE-marking process has started, new products have begun
to appear on the market carrying the specified label and CE-mark, as set out
in Annex ZA of each performance standard. An example of a typical label is
shown in
Figure 11.2.
Many manufacturers have opted to test their products
and systems for both sets of requirements in the relevant performance
