oSIST prEN 13381-3:2008

SLOVENSKI STANDARD
01-december-2008
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Test methods for determining the contribution to the fire resistance of structural members
- Part 3: Applied protection to concrete members
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden
Bauteilen - Teil 3: Brandschutzmaßnahmen für Betonbauteile
Méthode d'essai pour déterminer la contribution à la résistance au feu des éléments de
construction - Partie 3: Protection appliquée aux éléments en béton
Ta slovenski standard je istoveten z: prEN 13381-3
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2008
ICS Will supersede ENV 13381-3:2002
English Version
Test methods for determining the contribution to the fire
resistance of structural members - Part 3: Applied protection to
concrete members
Méthode d'essai pour déterminer la contribution à la Prüfverfahren zur Bestimmung des Beitrages zum
résistance au feu des éléments de construction - Partie 3: Feuerwiderstand von tragenden Bauteilen - Teil 3:
Protection appliquée aux éléments en béton Brandschutzmaßnahmen für Betonbauteile
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 127.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13381-3:2008: E
worldwide for CEN national Members.

Contents Page
Foreword. 4
1 Scope. 5
2 Normative references. 5
3 Terms and definitions, symbols and units. 6
3.1 Terms and definitions. 6
3.2 Symbols and units . 7
4 Test equipment. 8
4.1 General. 8
4.2 Furnace. 8
4.3 Loading equipment. 8
5 Test conditions. 8
5.1 General. 8
5.2 Support and restraint conditions . 9
5.2.1 Standard support and restraint conditions. 9
5.2.2 Other support and restraint conditions. 9
5.3 Loading conditions. 9
6 Test specimens. 10
6.1 Type and number of test specimens. 10
6.1.1 Type of test specimens . 10
6.1.2 Number of test specimens . 10
6.2 Size of test specimens. 10
6.2.1 Concrete slabs. 10
6.2.2 Concrete beams. 11
6.3 Construction of concrete test specimens . 11
6.3.1 Concrete slab test members. 11
6.3.2 Concrete beam test members. 12
6.3.3 Fabrication of concrete test members. 12
6.3.4 Application of fire protection material to concrete test member. 12
6.4 Composition of test specimen component materials . 13
6.4.1 Concrete. 13
6.4.2 Steel reinforcement. 13
6.4.3 Fire protection system. 13
6.5 Properties of test materials. 13
6.5.1 Concrete. 13
6.5.2 Steel reinforcement. 14
6.5.3 Fire protection materials . 14
6.6 Verification of the test specimen. 14
7 Installation of the test construction. 15
7.1 Concrete slab test specimens . 15
7.2 Concrete beam test specimens . 15
8 Conditioning. 15
9 Application of instrumentation. 15
9.1 General. 15
9.2 Instrumentation for measurement of furnace temperature . 15
9.2.1 Slab specimens. 15
9.2.2 Beam specimens. 16
9.3 Instrumentation for the measurement of test specimen temperature. 16
9.3.1 General. 16
9.3.2 Large and small concrete slab test specimens . 16
9.3.3 Beams. 17
9.4 Instrumentation for the measurement of pressure . 18
9.5 Instrumentation for the measurement of deformation. 18
9.6 Instrumentation for the measurement of applied load. 18
10 Test procedure. 18
10.1 General. 18
10.2 Furnace temperature and pressure. 18
10.3 Application and control of load . 18
10.4 Temperature of test specimen. 19
10.5 Deformation. 19
10.6 Observations. 19
10.7 Termination of test. 19
11 Test results. 19
11.1 Acceptability of test results . 19
11.2 Presentation of test results. 19
12 Test report. 21
13 Assessment. 21
13.1 General. 21
13.2 Concrete slabs. 21
13.3 Concrete beams. 22
13.4 Insulation. 22
13.5 Stickability. 22
13.6 Equivalent thickness of concrete. 23
14 Report of the assessment . 23
15 Limits of applicability of the results of the assessment. 24
Annex A (normative) Test method to the smouldering fire or slow heating curve . 33
A.1 Introduction. 33
A.2 Evaluation of the results . 33
Annex B (normative) Measurement of properties of fire protection materials . 35
B.1 General. 35
B.2 Thickness of fire protection materials. 35
B.3 Density of applied fire protection materials. 36
B.3.1 General. 36
B.4 Moisture content of applied fire protection materials. 37
Annex C (normative) Equivalent thickness of concrete. 38
C.1 General. 38
C.1.1 Equivalent thickness of concrete slabs - preliminary data collection . 38
C.1.2 Equivalent thickness of concrete beams - preliminary data collection . 39
C.2 Equivalent thickness of concrete slabs and beams - assessment methodology. 39
Bibliography . 42

Foreword
This document (prEN 13381-3:2008) has been prepared by Technical Committee CEN/TC 127 “Fire
safety in buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede ENV 13381-3:2002.
This document has been prepared under a mandate given to CEN by the European Commission and
the European Free Trade Association, and supports essential requirements of 89/106/EEC.
This European Standard is one of a series of standards for evaluating the contribution to the fire
resistance of structural members by applied fire protection materials. Other parts of this standard are:
Part 1: Horizontal protective membranes.
Part 2: Vertical protective membranes.
Part 4: Applied protection to steel members.
Part 5: Applied protection to concrete/profiled sheet steel composite members.
Part 6: Applied protection to concrete filled hollow steel columns.
Part 7: Applied protection to timber members.
Annexes A, B and C are normative.
Caution
The attention of all persons concerned with managing and carrying out this fire resistance test, is
drawn to the fact that fire testing can be hazardous and that there is a possibility that toxic and/or
harmful smoke and gases can be evolved during the test. Mechanical and operational hazards can
also arise during the construction of test elements or structures, their testing and the disposal of test
residues.
An assessment of all potential hazards and risks to health shall be made and safety precautions shall
be identified and provided. Written safety instructions shall be issued. Appropriate training shall be
given to relevant personnel. Laboratory personnel shall ensure that they follow written safety
instructions at all times.
The specific health and safety instructions contained within this Standard shall be followed.

1 Scope
This part of this European Standard specifies a test method for determining the contribution of fire
protection systems to the fire resistance of structural concrete members, for instance slabs, floors,
roofs and walls and which can include integral beams and columns. The concrete can be lightweight,
normalweight or heavyweight concrete and of strength classes 20/25 (LC/C/HC) to 50/60 (LC/C/HC).
The member can contain steel reinforcing bars.
The test method is applicable to all fire protection materials used for the protection of concrete
members and includes sprayed materials, coatings, cladding protection systems and multi-layer or
composite fire protection materials, when the gap between the fire protection material and the
concrete member is less than 5 mm. Otherwise the test methods in prEN 13381-1 or prEN 13381-2,
as appropriate, apply.
This European Standard contains the fire test which specifies the tests which shall be carried out to
determine the ability of the fire protection material to remain coherent and fixed to the concrete and to
provide data on the temperature distribution throughout the protected concrete member, when
exposed to the standard temperature time curve.
In special circumstances, where specified in national building regulations, there can be a need to
subject the protection material to a smouldering curve. The test for this and the special circumstances
for its use are detailed in Annex A.
The fire test methodology makes provision for the collection and presentation of data which can be
used as direct input to the calculation of fire resistance of concrete members in accordance with the
procedures given in EN 1992-1-2.
This European Standard also contains the assessment which prescribes how the analysis of the test
data shall be made and gives guidance to the procedures by which interpolation shall be undertaken.
The limits of applicability of the results of the assessment arising from the fire test are defined
together with permitted direct application of the results to different concrete structures, densities,
strengths, thicknesses and production techniques over the range of thicknesses of the applied fire
protection system tested.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publica-
tions. These normative references are cited at the appropriate places in the text, and the publications
are listed hereafter. For dated references, subsequent amendments to or revisions of any of these
publications apply to this European Standard only when incorporated in it by amendment or revision.
For undated references the latest edition of the publication referred to applies (including
amendments).
EN 1363-1, Fire resistance tests – Part 1: General requirements
EN 1363-2, Fire resistance tests – Part 2: Alternative and additional procedures
EN 10080, Steel for the reinforcement of concrete – Weldable ribbed reinforcing steel B 500 –
Technical delivery conditions for bars, coils and welded fabric
EN 206-1, Concrete – Part 1: Specification, performance, production and conformity
EN 1992-1-1, Eurocode 2: Design of concrete structures – Part 1-1: General rules and rules for
buildings
EN 1992-1-2, Eurocode 2: Design of concrete structures – Part 1-2: General rules - Structural fire
design
ISO 8421-2, Fire protection – Vocabulary – Part 2: Structural fire protection
EN ISO 13943, Fire safety – Vocabulary (ISO 13943:1999)
3 Terms and definitions, symbols and units
3.1 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 1363-1,
EN ISO 13943, ISO 8421-2 and EN 206-1, and the following apply:
3.1.1
concrete member
element of building construction which is loadbearing and is fabricated from concrete, defined
according to EN 206-1. It may contain steel reinforcing bars
3.1.2
fire protection material
material or combination of materials applied to the surface of a concrete member for the purpose of
increasing its fire resistance
3.1.3
passive fire protection materials
materials which do not change their physical form upon heating and which provide fire protection by
virtue of their physical or thermal properties. They may include materials containing water which, on
heating, evaporates to produce cooling effects
3.1.4
reactive fire protection materials
materials which are specifically formulated to provide a chemical reaction upon heating such that their
physical form changes and in so doing provide fire protection by thermal insulative and cooling effects
3.1.5
fire protection system
fire protection material together with a prescribed method of attachment to the concrete member
3.1.6
fire protection
protection afforded to the concrete member by the fire protection system such that the temperature
throughout the depth of the structural member and upon any steel reinforcing bars within it is limited
throughout the period of exposure to fire
3.1.7
test specimen
concrete slab or beam test member plus the fire protection system under test
3.1.8
fire protection thickness
thickness of a single layer fire protection system or the combined thickness of all layers of a multilayer
fire protection system
3.1.9
stickability
ability of a fire protection material to remain sufficiently coherent and in position for a well defined
range of deformations, furnace and test specimen surface temperatures, such that its ability to
provide fire protection is not significantly impaired
3.1.10
critical temperature
temperature at which failure is expected to occur in steel reinforcement within the concrete at a given
load level
3.1.11
lathing
mechanical fixing aids comprising non-combustible wires or similar constructions fixed to the concrete
before sprayed fire protection material is applied
3.1.12
adhesive bond promoter
material applied to the surface of the concrete, prior to application of the fire protection material, for
promotion of increased bonding
3.1.13
equivalent thickness of concrete
theoretical thickness of concrete which provides the same thermal insulation for a given period of test
as does the given thickness of the applied fire protection system
NOTE Care shall be taken to ensure when using "equivalent thickness" that in the practical situation the
concrete thickness will not be reduced by spalling etc.
3.2 Symbols and units
Symbol Unit  Designation
L mm  Length of the test specimen exposed to the furnace
exp
L  mm  Centre to centre distance between the test specimen supports
sup
L  mm  Total length of the test specimen
spec
W mm  Width of the test specimen exposed to the furnace
exp
h  mm  Thickness of concrete slab or height of concrete beam specimen
l  mm  Distance of loading points from the specimen support points
sup
P  kN  Loading applied to the slab or beam test specimen
θ  °C  Critical temperature as specified in EN 1992-1-2
crit
d  mm  Depth in concrete at which chosen θ is noted
θ crit
d  mm  Thickness of fire protection material: d is minimum thickness and
p p(min)
dp is maximum applied thickness of fire protection material
(max)
∆θ °C  Temperature rise, as a function of time
CL
d  mm  Depth in unprotected concrete slab at which ∆θ is noted [used in
cc CL
annex C]
d  mm  Depth in protected concrete at which temperature rise ∆θ(d ,t) is
cp cp
measured at time t
∆θ( ) °C  Temperature rise measured in protected concrete at measured depth d
dcp,t cp
f  N/mm Yield strength of steel as defined in EN 10080
y
ε  mm  Equivalent concrete thickness
4 Test equipment
4.1 General
The furnace and test equipment shall be as specified in EN 1363-1.
4.2 Furnace
The furnace shall be designed to permit the dimensions of the test specimen to be exposed to heating
to be as specified in 6.2 and its installation to be as specified in Clause 7.
4.3 Loading equipment
Loading shall be applied according to EN 1363-1. The loading system shall permit loading, of the
magnitude defined in 5.3, to be applied along the length and width of the test specimen.
The loading equipment shall not inhibit the free movement of air above the test specimen and no part
of the loading equipment, other than at the loading points, shall be closer than 60 mm to the
unexposed surface of the test specimen.
5 Test conditions
5.1 General
Test specimens, subjected to predefined loading, are heated upon a furnace in horizontal orientation
to provide information on each of the following:
 the temperature distribution within the concrete test member;
 the behaviour of the fire protection system and its stickability;
 the behaviour of the test specimen with respect to specified performance criteria.
It is recommended that the test be continued until the mean temperature upon the main reinforcing
bars within the concrete reaches 700 °C, or any single maximum value of 750 °C is recorded, to give
the necessary information on the stickability of the fire protection system. However, these
temperatures may be modified if requested by the sponsor.
If the recommended termination temperatures are not reached after 6 hours test duration, the test
shall normally be terminated.
The procedures given in EN 1363-1 and, if applicable, EN 1363-2, shall be followed in the
performance of this test method unless specific contrary instruction is given herein.
5.2 Support and restraint conditions
5.2.1 Standard support and restraint conditions
Concrete slab test specimens shall be tested as a simply supported one way structure with two free
edges and an exposed surface and span as defined in 6.2.
Concrete beam test specimens shall be tested simply supported. The test arrangement shall provide
lateral stability.
The concrete slab or beam test member shall be installed onto the furnace to allow freedom for
longitudinal movement and deformation using at one side rolling support(s) and at the other hinge
support(s).
The surface of the bearings shall be smooth concrete or steel plates. The width of the bearings shall
be the minimum representative of practice.
5.2.2 Other support and restraint conditions
If the support and restraint conditions differ from the standard conditions specified in 5.2.1, these
conditions shall be described in the test report and the validity of the test results shall be restricted to
those tested.
5.3 Loading conditions
The load (P) applied to the test specimen shall be calculated, taking account of the dead-weight of the
specimen (measured or derived by calculation from samples of the components, see 6.5.1) and the
weight of load distribution beams or plates, such that the following bending moments are produced
and that the same stresses exist within the steel reinforcement:
small slabs  5 kN.m/m width
large slabs 14 kN.m/m width
beams  25 kN.m
For concrete slab test specimens the load shall be symmetrically applied to the test specimen along
two transverse loading lines, each one at a distance (L ) from each of the supports. The proportion
sup
of the total load applied at each loading position shall be as specified in Figure 1 (small slab test
specimen) and Figure 2 (large slab test specimen). The load shall produce stresses approximating to
a uniformly distributed load.
For concrete beam test specimens the load shall be symmetrically applied to the test specimen by a
two point loading system, each one at a distance (L ) from each of the supports. The proportion of
sup
the total load applied at each loading position shall be as specified in Figure 3. The load shall produce
stresses approximating to a uniformly distributed load.
Point loads shall be transferred to the test specimen through load distribution beams or plates
(Figures 1, 2 and 3).
The total contact area between these and the concrete surface of the test specimen shall be as
specified in EN 1363-1, provided that the load distribution beam or plate chosen has a flexural rigidity
large enough to give the required distribution of the load.
Load distribution beams, for safety reasons, shall have a height to width ratio of < 1.
If the load distribution beams or plates are of steel or other high conductivity material, they shall be
insulated from the surface of the concrete test specimen by a suitable thermal insulation material.
Unexposed surface thermocouples shall not be closer than 100 mm to any part of the load distribution
system as shown in Figures 1, 2 and 3.
6 Test specimens
6.1 Type and number of test specimens
6.1.1 Type of test specimens
The type of concrete test member used is determined by the type and practical situation to which the
fire protection system is to be used, i.e.:
a) fire protection systems to be used on flat, two dimensional concrete members only, such as slabs
and walls, are evaluated by carrying out the test on large concrete slabs;
b) fire protection systems to be used on beams and columns only, and subject to three and four
sided exposure, are evaluated by carrying out the test on concrete beams;
c) fire protection systems to be used on slabs, walls, beams and columns are evaluated by carrying
out the test on both concrete slabs and beams according to a) and b) above;
d) tests may be carried out, in addition to the large scale tests, on small concrete test slabs to
provide additional test results for the fire protection system when:
 it is to be applied to a concrete member of concrete thickness less than that specified in this test
method;
 it is to be applied at intermediate fire protection thickness between maximum and minimum
thickness;
 the test is carried out to the smouldering curve (Annex A).
6.1.2 Number of test specimens
Two full size loaded concrete members (either slabs or beams depending upon the end use as
specified in 6.1.1a) and 6.1.1b) shall be tested.
To one the minimum thickness of the fire protection system shall be applied and to the other the
maximum thickness. If the fire protection system is only available in a single thickness, then one test
on one type of member only shall be carried out at that thickness, and the applicability of the result
restricted.
In addition to the mandatory full size tests, small size tests may be carried out to obtain further data,
as defined in 6.1.1d). One such test shall be carried out for each and every variable of concrete
thickness or intermediate fire protection thickness to be considered. The use of the small slab in the
smouldering fire is given in Annex A.
6.2 Size of test specimens
6.2.1 Concrete slabs
The concrete test slabs shall be of the sizes specified in Table 1 and exemplified in Figure 1 (small
specimen) and Figure 2 (large specimen).
Table 1 — Sizes of concrete test slabs
small specimen large specimen
Exposed length (mm) L
≥ 1 300 and < 2 300 4 000 mm minimum
exp
Span (mm) L 4 200 minimum
sup ≥ 1 500 and < 2 700
(L +200) > L < (L +400) (L +200) > L < (L +400)
exp sup exp exp sup exp
[note] [note]
Specimen length (mm) L 4 400 mm minimum
spec ≥ 1 700 and < 3 000
(L +400) > L < (L +700) (L +400) > L < (L +700)
exp spec exp exp spec exp
Exposed width (mm) W
≥ 1 000 and < 2 000 ≥ 3 000
exp
Thickness (mm) h
(90 ± 10) (120 ± 10)
Position of loading points (600 ± 10) (1000 ± 10)
from support points (mm)
NOTE  The distance between the exposed part of the test specimen and the supports shall be kept as
small as possible. For tests of short duration (less than 240 minutes) a distance of 100 mm at either end is
recommended. For tests of longer duration this could be increased to 200 mm at either end, to protect the
test equipment from heat damage.

6.2.2 Concrete beams
The concrete test beams shall be of a size such that an overall exposed length (L ) not less than 4
exp
000 mm is obtained.
The span (L ) shall not be greater than the exposed length by more than 200 mm at each end.
sup
The total specimen length (L ) shall be not greater than the exposed length by more than 350 mm
spec
at each end.
The beam shall be of height (450 ± 10) mm and width (150 ± 10) mm.
The position of the loading points from the support points (lsup) shall be (1 000 ± 10) mm.
The beam construction is shown in Figure 3.
6.3 Construction of concrete test specimens
6.3.1 Concrete slab test members
Concrete slab test members shall contain a reinforcing mesh, which may comprise single
reinforcement bars tied together with lashing wire or a prefabricated "welded fabric" mesh.
The mesh (placed towards the exposed surface and protected by the fire protection material) shall
comprise 10,0 mm diameter ribbed bars for the large slab and 8,0 mm diameter ribbed bars for the
small slab. The permitted tolerances on dimensions of reinforcing bars are given in EN 10080.
For the large slab test member, only an upper mesh, at the unexposed surface, shall be used. It shall
comprise 6,0 mm diameter ribbed bars.
Reinforcing bars shall be centred (150 ± 10) mm apart in both directions. The position of the main
reinforcing bars with respect to the exposed and unexposed concrete surfaces shall be ensured by
the use of spacers, either plastic or concrete, such that the concrete cover obtained is
(20,0 ± 0,5) mm.
The actual position of the main reinforcing bars at the exposed and unexposed surfaces shall be
accurately measured and recorded after the test at the positions of the thermocouples specified in
9.3. This shall be achieved by cutting the concrete slab into at least two pieces through or close to the
required positions.
6.3.2 Concrete beam test members
Each concrete beam test member shall contain four ribbed reinforcing bars of 12 mm diameter, fixed
with 8,0 mm diameter stirrups at (200 ± 10) mm centres. The permitted tolerances on dimensions of
reinforcing bars are given in EN 10080.
The position of the 12 mm reinforcing bars with respect to the concrete surface shall be ensured by
the use of spacers, either plastic or concrete, such that the concrete cover obtained is
(25,0 ± 0,5) mm.
The actual position of the reinforcing bars at the concrete surface shall be accurately measured and
recorded after the test at the positions of the thermocouples specified in 9.3. This shall be achieved
by cutting the concrete beam into at least two pieces through or close to the required positions.
6.3.3 Fabrication of concrete test members
Slab and beam concrete test members shall be prepared in a smooth surfaced framework made from
steel or timber. To facilitate release of the slab or beam from the framework, soluble oils or emulsions
shall be used. The actual material used for this purpose shall be detailed in the test report.
Waxes, insoluble oils or other release agents may be used within this test method but they shall be
subject to restricted application (see 15.10) and each release agent intended to be used shall be
separately assessed.
6.3.4 Application of fire protection material to concrete test member
The fire protection material shall be uniformly applied to the concrete, as in practice, including any
required fixing aids, e.g. lathes, meshes and wires or adhesive bond promoters, and in the same
manner for both maximum and minimum fire protection thickness.
The fire protection material shall extend over the full exposed surface(s) of beams and slabs, and be
applied prior to the application of the test load.
Where a fire protection system creates a small cavity between the concrete and the fire protection
material, the ends shall be sealed with fire resistant material to prevent any flow of hot gases out of
the cavities.
Fixing profiles for board type fire protection systems can be orientated in both longitudinal and
transverse directions of the test specimen. Fixing profiles orientated in the longitudinal direction, for
each line of fixing profiles, shall include a joint at mid span.
Fixing profiles orientated in the transverse direction shall include joints in accordance with the
following:
Large slab specimens At least one transverse joint positioned not further than 500 mm
from the transverse axis.
Small slab specimens At least one transverse joint positioned not further than 100 mm
from the transverse axis.
Beams At least one joint shall be positioned at mid-span, or as close to
mid-span as is possible on both sides and base of the beam.

6.4 Composition of test specimen component materials
6.4.1 Concrete
The concrete in the test specimen shall normally be of type 25/30 to 30/37 [LC/C/HC] (light-weight,
normal-weight or heavy-weight concrete) according to EN 206-1 and EN 1992-1-1, although other
grades within the strength range 20/25 to 50/60 may be used, (see clause 1).
The applicability of the results of the assessment arising from the testing of a particular density,
strength or thickness of concrete will be restricted according to 15.1 to 15.3 and 15.5.
The concrete shall be prepared from silicious aggregates, of maximum aggregate size of 20 mm, and
portland cement. The composition and properties of the concrete used shall be appropriate to those
defined in EN 206-1 and EN 1992-1-1.
Other non-silicious and lower density aggregates may be permitted, but the applicability of the results
of the assessment will be restricted according to 15.4.
The consistency of the wet concrete shall allow for good compaction and smooth surface. The
consistency shall be of type S3 or F3 determined in accordance with EN 206-1.
6.4.2 Steel reinforcement
The steel reinforcement bars used shall be ribbed and shall be of grade B 500 (to EN 10080) or
comparable European Standard grade with f = 500 N/mm .
y
6.4.3 Fire protection system
The composition of the fire protection system shall be specified by the sponsor and include, at least,
its expected nominal density, thickness and moisture content. For confidentiality reasons the sponsor
may not wish detailed formulation or composition details to be reported in the test report. Such data
shall, however, be provided and maintained in confidence in laboratory files.
6.5 Properties of test materials
The actual material properties of test specimen component materials shall be determined, according
to EN 1363-1 and using appropriate product test standards, on test materials or test samples
conditioned as described in Clause 8.
6.5.1 Concrete
The concrete strength of all batches of concrete used shall be measured at intervals during
conditioning (see clause 8) and on the day of the fire test according to one of the methods specified in
EN 206-1.
The density and moisture content of all batches of concrete used shall be measured at intervals
during conditioning and on the day of the fire test using small samples prepared at the same
thickness and at the same time and from the same materials as each concrete member to be tested.
These small samples, of size 200 mm × 200 mm × thickness of test sample shall have been covered,
after preparation, on five sides with a water impermeable membrane, the top surface exposed, and
conditioned with the concrete test member as specified in Clause 8. The method used to prepare and
condition these test samples shall be reported.
The dimensions of the concrete member measured before application of the fire protection material
together with weight of reinforcement and the final concrete density may be used to calculate the
dead-weight contribution of the concrete to the calculation of load.
6.5.2 Steel reinforcement
The grade of steel bars used for reinforcement shall be confirmed either by measurement to
appropriate standards or by certificate of conformity, against the specification given in 6.4.2, which
shall be provided by the supplier.
6.5.3 Fire protection materials
The actual thickness, density and moisture content of the fire protection materials shall be measured
and recorded, at the time of test, either directly upon the fire protection material or materials or on
special test samples taken. These shall be conditioned as defined in clause 8. The measurement
procedures appropriate to different types of material are given in Annex B.
The thickness of a board or panel type fire protection material shall not deviate by more than 15 % of
the mean value over the whole of its surface. The mean value shall be used in the assessment of the
results and the limits of applicability of the assessment. If it deviates by more than 15 %, the
maximum thickness recorded shall be used in the assessment.
The thickness of a sprayed or coated passive or reactive type fire protection material shall not deviate
by more than 20 % of the mean value over the whole of its surface. The mean value shall be used in
the assessment of the results and the limits of applicability of the assessment. If it deviates by more
than 20 %, the maximum thickness recorded shall be used in the assessment.
The density of fire protection material applied to the concrete at minimum and maximum thickness
shall be recorded. The mean value of the density of the fire protection m
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