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oSIST prEN 13381-3:2008
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
oSIST prEN 13381-3:2008 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 13381-3:2008
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oSIST prEN 13381-3:2008
EUROPEAN STANDARD
DRAFT
prEN 13381-3
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.
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oSIST prEN 13381-3:2008
prEN 13381-3:2008 (E)
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
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prEN 13381-3:2008 (E)
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
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oSIST prEN 13381-3:2008
prEN 13381-3:2008 (E)
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.
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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
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prEN 13381-3:2008 (E)
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
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prEN 13381-3:2008 (E)
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]
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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
2
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.
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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 distri
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