prEN 1170

SLOVENSKI STANDARD
01-januar-2024
Montažni betonski izdelki - Preskusne metode za steklocementni kompozit
Precast concrete products - Test methods for Glass fibre Reinforced Concrete
Betonfertigteile - Prüfverfahren für Glasfaserbeton
Produits préfabriqués en béton - Méthodes d'essai des composites ciment-verre
Ta slovenski standard je istoveten z: prEN 1170
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2023
ICS Will supersede EN 1170-1:1997, EN 1170-2:1997, EN
1170-3:1997, EN 1170-4:1997, EN 1170-5:1997, EN
1170-6:1997, EN 1170-7:1997, EN 1170-8:2008
English Version
Precast concrete products - Test methods for Glass fibre
Reinforced Concrete
Produits préfabriqués en béton - Méthodes d'essai des Betonfertigteile - Prüfverfahren für Glassfaserbeton
composites ciment-verre
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 229.
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-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1170:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Symbols and abbreviated terms . 4
3.1 Symbols . 4
3.2 Abbreviated terms . 5
4 Sampling and preparation of test pieces . 5
4.1 Apparatus . 5
4.2 Test coupons . 6
5 Bending strength . 7
5.1 General. 7
5.2 Apparatus . 7
5.3 Procedure . 7
5.4 Expression of results . 9
5.5 Test report . 10
6 Water absorption and dry density . 11
6.1 General. 11
6.2 Apparatus . 11
6.3 Procedure . 12
6.4 Expression of results . 14
6.5 Test report sheet . 14
7 Measurement of extremes of dimensional variations due to moisture content . 15
7.1 General. 15
7.2 Apparatus . 15
7.3 Procedure . 15
7.4 Expression of results . 17
7.5 Interpreting the test . 17
7.6 Test report . 18
Annex A (normative) Specific parameters related to production methods . 19
Annex B (normative) Specific parameters related to test coupons cut from GRC products . 20
Annex C (informative) Cyclic weathering type test . 21
Bibliography . 24
European foreword
This document prEN 1170:2023 has been prepared by Technical Committee CEN/TC 229 “Precast
Concrete Products”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1170-1:1997, EN 1170-2:1997, EN 1170-3:1997, EN 1170-4:1997, EN
1170-5:1997, EN 1170-6:1997, EN 1170-7:1997 and EN 1170-8:2008.
EN 1170:2023 includes the following significant technical changes with respect to EN 1170-1:1997, EN
1170-2:1997, EN 1170-3:1997, EN 1170-4:1997, EN 1170-5:1997, EN 1170-6:1997, EN 1170-7:1997 and
EN 1170-8:2008:
— Removal of the tests previously described in parts 1 to 4, not referred to in EN 1169,
— Modification of the dimensions of the mould for test boards,
— Increase of the load speed for the flexural strength test,
— Introduction of a sample volume determination by weighing in water,
— Provisions to allow the cutting of test coupons directly from products.
1 Scope
This document specifies test methods for identifying the performance of a GRC composition in terms of
bending strength, water absorption, dry density, and dimensional variations.
These methods can be used for type testing or for the evaluation of the uniformity of the production
process. They can be used on GRC coupons prepared as described in this document, or on samples cut
out of GRC products.
A cyclic weathering type test is also described for information in Annex C.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 7500-1, Metallic materials - verification of static uniaxial testing machines - Part 1: Tensile testing
machines
3 Symbols and abbreviated terms
For the purposes of this document, the following symbols and abbreviated terms apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1 Symbols
B width of test piece, in millimetres
d thickness of test piece, in millimetres
F load at limit of proportionality, in newtons
LOP
F failure load, in Newtons
MOR
l length of test piece, in millimetres
L span, in millimetres
l distance between washers measured at the beginning of the test,
n
in micrometres
l distance between washers measured after 96 h immersion, in
micrometres
l distance between washers measured after 21 days drying in oven
and 6 h stabilization, in micrometres
m mass of a test piece in air, in grammes
a
m mass of a test piece after drying, "dry mass", in grammes
d
m apparent mass of the immersed stirrup, in grammes
st
m apparent mass of the immersed test piece, in grammes
w
m mass of a test piece after immersion for "j" days, "wet mass", in
wj
grammes
m mass of test piece at the beginning of the test, in grammes
m mass of test piece after 96 h immersion, in grammes
m mass of test piece after 21 days oven drying and 6 h stabilisation,
in grammes
V volume of a test piece, in cm3
Υ water absorption by immersion, in percentage by mass
Δ deflection at limit of proportionality, in millimetres
LOP
Δ deflection at failure, in millimetres
MOR
∆𝑙𝑙
value of extreme dimensional variation, in millimetres per metre
𝑐𝑐
𝑙𝑙
∆𝑙𝑙
value of expansion, in millimetres per metre; this is the arithmetic
𝑒𝑒
mean of the expansion values of the three test pieces tested
𝑙𝑙
∆𝑙𝑙
value of residual shrinkage, in millimetres per metre; this is the
𝑠𝑠
arithmetic mean of the shrinkage values of the three test pieces
𝑙𝑙
tested
ε strain at limit of proportionality
LOP
ε strain at failure
MOR
ρ dry density, in kg/m3
d
ρ density of water, at 20 °C, taken as 998 kg/m3
w
σ stress at limit of proportionality, in megapascals
LOP
σ stress at failure, in megapascals
MOR
3.2 Abbreviated terms
GRC Glass fibre reinforced concrete
LOP Limit of proportionality
MOR Modulus of rupture
4 Sampling and preparation of test pieces
4.1 Apparatus
Flat test board moulds with internal dimensions of not less than 500 mm × 500 mm with a (12 ± 0,5) mm)
upstand around the edges from which a minimum of 4 test coupons, each 275 mm minimum × (50 ± 2)
mm can be cut; the test coupons shall be taken from the central area within a border approximately 50
mm from each edge.
4.2 Test coupons
Make sample boards using the moulds described in clause 4 for each spray team, if Sprayed GRC, or mixer,
if Premix GRC, per day or production shift, with no facing layer (solid GRC only) under the same
conditions as for the actual production they represent.
Where the direction of production can have an influence on the results, Annex A may apply.
Demould and store the sample boards under the same conditions as for the actual production they
represent.
Cut out by sawing in each panel, at a minimum distance of 50 mm from the edges, 4 test coupons from
the positions illustrated in Figure 1.
Mark the test coupons as shown in Figure 1.
Dimensions in mm
Key
TC1 to TC4 test coupons for bending strength
TC5 to TC8 test coupons for water absorption and dry density
TZ test zone
Figure 1 — Position and identification of test coupons
Dimensions of the test coupons:
— width: (50 ± 2) mm,
— length: minimum 275 mm.
The test board method is the reference method, but in some cases, it may be considered necessary to cut
coupons directly from products. In this case, Annex B applies.
Storage of the test boards/coupons:
The test coupons shall be stored/cured under the same conditions as the products which they represent.
5 Bending strength
5.1 General
This clause specifies a test method for identifying the stress and deformation performance, at the limit of
proportionality and on failure, of a GRC composition subjected to bending.
It is used for the evaluation of the uniformity of the production process. It can also be used to establish,
for a given composition of GRC, the relationship between the conventional strength at 28 days and the
strength at 7 days, or at other ages.
This method can be used on GRC coupons prepared as described in this document, or on samples cut out
of GRC products.
5.2 Apparatus
The apparatus comprises:
— a bending test machine of
...