oSIST prEN 17193:2018

Clay blocks for floor plates

This document specifies the characteristics for clay blocks in concrete ribbed floor systems. It specifies two types of clay blocks:
-   clay blocks for load-bearing"structural" use (semi-resisting clay blocks and resisting clay blocks)) with essential characteristics:
-   detailing:
-   dimensions;
-   minimum dimensions;
-   configuration;
-   density;
-   mechanical strength:
-   punching (resistance to concentrated loads);
-   longitudinal compressive strength;
-   bending strength;
-   fire:
-   resistance to fire;
-   reaction to fire;
-   thermal conductivity;
and:
-   clay blocks for non-load bearing-non-structural or light structural- use (low non-resisting clay blocks or non-resisting clay blocks) with essential characteristics:
-   detailing:
-   dimensions;
-   minimum dimensions;
-   configuration;
-   density;
-   mechanical strength:
-   punching (resistance to concentrated loads);
-   fire:
-   resistance to fire;
-   reaction to fire;
-   thermal conductivity.
The clay blocks are used with floor plates (EN 13747:2005+A2:2010) and in situ concrete, or only with in situ concrete for the construction of ribbed floor systems.
It includes the test/assessment methods and the way of expressing the test/assessment results.
It provides for the assessment and verification of constancy of performance (AVCP) of the product to maintain the performances related to the declared essential characteristics.
This document does not cover characteristics for clay blocks foreseen for beam-and-block floor systems as covered by EN 15037-3:2009+A1:2011.

Deckenziegel

Diese Europäische Norm legt die Eigenschaften und Leistungsanforderungen für nicht tragende (statisch wenig mitwirkend oder statisch nicht mitwirkend) oder tragende (statisch teilweise mitwirkend oder statisch mitwirkend) keramische Zwischenbauteile zur Verwendung für Deckenplatten fest.
Sie definiert die Leistungsfähigkeit bezüglich z. B. Maßtoleranzen, Festigkeit, Dichte, gemessen nach entsprechenden Prüfverfahren aus gesonderten Europäischen Normen.
Sie ermöglicht die Bewertung und Überprüfung der Leistungsbeständigkeit (en: Assessment and Verification of Constancy of Performance, AVCP) des Produkts nach dieser Europäischen Norm.
Diese Europäische Norm umfasst keine Anforderungen an keramische Zwischenbauteile, die für Balkendecken mit Zwischenbauteilen vorgesehen sind.

Systèmes de planchers nervurés en béton à entrevous en terre cuite

Keramična polnila za etažne plošče

General Information

• Status: Not Published
• Public Enquiry End Date: 14-Jan-2018
• ICS: 91.100.25 - Terracotta building products
• Technical Committee: CAA - Mineral binders and masonry
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 08-Dec-2017
• Due Date: 27-Apr-2018
• Completion Date: 02-Mar-2018
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/100 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on precast concrete products
• Mandate: M/116 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on masonry and related products
• Ref Project: FprEN 17193 - Clay blocks for concrete ribbed floor systems

Overview

The European Standard oSIST prEN 17193:2018 specifies essential characteristics and performance requirements for clay blocks used in concrete ribbed floor systems. Developed by the CEN Technical Committee 125 "Masonry," this standard ensures that clay blocks used in these systems meet strict criteria for dimensions, mechanical strength, fire resistance, and thermal properties. The standard covers two primary types of clay blocks:

• Load-bearing structural clay blocks: Including semi-resisting and resisting blocks that contribute to the floor's structural integrity.
• Non-load-bearing or light-structural clay blocks: Including low non-resisting and non-resisting blocks primarily serving as formwork.

oSIST prEN 17193:2018 regulates the quality and consistency of clay blocks integrated with floor plates and concrete components in ribbed floor construction, emphasizing safety, performance, and regulatory compliance in construction projects.

Key Topics

Clay Block Types and Characteristics

• Load-Bearing Clay Blocks: Designed for use in structural components, these blocks possess essential mechanical properties such as:
  • Longitudinal compressive strength enabling load transfer.
  • Punching resistance to withstand concentrated loads.
  • Bending strength performance for durability.
• Non-Load-Bearing Clay Blocks: Function mainly as support for wet concrete during construction and possess minimum mechanical requirements.

Dimensional and Configuration Requirements

• Precise dimensions and minimum sizes are prescribed for blocks to ensure compatibility with concrete ribs.
• Detailed configuration standards including top flange design and presence of recesses for reinforcement and concrete filling.
• Density specifications ensure blocks meet structural and thermal efficiency goals.

Mechanical Strength & Fire Safety

• Tests for mechanical resistance include compressive and punching strength, classifying blocks as Class R1 or R2 based on their load-bearing capacity.
• Fire safety requirements cover resistance to fire and reaction to fire, helping to comply with EU building regulations.

Thermal and Durability Properties

• The standard mandates assessment of thermal conductivity to ensure energy efficiency in floor systems.
• Durability criteria ensure clay blocks maintain long-term performance under environmental and load stresses.

Assessment and Verification

• Includes test methods for evaluating block properties.
• Provides a framework for Assessment and Verification of Constancy of Performance (AVCP), guaranteeing consistent quality in manufacturing and finished products.

Applications

oSIST prEN 17193:2018 clay blocks are widely applicable in the construction of ribbed concrete floor systems, particularly in commercial, residential, and industrial buildings where:

• Structural integrity and load distribution through the floor slabs are critical.
• Fire resistance and thermal performance are prioritized.
• Compatibility with floor plates (per EN 13747) and in situ concrete installation is required.
• Reliable, standardized clay block materials are necessary for compliance with EU regulations and sustainable building practices.

These clay blocks enhance overall construction efficiency by serving as integral components during and after concrete placement in ribbed floors, ensuring safety, durability, and performance.

Related Standards

• EN 13747: Specifies floor plates used alongside clay blocks in ribbed floor systems.
• EN 15037-3: Covers clay blocks used in beam-and-block floor systems, which oSIST prEN 17193:2018 does not address.
• EN 772 Series: Governs testing methods for masonry units including compressive strength, density, and dimensions.
• EN 13501-1: Classification of construction products and building elements regarding fire reaction.
• EN 1745: Covers thermal property determination methods for masonry products.
• ISO 12491: Statistical methods for quality control of building materials.

By aligning with these standards, oSIST prEN 17193:2018 ensures clay blocks meet comprehensive performance and regulatory criteria, supporting quality-driven construction workflows.

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Keywords: clay blocks, concrete ribbed floor systems, load-bearing blocks, semi-resisting blocks, resisting blocks, non-load-bearing blocks, mechanical strength, fire resistance, thermal conductivity, floor plates, CEN standard, AVCP, construction products regulation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2018
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Clay blocks for floor plates
Deckenziegel
Ta slovenski standard je istoveten z: prEN 17193
ICS:
91.100.25 Gradbeni izdelki iz terakote Terracotta building products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 17193
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2017
ICS 91.100.25
English Version
Clay blocks for floor plates
Deckenziegel
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 125.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17193:2017 E
worldwide for CEN national Members.

prEN 17193:2017 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements — Materials and manufacture . 10
5 Finished product requirements . 10
5.1 General . 10
5.2 Dimensions and tolerances . 10
5.2.1 Dimensions . 10
5.2.2 Dimensional tolerances . 11
5.3 Configuration . 11
5.3.1 Minimum dimensions . 11
5.3.2 Configuration of blocks . 13
5.4 Density . 13
5.4.1 Gross dry density . 13
5.4.2 Net dry density . 14
5.4.3 Tolerances . 14
5.5 Surface characteristics . 14
6 Mechanical resistance . 14
6.1 General . 14
6.2 Class R1 . 14
6.3 Class R2 . 15
7 Other requirements . 15
7.1 Reaction to fire . 15
7.2 Acoustic properties . 15
7.3 Thermal properties . 16
7.4 Durability . 16
7.5 Moisture movement . 16
7.6 Dangerous substances . 16
8 Description, designation and classification of clay blocks for floor plates . 16
8.1 Description and designation . 16
8.2 Classification . 17
9 Marking . 17
10 Assessment and verification of constancy of performance (AVCP) . 17
10.1 General . 17
10.2 Product type determination . 18
10.3 Factory production control . 18
10.3.1 General . 18
10.3.2 Testing and measuring equipment . 19
10.3.3 Production equipment . 19
10.3.4 Raw materials . 19
10.3.5 Production process . 19
10.3.6 Finished product testing . 19
prEN 17193:2017 (E)
10.3.7 Statistical techniques . 20
10.3.8 Marking and stock control of products . 20
10.3.9 Traceability . 20
10.3.10 Nonconforming products . 20
Annex A (normative) Test methods . 21
A.1 Measuring of dimensions and surface characteristics . 21
A.1.1 Block dimensions . 21
A.1.2 Other dimensions and configuration. 22
A.1.3 Interpretation of results . 23
A.1.4 Test report . 23
A.2 Mechanical strength . 23
A.2.1 Resistance to concentrated loads . 23
A.2.2 Longitudinal compressive strength . 25
Annex B (normative) Sampling for product type determination tests and for independent
testing of consignments . 28
B.1 General . 28
B.2 Sampling procedure . 28
B.2.1 General . 28
B.2.2 Random sampling . 28
B.2.3 Representative sampling . 28
B.2.4 Dividing the sample . 29
B.2.5 Number of blocks required for testing . 29
Annex C (informative) Guidelines for test frequencies for designing a FPC system to
demonstrate conformity of finished products with the requirements of the standard
and the declaration of the manufacturer . 30
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No.305/2011 . 32
Bibliography . 36

prEN 17193:2017 (E)
European foreword
This document (prEN 17193:2017) has been prepared by Technical Committee CEN/TC 125 “Masonry”,
the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports basic requirements for construction works of the
EU Construction Products Regulation (Regulation (EU) No 305/2011).
For relationship with EU Regulation/Directive(s) see informative Annex ZA, which is an integral part of
this document.
This document was examined by and agreed with a joint working party appointed by the Liaison Group
CEN/TC 125 – CEN/TC 229.
The products are foreseen for the use in floor systems according to EN 13747.
prEN 17193:2017 (E)
1 Scope
This European Standard specifies the characteristics and performance requirements for non-
loadbearing (low non-resisting or non-resisting) or loadbearing (semi-resisting or resisting) clay blocks
for the use in floor plates.
It defines the performance related to e.g. dimensional tolerances, strength, density measured according
to the corresponding test methods contained in separate European Standards.
It provides for the assessment and verification of constancy of performance (AVCP) of the product to
this European Standard.
This European Standard does not cover requirements for clay blocks foreseen for beam-and-block floor
systems.
2 Normative references
The following referenced documents are indispensable for the application 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 772-1, Methods of test for masonry units — Part 1: Determination of compressive strength
EN 772-3, Methods of test for masonry units — Part 3: Determination of net volume and percentage of
voids of clay masonry units by hydrostatic weighing
EN 772-9, Methods of test for masonry units — Part 9: Determination of volume and percentage of voids
and net volume of clay and calcium silicate masonry units by sand filling
EN 772-13, Methods of test for masonry units — Part 13: Determination of net and gross dry density of
masonry units (except for natural stone)
EN 772-16, Methods of test for masonry units — Part 16: Determination of dimensions
EN 772-19, Methods of test for masonry units — Part 19: Determination of moisture expansion of large
horizontally perforated clay masonry units
EN 1745, Masonry and masonry products — Methods for determining thermal properties
EN 12390-4:2000, Testing hardened concrete — Part 4: Compressive strength — Specification for testing
machines
EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification
using data from reaction to fire tests
ISO 12491, Statistical methods for quality control of building materials and components
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
prEN 17193:2017 (E)
3.1
clay block
block made from clay or other argillaceous materials with or without sand, fuel or other additives fired
at a sufficiently high temperature to achieve a ceramic bond
3.2
low non-resisting or non-resisting block
block with no mechanical function in the final floor system (designated LNR or NR)
Note 1 to entry: Its only mechanical function is that of formwork during the construction of the floor system.
Floor systems built with non-resisting blocks may lack in situ structural topping.
3.3
semi-resisting block
block participating in the transfer of loads to the ribs (designated SR)
Note 1 to entry: However, its top flange alone cannot act as a compression slab in the final floor system.
Note 2 to entry: Examples for semi-resisting blocks are shown in Figure 1.

Figure 1 — Examples of semi-resisting clay blocks
3.4
resisting block
block with the same functions as semi-resisting blocks but whose top flange plays a role as compression
zone in the final floor system (designated RR)
Note 1 to entry: Examples for resisting blocks are shown in Figure 2.
prEN 17193:2017 (E)
Key
1 rib
2 top flange
3 tongue
Figure 2 — Examples of resisting clay blocks
3.5
recess
single (see Figure 4 b)) or double (see Figure 4 c)) indentation at the top flange of the block to be filled
with concrete (with or without reinforcement) to make cross joints
Note 1 to entry: According to the depth of the recesses the designation is:
F: blocks with full recesses (see Figure 4)
P: blocks with partial recesses (see Figure 3)
3.6
top flange
cross section area with the height s where longitudinal compression can be transferred
Note 1 to entry: The height of the compression zone is limited to the height of the top flange (see Figure 2):
prEN 17193:2017 (E)
a) Section b) Block with single recess c) Block with double recess
Figure 3 — Block with top flange (limited compression zone)

a) Section b) Block with single full recess c) Block with double full recess
Figure 4 — Block without limited compression zone
3.7
complementary block
block of shorter length, width or height designed to aid the construction of floors having dimensions
which are not multiples of the dimensions of blocks
3.8
rib
reinforced concrete ribs are structural elements realized in corresponding recesses of the floor system,
formed by interposed rows of clay blocks (see Figure 2)
3.9
tongue
shape given to the block to enable reinforced concrete ribs to be cast between the blocks
Note 1 to entry: Examples of tongues are shown in Figure 5.

Figure 5 — Examples of tongues
prEN 17193:2017 (E)
3.10
groove
upper indentation in the top flange of resisting blocks in which concrete and longitudinal reinforcement
bars can be located (see Figure 6)

Key
1 groove
2 concrete rib
3 clay block
4 tongue
Figure 6 — Details of resisting clay blocks
3.11
shell
peripheral material between a perforation and the surface of a clay block
3.12
web
solid material between the perforations in a clay block
3.13
combined thickness of webs and shells
sum of the thicknesses of the vertical shells and webs in transverse direction from one rib of a clay
block to the opposite rib along whichever path, via the formed voids, gives the smallest value, expressed
as a percentage of the unit width
3.14
Category I clay blocks
blocks with a declared compressive strength with a probability of failure to reach it not exceeding 5 %
Note 1 to entry: This may be determined via the mean or characteristic value.
3.15
Category II clay blocks
blocks not intended to comply with the level of confidence of Category I blocks
3.16
product group
products from one manufacturer having common values for one or more characteristics
prEN 17193:2017 (E)
3.17
product type
set of representative performance levels or classes of a construction product, in relation to its essential
characteristics, produced using a given combination of raw materials or other elements in a specific
production process
4 Requirements — Materials and manufacture
See 3.1, 10.3.4 and 10.3.5.
5 Finished product requirements
5.1 General
The requirements and properties specified in this standard shall be defined in terms of the test methods
and other procedures referred to in this European Standard.
The conformity criteria given in the following subclauses relate to product type determination
(see 10.2) and, when relevant, to consignment testing (see Annex B). For the compressive strength of
Category I blocks use a 50 % fractile (p = 0,50) for mean values and a confidence level of 95 %.
For production evaluation, the manufacturer shall define the conformity criteria in the factory
production control documentation (see 10.3).
5.2 Dimensions and tolerances
5.2.1 Dimensions
The relevant dimensions of a clay block shall be declared by the manufacturer in mm (see Figure 7).

Key
b width s width of groove
S0 height t depth of groove
l length s height of recess
t
a width of tongue s total depth of recess
b
s1 thickness of top flange
Figure 7 — Dimensions
prEN 17193:2017 (E)
The measurement procedure shall be in accordance with Annex A.
5.2.2 Dimensional tolerances
5.2.2.1 Tolerances of the mean value
The manufacturer shall also declare which of the tolerance categories according to Table 1 for mean
values, the clay blocks fulfil.
Table 1 — Tolerance categories for mean values
width of
other
width b height h length l tongue and
dimensions
groove
T1 ±10 mm
T2 ±5 mm
(−5;0) % (0;+5) % (−5;0) % ±3 mm ±5 mm
but not more but not more but not more
T3
than than than
(−12;0) mm (0;+12) mm (−12;0) mm

Lower tolerances may be declared by the manufacturer.
5.2.2.2 Range
The maximum range for the width (i.e. the difference for a same batch between the largest and smallest
determined dimension on individual blocks) to be found within the test sample shall be less than or
equal to 2,5 % but not more than 12 mm of the declared value.
Lower range may be declared by the manufacturer.
5.3 Configuration
5.3.1 Minimum dimensions
For blocks with tongue, the minimum dimensions for the width of a tongue shall be 25 mm.
The design of the ribs and tongues and upper grooves shall be such as to enable longitudinal
reinforcement and the associated concrete cover to be placed and the tongue to be at least 5 mm thick
at its thinnest point.
The area of the largest of any formed voids for semi-resisting blocks (SR) and resisting blocks (RR) shall
be:
• 6 cm for blocks without limited compression zone
• for blocks with limited compression zone 6 cm in the top flange
For resisting blocks (RR) and semi-resistant blocks (SR) at the faces there shall, and at the top and
bottom there may, be rendering keyways approximately 2 mm deep and not wider than 10 mm. The
sections between rendering keyways shall be not wider than 30 mm. At the grooves, the shell shall be at
least 8 mm thick.
The manufacturer shall also declare which of the dimension categories according to Table 2 and Table 3
regarding the minimum thickness of the shells and the top flange the clay blocks fulfil.
prEN 17193:2017 (E)
Table 2 — Dimension categories regarding the shells of the blocks
Minimum
thickness of
shells
SH1 6 mm
SH2 8 mm
SH3 12 mm
Table 3 — Dimension categories regarding the top flange of the blocks
Minimum height s
TF1 30 mm
TF2 see Table 5
TF3 Block without limited compression zone
The blocks shall fulfil the minimum dimensions for total depth of recess s , the height of recess s and
b t
for blocks with limited compression zone the thickness of top flange s1 according to Table 4 (blocks
without limited compression zone) and Table 5 (blocks with top flange).
Table 4 — Minimum dimensions (mm) for blocks without limited compression zone
Height s min. recess
total depth height s
t
s
b
≤ 265 40 s s - 10
t = 0
265 < s ≤ 340 50
Table 5 — Minimum dimensions (mm) for blocks with top flange
Total height Min. recess Min. thickness
s of top flange
Total depth Height
s
s
b s
t
< 115 40 45 50
115 ≤ s ≤ 140 40 50 55
140 < s ≤ 165 40 55 60
165 < s ≤ 190 40 60 65
190 < s ≤ 215 40 65 70
215 < s ≤ 240 40 70 75
240 < s ≤ 265 40 75 80
265 < s ≤ 290 50 80 85
290 < s ≤ 315 50 85 90
315 < s ≤ 340 50 90 95
prEN 17193:2017 (E)
In order to enable the adjacent in situ beam to be wider at the top, the semi-resisting blocks shall be
narrow and flat to a depth of not less than x = 30 mm, and then gently tapered to a depth of x = 50 mm
1 2
from the top of the block (see Figure 1).
5.3.2 Configuration of blocks
All relevant dimensions of a clay block shall be declared by the manufacturer (see Figure 1 to 7).
When relevant to the uses for which the blocks are placed on the market the following shall also be
declared:
— shape and pattern of perforation;
— minimum thickness of the horizontal web;
— the minimum overall thickness of vertical webs and shells of resisting blocks; measurement shall be
taken half height of the block
— the design value of the web and shell thickness of resisting blocks according to Table 6.
Table 6 — Design web and shell thicknesses (mm) of resisting blocks
Combined thickness of Design web and
webs and shells shell thickness
[%]
≥ 20 50
≥ 24 60
≥ 28 70
≥ 32 80
5.4 Density
5.4.1 Gross dry density
When relevant to the uses for which the unit is placed on the marked, the gross dry density shall be
declared by the manufacturer.
The manufacturer may also inform in what way the declared gross dry density fits into a national
classification system.
The manufacturer shall also declare which of the deviation categories in 5.4.3 applies.
This declaration may be made for evaluation of
— loading;
— airborne sound insulation;
— resistance to fire;
— thermal insulation.
In addition, the manufacturer may declare the minimum and maximum individual values of gross dry
density.
prEN 17193:2017 (E)
5.4.2 Net dry density
When relevant to the uses for which the unit is put on the market, the net dry density shall be declared
by the manufacturer.
The manufacturer may also inform in what way the declared net dry density fits into a national
classification system.
In addition, the manufacturer may declare the minimum and maximum individual values of net dry
density.
5.4.3 Tolerances
When clay blocks are sampled from a consignment in accordance with Annex A and tested in
accordance with EN 772-13, the mean gross and net dry density derived from measurements of the test
sample shall not differ from the manufacturer's declared dry density by more than one of the following
categories:
D1: 10 %
D2: 5 %
or
Dm: a deviation in % declared as a whole number by the manufacturer (may be wider or closer than the
other categories).
5.5 Surface characteristics
Blocks shall not have cracks or spalling which may be detrimental to their mechanical performance.
For test method see A.1.2.6.
6 Mechanical resistance
6.1 General
The manufacturer shall declare which class of mechanical resistance the blocks fulfil.
6.2 Class R1
The following properties shall be verified by direct load testing made on samples taken following
proper statistical criteria (see Annex A, ISO 12491):
— the resistance to concentrated loads for each type of block (see a));
— the longitudinal compressive strength for resisting and semi-resisting blocks (see b)).
a) Resistance to concentrated loads:
The blocks shall be classified in type defined by the characteristic failure load obtained in the test of the
resistance to concentrated loads described in A.2.1.
Table 7 gives the minimum characteristic failure load (5 % fractile) for each type of block.
prEN 17193:2017 (E)
Table 7 — Minimum characteristic resistance under concentrated loads
Minimum characteristic resistance under
concentrated loads
Type of clay block
(5 % fractile) in kN
Low-non-resisting 0,7
(LNR)
Non-resisting (NR) 1,5
Semi-resisting (SR) 2,0
Resisting (RR) 2,5
Higher values may be declared by the manufacturer.
b) Longitudinal compressive strength of resisting and semi-resisting blocks:
When testing as specified in A.2.2, the characteristic value of the longitudinal compressive strength of
the resisting blocks shall be declared.
6.3 Class R2
The following properties shall be verified:
— the longitudinal compressive strength of resisting blocks (see a)).
a) Longitudinal compressive strength of resisting blocks:
When testing as specified in A.2.2, the characteristic value of the longitudinal compressive strength of
the resisting blocks shall be declared. If relevant, the class of the compressive strength of the clay block
shall be declared.
7 Other requirements
7.1 Reaction to fire
For clay blocks intended to be used in elements subject to fire requirements the manufacturer shall
declare the reaction to fire classification of the clay block.
Clay blocks containing ≤ 1,0 % by mass or volume (whichever is the most onerous) of homogeneously
distributed organic materials the declaration may be fire Class A1 without the need to test.
Clay blocks containing > 1,0 % by mass or volume (whichever is the most onerous) of homogeneously
distributed organic materials shall be classified in accordance with EN 13501-1 and the appropriate fire
classification declared.
NOTE Attention is drawn to the Commission Decision 96/603/EC as amended by the Commission Decision
2000/605/EC in which non-combustible clay blocks containing not more than 1,0 % by mass or volume
(whichever is the more onerous) of homogeneously distributed organic materials are classified as reaction to fire
Class A1 without testing.
7.2 Acoustic properties
When relevant to the uses the gross dry density and the configuration of the blocks shall be declared.
Acoustic properties depend on the finished floor system (type of blocks, applied elements in upper
and/or lower face of the floor, etc.).
prEN 17193:2017 (E)
7.3 Thermal properties
When relevant the manufacturer shall provide information on the thermal properties of the type of
product. It shall be done by reference to EN 1745.
NOTE Thermal performances depend on the finished floor system (e.g. type of blocks, applied elements in
upper and/or lower face of the floor).
7.4 Durability
The durability of blocks shall be consistent with the durability of beams used for the construction of the
floor system. When the intended use of the block provides a complete protection against water
penetration, no reference to freeze/thaw resistance is required.
7.5 Moisture movement
When relevant the mean moisture movement, tested in accordance with EN 772-19 on 6 samples, shall
be less than 0,6 mm/m.
7.6 Dangerous substances
National regulations on dangerous substances may require verification and declaration on release, and
sometimes content, when construction products covered by this standard are placed on those markets.
In the absence of European harmonized test methods, verification and declaration on release/content
should be done taking into account national provisions in the place of use.
NOTE An informative database covering European and national provisions on dangerous substances is
available at the Construction website on EUROPA accessed through: http://ec.europa.eu/enterprise/construction/cpd-
ds/.
8 Description, designation and classification of clay blocks for floor plates
8.1 Description and designation
A description and designation of a clay block for floor plates shall comprise at least the following:
a) the number and date of issue of this European Standard;
b) type of block (see 3.2, 3.3 and 3.4);
c) type of recesses (see 3.5);
d) dimensions and tolerances (mean value) (see 5.2.1 and 5.2.2.1);
e) minimum dimensions (5.3.1);
f) gross dry density (see 5.4);
g) mechanical resistance class and the longitudinal compressive strength (see 6).
When relevant to the uses for which the block is placed on the market, the description and designation
shall include:
h) configuration (see 5.3);
i) tolerances (range) (see 5.2.2.2);
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j) reaction to fire (see 7.1);
k) acoustic properties (see 7.2);
l) thermal properties (see 7.3);
m) moisture movement (see 7.5)
n) dangerous substances (see 7.6)
8.2 Classification
Specification of the properties of clay blocks may be given by reference to classification systems
provided those systems are based only on single properties included in this standard and do not
themselves constitute a barrier to trade.
This does not remove the requirement that all manufacturers claiming compliance with this standard
shall state declared values of the properties of their products when required.
9 Marking
The following particulars shall be clearly marked on one of the following: the blocks, the packaging,
delivery note or any certificate supplied with the clay blocks:
a) name, trademark, or other means of identification of the manufacturer of the blocks;
b) means of identifying the clay blocks and relating them to their description and designation.
NOTE For CE marking and labelling ZA.3 applies. When ZA.3 requires the CE marking to be accompanied by
the same information as required by this clause, the requirements of this clause can be considered to have been
met.
10 Assessment and verification of constancy of performance (AVCP)
10.1 General
The manufacturer shall demonstrate compliance for his product with the requirements of this
European Standard and with the declared performance for the product properties by carrying out both:
— product type determination (see 10.2), which can be physical testing, calculation, reference to
tabulated values or combinations of these methods;
— factory production control (see 10.3).
Alternative methods of test to the reference methods specified in this European Standard may be
adopted except for the product type determination tests and in case of dispute, provided that these
alternative methods satisfy the following:
a) a correlation can be shown to exist between the results from the reference method and those from
the alternative method; or
b) a safe relationship can be demonstrated when using the alternative method compared to the
reference methods and
c) the information on which the relationship is based is available.
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10.2 Product type determination
After completion of the development of a new product type and before placing on the market,
appropriate product type determination shall be carried out to confirm that the properties predicted
from the development meet the requirements of this standard and the performance of the
characteristics to be declared for the product.
Whenever a major change in the source, blend, or nature of raw materials occurs, or when there is a
change in processing conditions, leading to what the manufacturer considers will constitute a new
product type being produced, the appropriate product type determination shall be repeated.
The manufacturer may define product groups. The product group may differ according to the
characteristics in question.
In the product type determination process, a manufacturer may take into consideration already existing
results.
A manufacturer may use the product type determination results determined by someone else (e.g.
another manufacturer or a research, technology and development service provider) to justify his own
declaration of performance regarding a product that is manufactured according to the same design and
with raw materials, constituents and manufacturing methods of the same kind, provided that
permission is given by the owner of the results, and the results are valid for both products.
The tests to be conducted shall be the tests or calculations as described in Table A.1 or A.2 for the
properties selected from the following list relevant to the manufacturer’s declaration for the product
type’s intended use:
— dimensions;
— dimensional tolerances;
— configuration and minimum dimensions;
— dry density;
— longitudinal compressive strength;
— thermal properties;
— moisture movement;
— reaction to fire.
Sampling for product type determination tests shall be in accordance with Annex A.
The results of product type determination shall be recorded.
NOTE For the performance characteristics to be determined in order to address the Declaration of
Performance and CE marking provisions, see Table ZA.1.
10.3 Factory production control
10.3.1 General
The manufacturer shall establish, document and maintain a factory production control system to enable
continuing conformity with this European Standard and the declared performance of characteristics of
the products placed on the market.
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The factory production control system may consist of procedures related to the process only (full
process control and consequently no finished product testing, i.e. 10.3.6 does not apply), to finished
products only (consequently no process control, i.e. 10.3.5 does not apply) or any combination of both.
Consequently conformity criteria depend on the individual factory production procedures.
As appropriate, the responsibility, authority and interrelation of all personnel who manage, perform
and verify work affecting the quality of clay blocks shall be established.
The factory production control system shall describe the control procedure of production, the regular
checks by the manufacturer and his testing, depending on the combination of the procedures related to
process control and/or finished product testing. Controls and tests may include the characteristics of
raw materials and finished products, the procedure of production, the production equipment or the
production machines, the test equipment or the testing instruments and the marking of the product.
The test results shall be recorded.
Actions to be taken when the control test values or criteria do not meet those specified should be
documented by the manufacturer.
For Category I clay blocks the factory production control system shall be designed so that the
probability of failure to reach the declared compressive strength is not exceeding 5 % corresponding to
95 % confidence level.
10.3.2 Testing and measuring equipment
All relevant weighing, measuring and testing equipment, that has an influence on the declared values,
shall be verified and regularly inspected.
10.3.3 Production equipment
When the factory production control system includes process control procedures, all production
equipment, that forms part of these procedures and has an influence on the declared values shall be
regularly inspected.
10.3.4 Raw materials
As appropriate, the manufacturer shall define the acceptance criteria of raw materials and the
procedures operated to ensure that these are met.
10.3.5 Production process
As appropriate, the relevant features of the production processes shall be defined giving the frequency
of the manufacturer’s checks together with the required criteria. Actions to be taken when the criteria
are not achieved shall be specified by the manufacturer.
10.3.6 Finished product testing
As appropriate, the factory production control system shall incorporate a sampling plan and the
frequency of testing of the finished product. The results of sampling and testing shall be recorded.
The sample shall be representative of the production.
Guidance on testing frequencies for the characteristics of the finished products is given in Table 1 in
Annex C. The guidance should only be used if no better information is available.
Depending on the corrective measure, nonconformities may result in higher frequencies of testing than
the ones used.
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10.3.7 Statistical techniques
When reasonably practicable and applicable, the results of checks and testing shall be interpreted by
means of statistical techniques, by attributes or by variables, to verify the product characteristics and to
determine if the production conforms to the compliance criteria and the product conforms to the
declared values.
NOTE One method of satisfying this conformity criterion is to use the approach given in ISO 12491.
10.3.8 Marking and stock control of products
The marking and stock control shall be documented. Individual products or/and a defined quantity of
products (e.g. a consignment of products) should be identifiable and traceable.
10.3.9 Traceability
As appropriate, systems of traceability shall be given in the factory production control system.
10.3.10 Nonconforming products
The procedure for dealing with nonconforming products shall be documented. Products that do not
conform with the requirements or the performance of the product type shall be segregated and marked
accordingly. However, these products may be reassessed by the manufacturer and assigned to another
product type.
The manufacturer shall take action to avoid a reoccurrence of the nonconformity.
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Annex A
(normative)
Test methods
A.1 Measuring of dimensions and surface characteristics
A.1.1 Block dimensions
A.1.1.1 General
Check the following dimensions with an accuracy of 1,0 mm, after removal of any burr that could induce
measurement errors.
A.1.1.2 Procedure
Two separate measurements shall be made of the length, width and height of each block.
Measurements shall be taken as specified in Figure A.1 using a vernier calliper, the sides of which shall
be capable of extending over the whole block.
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Figure A.1 — Taking of measurements to determine dimensions and shape
A.1.2 Other dimensions and configuration
A.1.2.1 Width and depth of recesses
Place the block upside down on a level horizontal surface (the flatness shall be controlled). Take two
separate measurements for the width (s ) and for the depth (s ) at each side of the block as specified in
b t
Figure A.2.
Figure A.2 — Measurements to determine width and depth of recesses
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