SIST EN 771-1:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Festlegungen für Mauersteine - Teil 1: MauerziegelSpécification pour éléments de maçonnerie - Partie 1 : Briques de terre cuiteSpecification for masonry units - Part 1: Clay masonry units91.100.25Ceramic building productsICS:Ta slovenski standard je istoveten z:FprEN 771-1kSIST FprEN 771-1:2010en,fr,de01-november-2010kSIST FprEN 771-1:2010SLOVENSKI
STANDARD



kSIST FprEN 771-1:2010



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 771-1
September 2010 ICS 91.100.25 Will supersede EN 771-1:2003English Version
Specification for masonry units - Part 1: Clay masonry units
Spécification pour éléments de maçonnerie - Partie 1 : Briques de terre cuite
Festlegungen für Mauersteine - Teil 1: Mauerziegel This draft European Standard is submitted to CEN members for unique acceptance procedure. 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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
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Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 771-1:2010: EkSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 2 Contents Page Foreword .41 Scope .52 Normative references .53 Terms and definitions .64 Materials and manufacture .95 Requirements for clay masonry units .95.1 General .95.2 LD units . 105.2.1 Dimensions and tolerances (LD units) . 105.2.2 Configuration (LD units) . 125.2.3 Density (LD units) . 135.2.4 Compressive strength (LD units) . 145.2.5 Thermal properties (LD units) . 155.2.6 Durability (LD units). 155.2.7 Water absorption (LD units) . 155.2.8 Active soluble salts content (LD units) . 155.2.9 Moisture movement (LD units) . 165.2.10 Reaction to fire (LD units) . 165.2.11 Water vapour permeability (LD units) . 165.2.12 Bond strength (LD units) . 165.3 HD units . 175.3.1 Dimensions and tolerances (HD units) . 175.3.2 Configuration (HD units) . 185.3.3 Density (HD units) . 195.3.4 Compressive strength (HD units) . 205.3.5 Thermal properties (HD units) . 215.3.6 Durability (HD units) . 215.3.7 Water absorption (HD units) . 215.3.8 Initial rate of water absorption (HD units) . 215.3.9 Active soluble salts content (HD units) . 225.3.10 Moisture movement (HD units) . 225.3.11 Reaction to fire (HD units) . 225.3.12 Water vapour permeability (HD units) . 225.3.13 Bond strength (HD units) . 236 Description, designation and classification of clay masonry units . 236.1 Description and designation . 236.1.1 LD units . 236.1.2 HD units . 246.2 Classification . 247 Marking . 258 Evaluation of conformity . 258.1 General . 258.2 Initial type testing . 258.3 Factory production control . 268.3.1 General . 268.3.2 Testing and measuring equipment . 278.3.3 Production equipment . 278.3.4 Raw materials . 278.3.5 Production process . 27kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 3 8.3.6 Finished product testing . 278.3.7 Statistical techniques . 278.3.8 Marking and stock control of products . 278.3.9 Traceability . 288.3.10 Nonconforming products . 28Annex A (normative)
Sampling for initial type testing and for independent testing of consignments . 29A.1 General . 29A.2 Sampling procedure . 29A.2.1 General . 29A.2.2 Random sampling . 29A.2.3 Representative sampling . 29A.2.4 Dividing the sample . 30A.2.5 Number of units required for testing . 30Annex B (informative)
Additional information . 33B.1 Use of clay masonry units . 33B.2 Durability . 34B.3 Freeze/thaw resistance . 34B.3.1 General . 34B.3.2 Masonry subjected to severe exposure . 34B.3.3 Masonry subjected to moderate exposure . 35B.3.4 Masonry subjected to passive exposure . 35B.4 Sulfate action on mortars and plasters . 35B.5 Efflorescence and staining . 36B.6 General guidance on the appearance of facing clay masonry units . 36Annex C (informative)
Guidance on frequencies for designing a FPC system to demonstrate conformity of finished products with the requirements of the standard and the declaration of the manufacturer . 37Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 39ZA.1 Scope and relevant characteristics . 39ZA.2 Procedure(s) for attestation of conformity of clay masonry units . 42ZA.2.1 System(s) of attestation of conformity . 42ZA.2.2 EC Certificate and Declaration of Conformity . 43ZA.3 CE marking and labelling. 44Bibliography . 49 kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 4 Foreword This document (FprEN 771-1:2010) 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 Unique Acceptance Procedure. This document will supersede EN 771-1:2003. 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 EU Construction Products Directive (89/106/EEC). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. It also takes into account the general rules for unreinforced and reinforced masonry in Eurocode 6. Annex A of this document is normative, Annexes B, C and ZA are informative. EN 771, Specification for masonry units consists of:  Part 1: Clay masonry units  Part 2: Calcium silicate masonry units  Part 3: Aggregate concrete masonry units (Dense and light weight aggregates)  Part 4: Autoclaved aerated concrete masonry units  Part 5: Manufactured stone masonry units  Part 6: Natural stone masonry units
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FprEN 771-1:2010 (E) 5 1 Scope This European Standard specifies the characteristics and performance requirements for masonry units manufactured from clay for use in masonry construction (e.g. facing and rendered masonry, loadbearing or non-loadbearing masonry structures, including internal linings and partitions, for building and civil engineering). This European Standard is intended to apply to two groups of fired-clay masonry units: a) LD units (see 3.4 and 5.2) comprising: 1) clay masonry units with a gross dry density of less than or equal to 1 000 kg/m3 for use in protected masonry. b) HD units (see 3.5 and 5.3) comprising: 1) all clay masonry units for use in unprotected masonry; 2) clay masonry units with a gross dry density of greater than 1 000 kg/m3 for use in protected masonry. This European Standard includes those clay masonry units of an overall non-rectangular parallelepiped shape. 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 evaluation of conformity of the product to this European Standard. The marking requirement for products covered by this European Standard is included. This European Standard does not specify standard sizes for clay masonry units, nor does it specify standard work dimensions, angles and radii of specially shaped clay masonry units. This document does not include method of measurement, tolerance and range requirements for dimensions, angles and radii characteristics of specially shaped clay masonry units. This European Standard does not cover requirements for the following: units for paving, flue liners and storey height clay masonry units and clay masonry units with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to fire. It does, however, include clay masonry units for external chimney masonry. 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 772-5, Methods of test for masonry units — Part 5: Determination of the active soluble salts content of clay masonry units EN 772-7, Methods of test for masonry units — Part 7: Determination of water absorption of clay masonry damp proof course units by boiling in water kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 6 EN 772-9, Methods of test for masonry units — Part 9: Determination of volume and percentage of voids and net volume of calcium silicate masonry units by sand filling EN 772-11, Methods of test for masonry units — Part 11: Determination of water absorption of aggregate concrete, autoclaved aerated concrete, manufactured stone and natural stone masonry units due to capillary action and the initial rate of water absorption of clay masonry units 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 772-20, Methods of test for masonry units — Part 20: Determination of flatness of faces of aggregate concrete, manufactured stone and natural stone masonry units FprEN 772-21, Methods of test for masonry units — Part 21: Determination of water absorption of clay and calcium silicate masonry units by cold water absorption
EN 1052-3, Methods of test for masonry — Part 3: Determination of initial shear strength prEN 1745:2010, Masonry and masonry products — Methods for determining thermal properties EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests EN ISO 12572, Hygrothermal performance of building materials and products — Determination of water vapour transmission properties (ISO 12572:2001) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. NOTE Annex B to this European Standard is informative and gives descriptions of such matters as applications, exposure and durability. 3.1 masonry unit preformed component intended for use in masonry construction 3.2 clay masonry unit masonry unit 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 3.3 protected masonry masonry which is protected against water penetration NOTE It can either be masonry in external walls which is protected, (e.g. by a layer of suitable render or by cladding), or it can be the inner leaf of a cavity wall or it can be an internal wall. It may or may not be loadbearing 3.4 LD unit clay masonry unit with a low gross dry density for use in protected masonry kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 7 3.5 HD unit clay masonry unit for unprotected masonry as well as clay masonry unit with a high gross dry density for use in protected masonry 3.6 co-ordinating size size of the co-ordinating space allocated to a masonry unit including allowances for joints and tolerances 3.7 work size size of a masonry unit specified for its manufacture, to which the actual size conforms within permissible deviations 3.8 actual size size of a masonry unit as measured 3.9 regular-shaped masonry unit masonry unit with an overall rectangular parallelepiped shape 3.10 specially shaped masonry unit masonry unit which is not a rectangular parallelepiped 3.11 accessory unit masonry unit which is shaped to provide a particular function, e.g. to complete the geometry of the masonry 3.12 interlocking features shaped matched projections and indentations on masonry units EXAMPLE Tongue and groove systems. 3.13 vertical perforation formed void that passes completely through a masonry unit perpendicular to the bed face 3.14 horizontal perforation formed void that passes completely through a masonry unit parallel to the bed face 3.15 cell formed void that does not pass through a masonry unit 3.16 frog depression formed in one or both bed faces of a unit 3.17 recess depression or indentation in one or more surfaces of a masonry unit
EXAMPLE Mortar pocket, rendering keyway, grip hole. kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 8 3.18 grip hole hole in a masonry unit to enable it to be more readily grasped and lifted by hands or machine 3.19 shell peripheral material between a perforation and the surface of a masonry unit 3.20 web solid material between the perforations in a masonry unit 3.21 declared value value that a manufacturer is confident in achieving, bearing in mind the precision of test and the variability of the manufacturing process 3.22 mean compressive strength of masonry units arithmetic mean of the compressive strengths of masonry units 3.23 normalized compressive strength compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm wide × 100 mm high masonry unit NOTE See the procedure given in EN 772-1. 3.24 damp proof course unit clay masonry unit which, when laid in two courses with broken bond in a strong cementitious mortar, will resist rising damp in masonry 3.25 high precision clay masonry unit clay masonry unit with small dimensional tolerance especially in unit height 3.26 vertically perforated or hollow clay masonry unit clay masonry unit with one or more formed voids that pass completely through a masonry unit perpendicular to the bed face 3.27 horizontally perforated or hollow clay masonry unit clay masonry unit with one or more formed voids that pass completely through a masonry unit parallel to the bed face 3.28 clay masonry unit for concrete or mortar infill clay masonry unit with special perforation suitable for concrete or mortar infill 3.29 clay masonry unit for masonry panels clay masonry unit suitable for production of reinforced masonry or masonry storey height panels with vertical channels for mortar or concrete infill kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 9 3.30 clay masonry subject to severe exposure masonry or elements of masonry which under end use conditions are subjected to saturation with water (driving rain, ground water) combined with frequent freeze/thaw-cycling, due to climatic conditions and absence of protective features 3.31 clay masonry subject to moderate exposure masonry or elements of masonry which, under end use conditions, are exposed to moisture and freeze/thaw-cycling, excluding constructions subjected to severe exposure 3.32 clay masonry subject to passive exposure masonry or elements of masonry which under end use conditions are not intended to be exposed to moisture and freezing conditions 3.33 Category I masonry units units with a declared compressive strength with a probability of failure to reach it not exceeding 5 % NOTE This may be determined via the mean or characteristic value. 3.34 Category II masonry units units not intended to comply with the level of confidence of Category I units 3.35 combined thickness of webs and shells sum of the thicknesses of the shells and webs from one face or header of a masonry unit to the opposite face or header respectively along whichever path, via the formed voids, gives the smallest value, expressed as a percentage of the unit width or length respectively 3.36 product group products from one manufacturer having common values for one or more characteristics 3.37 consignment shipment from the supplier 4 Materials and manufacture See 3.2, 8.3.4 and 8.3.5. 5 Requirements for clay masonry units 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. NOTE It should be noted that the test methods are not usually applicable to specially shaped and accessory units as defined in 3.10 and 3.11. The conformity criteria given in the following subclauses relate to initial type testing (see 8.2) and, when relevant, to consignment testing (see Annex A). For the compressive strength of Category I units use a 50 % fractile (p = 0,50) for mean values and a confidence level of 95 %. kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 10 For production evaluation, the manufacturer shall define the conformity criteria in the factory production control documentation (see 8.3). The manufacturer shall declare whether the unit fulfils the requirements for LD units (see Figure 2) or HD units (see Figure 3). 5.2 LD units 5.2.1 Dimensions and tolerances (LD units) 5.2.1.1 Dimensions (LD units) The dimensions of a clay masonry unit shall be declared by the manufacturer in mm for length, width, and height, in that order (see Figure 1). They shall be given in terms of work size. NOTE In addition the co-ordinating size may be given.
Key 1 Length 3 Height 5 Face 2 Width 4 Bed 6 Header
NOTE This relates to the normal use of the masonry unit in the wall. Figure 1 — Dimensions and surfaces The measurement procedure shall be in accordance with EN 772-16. 5.2.1.2 Dimensional tolerances (LD units) 5.2.1.2.1 Tolerances (LD units) The manufacturer shall also declare which of the tolerance categories for mean values in 5.2.1.2.2 the clay masonry units fulfil. When relevant to the uses for which the unit is placed on the market, the manufacturer shall also declare which of the range categories in 5.2.1.2.3 a given consignment of the clay masonry units fulfils. NOTE This additional declaration may be made for example in relation to: − achievement of the required accuracy (planarity, bonds and thin layer joints) of the masonry; − use of detailed project drawings to achieve these requirements. kSIST FprEN 771-1:2010



FprEN 771-1:2010 (E) 11 5.2.1.2.2 Tolerances of the mean value (LD units) When clay masonry units are sampled from a consignment in accordance with Annex A and tested in accordance with EN 772-16, the difference for all dimensions between the declared value and the mean value derived from measurements of the test sample shall not be greater than the declared one of the following categories, where the value shall be rounded to the whole mm:  T1: ± 0,40
dimension) size (work mm or 3 mm whichever is the greater  T1+: ± 0,40
dimension) size (work mm or 3 mm for length and width whichever is the greater and ± 0,05
dimension) size (work mm or 1 mm for the height whichever is the greater  T2: ± 0,25
dimension) size (work mm or 2 mm whichever is the greater  T2+: ± 0,25
dimension) size (work mm or 2 mm for length and width whichever is the greater and ± 0,05
dimension) size (work mm or 1 mm for the height whichever is the greater  or Tm: a deviation in mm declared by the manufacturer (may be wider or closer than the other categories). 5.2.1.2.3 Range (LD units) When declared and regular-shaped clay masonry units are sampled from a consignment in accordance with Annex A and tested in accordance with EN 772-16, the maximum range for any given dimension (i.e. the difference between the largest and smallest determined dimensions on individual units) to be found within the test sample shall be within the declared one of the five categories indicated below, where the value shall be rounded to whole mm: Category Maximum range R1: 0,6 dimension) size (workmm R1+: 0,6 dimension) size (workmm for length and width and 1,0 mm for the height R2: 0,3 dimension) size (workmm R2+: 0,3 dimension) size (workmm for length and width and 1,0 mm for the height or Rm: a range i
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