1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1468:2012Natural stone Rough slabs RequirementsBS EN 1468:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1468:2012.It supersedes
2、 BS EN 1468:2003 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/545, Natural stone.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provi
3、sions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012ISBN 978 0 580 75817 1 ICS 73.020; 91.100.15 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard w
4、as published under the authority of the Standards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 1468:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1468 April 2012 ICS 73.020; 91.100.15 Supersedes EN 1468:2003English Versi
5、on Natural stone - Rough slabs - Requirements Pierres naturelles - Tranches brutes - Exigences Naturstein - Rohplatten - Anforderungen This European Standard was approved by CEN on 9 March 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
6、for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in th
7、ree 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 b
8、odies 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, Turkey and
9、 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1468:20
10、12: EBS EN 1468:2012EN 1468:2012 (E) 2 Contents Page Foreword 31 Scope 52 Normative references 53 Terms and definitions .54 Requirements .64.1 Requirements for geometric characteristics 64.1.1 Measurement criteria .64.1.2 Requirements for thickness .64.1.3 Requirements for flatness 64.1.4 Requiremen
11、ts for surface finish .64.2 Requirements of natural stones for rough slabs .74.2.1 General 74.2.2 Denomination .84.2.3 Visual appearance .84.2.4 Apparent density and open porosity .84.2.5 Flexural strength 84.2.6 Other requirements85 Marking, packaging .96 Evaluation of conformity and factory produc
12、tion control .96.1 Evaluation for conformity .96.2 Initial type testing 96.3 Factory production control 10Annex A (informative) Sampling . 12A.1 General . 12A.2 Principles of sampling . 12A.3 Taking bulk samples 12A.4 Preparing a sampling plan . 12A.5 Sampling apparatus . 13A.6 Sampling methods 13A.
13、6.1 General . 13A.6.2 Sampling from quarries . 13A.6.3 Sampling from plants . 14A.6.4 Sampling from buildings 14A.7 Marking, packaging and dispatch of the samples . 14A.8 Sampling report 14Bibliography . 16BS EN 1468:2012EN 1468:2012 (E) 3 Foreword This document (EN 1468:2012) has been prepared by T
14、echnical Committee CEN/TC 246 “Natural stones”, the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2012, and conflicting national standards shall be w
15、ithdrawn at the latest by October 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1468:2003. This Eu
16、ropean Standard is one of a series of standards for requirements of natural stone products which includes the following: EN 1467, Natural stone Rough blocks Requirements EN 1468, Natural stone Rough slabs Requirements EN 1469, Natural stone products Slabs for cladding Requirements EN 12057, Natural
17、stone products Modular tiles Requirements EN 12058, Natural stone products Slabs for floors and stairs Requirements EN 12059, Natural stone products Dimensional stone work Requirements Other standards on natural stone are produced by a) CEN/TC 178 1) EN 1341, Slabs of natural stone for external pavi
18、ng Requirements and test methods 2) EN 1342, Setts of natural stone for external paving Requirements and test methods 3) EN 1343, Kerbs of natural stone for external paving Requirements and test methods b) CEN/TC 128 1) EN 12326-1, Slate and stone products for discontinuous roofing and cladding Part
19、 1: Product specification 2) EN 12326-2, Slate and stone products for discontinuous roofing and cladding Part 2: Methods of test for slate and carbonate slate c) CEN/TC 125 1) EN 771-6, Specification for masonry units Part 6: Natural stone masonry units Other standards are relevant to stone aggregat
20、es for concrete, roads, railways and armourstone. BS EN 1468:2012EN 1468:2012 (E) 4 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Rep
21、ublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1468:2012EN 1468:2012 (E) 5 1 Scope
22、This European Standard specifies requirements for rough slabs of natural stone from which products for use in buildings or commemorative stones and other similar applications are made. It does not cover artificially agglomerated stony material nor installation. 2 Normative references The following d
23、ocuments, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1936, Natural stone
24、 test methods - Determination of real density and apparent density, and of total and open porosity EN 12372, Natural stone test methods Determination of flexural strength under concentrated load EN 12407, Natural stone test methods Petrographic examination EN 12440, Natural stone Denomination criter
25、ia EN 12670:2001, Natural stone Terminology EN 13161, Natural stone test methods Determination of flexural strength under constant moment EN 13373, Natural stone test methods Determination of geometric characteristics on units NOTE Besides the European Standards for test methods mentioned in this cl
26、ause there exist further standards which can be used for scientific examinations, but which are not relevant for the application in practice according to this European Standard. 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12670:2001 and the follow
27、ing apply. 3.1 commercial size of a rough slab size obtained by reducing net length and net width by 0,03 m 3.2 dimensions of a rough slab length, width (height) and thickness of a rough slab Note 1 to entry: Dimensions are given in metres to two decimals places for length and width, and in millimet
28、res for thickness. 3.3 gross size of a rough slab size corresponding to the minimum circumscribed rectangle 3.4 net size of a rough slab size corresponding to the greatest inscribed rectangle BS EN 1468:2012EN 1468:2012 (E) 6 3.5 rough slabs flat surface semi-finished product with unfinished edges o
29、btained by sawing or splitting from a rough block 4 Requirements 4.1 Requirements for geometric characteristics 4.1.1 Measurement criteria All measurements shall be carried out in accordance with EN 13373 and indicated in metres to two decimals places. 4.1.2 Requirements for thickness The thickness
30、shall not deviate from the nominal thickness by more than the tolerances given in Table 1. Table 1 Tolerances of the nominal thickness Nominal thickness Tolerance mm up to 15 1,5 mm more than 15 up to and including 30 10 % more than 30 up to and including 80 3 mm more than 80 5 mm Stricter tolerance
31、s may be declared by the manufacturer. For natural stone cleft/riven faces, the tolerances on thickness shall be declared by the manufacturer. 4.1.3 Requirements for flatness The deviation of the surface from flatness shall not exceed 0,2 % of the slab length and shall not exceed 3 mm. For split rou
32、gh slabs, the tolerance on flatness shall be declared by the manufacturer. Stricter tolerances may also be declared by the manufacturer. 4.1.4 Requirements for surface finish 4.1.4.1 General Surface finishes shall be carried out at least to the edges of the commercial size of rough slabs. The surfac
33、e finishing of some types of stones may typically involve the use of patching, fillers or other similar products for natural holes, faults or cracks, and this is to be considered as part of the normal processing. In such cases, the type of treatment, as well as the type and nature of additional mate
34、rials, shall be declared. The surface profile obtained by splitting shall be within declared tolerances. BS EN 1468:2012EN 1468:2012 (E) 7 4.1.4.2 Requirements for surfaces obtained by sawing Grooves caused by sawing operations shall not have a depth greater than 2 mm. If the rough slab is to be pol
35、ished, the grooves depth shall not be greater than 1 mm. Deviation from flatness shall be in accordance with 4.1.3. 4.1.4.3 Requirements for surfaces after surface finishing Surfaces shall have a regular appearance as a function of the finishing process, and shall be worked to meet the specified fin
36、ish (e.g. making reference to samples, see 4.2.2) on all exposed surfaces. NOTE 1 Surfaces obtained by means of hammer type tools are, for example: bush hammered surfaces (see EN 12670:2001, Definition 2.3.8 1); trimmed surfaces: finish obtained by using a pointed chisel and mallet or a grooving mac
37、hine; striated surfaces: finish obtained by using a claw chisel (percussion tool for roughening a surface, with the cutting end covered by several teeth of various sizes) or a ruling machine. NOTE 2 Surfaces obtained by other finishing operations are, for example: flamed finish (see EN 12670:2001, D
38、efinition 2.3.22 2); sand blasted finish (see EN 12670:2001, Definition 2.3.46 3); water jet streamed finish: a matt textured surface finish, accomplished by exposing the surface to a steady jet of water under pressure; machine tooled finish (see EN 12670:2001, Definition 2.3.54 4); riven cut finish
39、: rugged surface produced by splitting stone with a guillotine or chisel. 4.2 Requirements of natural stones for rough slabs 4.2.1 General The following characteristics shall be declared where requested by this European Standard, or with reference to use conditions. The declared values shall be repr
40、esentative of the current production. However, due to natural variations of the stone materials, deviations from the declared values may occur. Expected deviations shall be indicated by the manufacturer. 1) EN 12670:2001, Definition 2.3.8: Finish obtained by using a bush hammer (percussion tool for
41、roughening a surface, with a square head and with few pyramidal percussion teeth or points) or a bush hammering machine (machine consisting of feed rolls and an overhanging beam, supporting a pneumatic bush hammer). 2) EN 12670:2001, Definition 2.3.22: Surface texture obtained by thermal treatment o
42、f the stone using a high temperature flame. 3) EN 12670:2001, Definition 2.3.46: A matt finishing resulting from the impact of the sand or other abrasive grains expelled by a sand jet. 4) In EN 12670:2001, Definition 2.3.54, this term has two different meanings: a) finish resulting from the mechanic
43、al surface treatment with tools; b) dressed finish clearly showing tool marks. BS EN 1468:2012EN 1468:2012 (E) 8 Rough slabs of natural stones may be back reinforced and glued by artificial resins. The possibility that stone processing is likely to change the characteristics of the raw material (e.g
44、. in consequence of strong bush hammering of the surface, of flaming or heating, of back reinforcing the slabs, or because of the use of artificial patching, fillers or other similar products for natural holes, faults, cracks and similar) shall be considered when determining the characteristics requ
45、ested by this European Standard. 4.2.2 Denomination The denomination (traditional name, petrological family, typical colour and place of origin) shall always be declared in accordance with EN 12440. NOTE The place of origin can be given by GPS coordinates. The petrographic definition shall be determ
46、ined in accordance with EN 12407. 4.2.3 Visual appearance This characteristic shall be declared upon request. The colour, veining, texture, etc. of the stone shall be identified visually (for example by a polished reference sample). The reference sample shall be provided by the supplier. Any visual
47、variations, for example inclusions and veins, are permissible, provided that they are characteristic of the relevant type of natural stone and provided that they do not adversely affect the performances of the slabs. Visible cracks and fissures shall be marked on rough slabs. 4.2.4 Apparent density
48、and open porosity This characteristic shall always be declared. The apparent density and open porosity shall be determined using the test method in EN 1936 and the results expressed accordingly. 4.2.5 Flexural strength This characteristic shall always be declared. The flexural strength shall be dete
49、rmined using the test method in EN 12372 or EN 13161, and the mean value, lower expected value and standard deviation shall be declared. 4.2.6 Other requirements Where required, for example when the derived product is to be used for a specific purpose, additional tests may be requested in accordance with relevant product standard (see EN 1469 1, EN 12057 2, EN 12058 3, etc.). BS EN 1468:2012EN 1468:2012 (E) 9 5
