1、BRITISH STANDARDBS EN 13755:2008Natural stone test methods Determination of water absorption at atmospheric pressureICS 73.020; 91.100.15g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g
2、38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 13755:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2008 BSI 2008ISBN 978 0 580 58537 1National forewordThis British Standard is the UK implementation of EN 13755:2008. It supersedes BS
3、 EN 13755:2002 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/545, Natural stone.A list of organizations represented on this committee can be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 provisi
4、ons of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13755April 2008ICS 73.020; 91.100.15 Supe
5、rsedes EN 13755:2001 English VersionNatural stone test methods - Determination of water absorptionat atmospheric pressureMthodes dessai pour pierres naturelles - Dterminationde labsorption deau la pression atmosphriquePrfverfahren fr Naturstein - Bestimmung derWasseraufnahme unter atmosphrischem Dru
6、ckThis European Standard was approved by CEN on 28 March 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical refer
7、ences concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member int
8、o its own language and notified to the CEN Management Centre has the same status as theofficial 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, L
9、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008
10、CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13755:2008: EEN 13755:2008 (E) 2 Contents Page Foreword3 1 Scope 5 2 Normative references 5 3 Principle5 4 Symbols 5 5 Apparatus .5 6 Preparation of the specimens 5 6.1 Sampling.5 6.2 T
11、est specimens5 6.3 Drying the specimens .6 7 Test procedure.6 8 Expression of results 6 9 Test report 7 Bibliography 8 BS EN 13755:2008EN 13755:2008 (E) 3 Foreword This document (EN 13755:2008) has been prepared by Technical Committee CEN/TC 246 “Natural stones”, the secretariat of which is held by
12、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 2008, and conflicting national standards shall be withdrawn at the latest by October 2008. Attention is drawn to the possibility that s
13、ome 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 13755:2001. This European Standard is one of the series of European Standards for tests on natural sto
14、ne. Test methods for natural stone consist of the following parts: EN 1925, Natural stone test methods Determination of water absorption coefficient by capillarity EN 1926, Natural stone test methods Determination of uniaxial compressive strength EN 1936, Natural stone test methods Determination of
15、real density and apparent density, and of total and open porosity EN 12370, Natural stone test methods Determination of resistance to salt crystallisation EN 12371, Natural stone test methods Determination of frost resistance EN 12372, Natural stone test methods Determination of flexural strength un
16、der concentrated load EN 12407, Natural stone test methods Petrographic examination EN 13161, Natural stone test methods Determination of flexural strength under constant moment EN 13364, Natural stone test methods Determination of the breaking load at dowel hole EN 13373, Natural stone test methods
17、 Determination of geometric characteristics on units EN 13755, Natural stone test methods Determination of water absorption at atmospheric pressure EN 13919, Natural stone test methods Determination of resistance to ageing by SO2action in the presence of humidity EN 14066, Natural stone test methods
18、 Determination of resistance to ageing by thermal shock EN 14146, Natural stone test methods Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency) EN 14147, Natural stone test methods Determination of resistance to ageing by salt mist EN 14157, Natural
19、 stone test methods Determination of abrasion resistance EN 14158, Natural stone test methods Determination of rupture energy BS EN 13755:2008EN 13755:2008 (E) 4 EN 14205, Natural stone test methods Determination of Knoop hardness EN 14231, Natural stone test methods Determination of the slip resist
20、ance by means of the pendulum tester EN 14579, Natural stone test methods Determination of sound speed propagation EN 14580, Natural stone test methods Determination of static elastic modulus EN 14581, Natural stone test methods Determination of linear thermal expansion coefficient According to CEN/
21、CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lu
22、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 13755:2008EN 13755:2008 (E) 5 1 Scope This European Standard specifies a method for determining the water absorption of natural stone see EN 12670 for terminology
23、 and EN 12440 for denomination - by immersion in water at atmospheric pressure. 2 Normative references Not applicable. 3 Principle After drying to a constant mass, each specimen is weighed and then immersed in water at atmospheric pressure for a specified period of time. Determination of the water a
24、bsorption at atmospheric pressure, expressed as a percentage, by the ratio of the mass of the saturated specimen (obtained at constant mass) to the mass of the dry specimen. 4 Symbols md mass of the dry specimen, in grams; misuccessive masses of the specimen during testing, in grams; msmass of the s
25、aturated specimen (after immersion in water until constant mass is reached), in grams; Abwater absorption at atmospheric pressure, expressed as a percentage. 5 Apparatus 5.1 A tank with flat base comprising small non-oxidising and non-absorbent supports for the specimens. 5.2 A ventilated oven which
26、 can maintain a temperature of (70 5) C. 5.3 A weighing instrument with an accuracy of 0,01 g. 6 Preparation of the specimens 6.1 Sampling The sampling is not under the responsibility of the test laboratory except where especially requested. At least six specimens shall be selected from a homogenous
27、 batch. 6.2 Test specimens The test specimens shall have the form of a cylinder, cube or prism (70 5) mm or (50 5) mm and shall be obtained by diamond sawing or coring. Their apparent volume calculated by geometrical measurements shall be at least 60 ml. In addition, the surface area to volume ratio
28、 shall be between 0,08 mm-1and 0,20 mm-1. BS EN 13755:2008EN 13755:2008 (E) 6 NOTE The specimens prepared for the determination of compressive or flexural strength can be used if they satisfy the surface/volume ratio. 6.3 Drying the specimens The test specimens are to be dried to constant mass at a
29、temperature of (70 5) C. Constant mass is reached when the difference between two successive weighings at an interval of (24 2) h is not greater than 0,1 % of the first of the two masses. The specimens shall be kept in a desiccator until room temperature (20 5) C is attained. 7 Test procedure Weigh
30、the specimens after drying (md) to an accuracy of 0,01 g. Place the specimens in the tank on the supports provided. Each specimen needs to be at least 15 mm from adjacent specimens. Then add tap water at (20 10) C up to half the height of the specimens (time t0). At time t0+ (60 5) min add tap water
31、 until the level of the water reaches three-quarter of the height of the specimens. At time t0+ (120 5) min add tap water until the specimens are completely immersed to a depth of (25 5) mm of water. At time t0+ (48 2) h the specimens are taken out of the water, quickly wiped with a damp cloth and t
32、hen weighed within 1 min to an accuracy of 0,01 g (mi). Immerse the specimens again in water and continue the test. Every (24 2) h the specimens are taken out of the water, quickly wiped with a damp cloth and then weighed within 1 min to an accuracy of 0,01 g. Note the successive masses of the speci
33、mens (mi). Continue the test up to constant mass of the specimens. Constant mass is reached when the difference between two successive weighings is not greater than 0,1 % of the first of the two masses. The result of the last weighing is the mass of the saturated specimen (ms). 8 Expression of resul
34、ts The water absorption at atmospheric pressure Ab of each specimen is calculated by the equation: 100ddsb=mmmA The result shall be expressed as a percentage to the nearest 0,1 %. BS EN 13755:2008EN 13755:2008 (E) 7 9 Test report The test report shall contain the following information: a) unique ide
35、ntification number of the report; b) the number, title and date of issue of this European Standard, i.e. EN 13755:2008; c) the name and address of the test laboratory and the address where the test was carried out if different from the test laboratory; d) the name and address of the client; e) it is
36、 the responsibility of the client to supply the following information: the petrographic name of the stone; the commercial name of the stone; the country and region of extraction; the name of the supplier; the direction of any existing plane of anisotropy (if relevant to the test) to be clearly indic
37、ated on the sample or on each specimen by means of two parallel lines; the name of the person or organisation which carried out the sampling; the surface finish of the specimen (if relevant to the test); f) the date of delivery of the sample or of the specimens; g) the date when the specimens were p
38、repared (if relevant) and the date of testing; h) the number of specimens in the sample; i) the dimensions of the specimens; j) for each specimen the water absorption at atmospheric pressure to the nearest 0,1 %; k) the arithmetic mean of the individual values of water absorption at atmospheric pres
39、sure expressed to the nearest 0,1 %; l) all deviations from the standard and their justification; m) remarks. The test report shall contain the signature(s) and role(s) of the responsible(s) for the testing and the date of issue of the report. It shall also state that the report shall not be partial
40、ly reproduced without the written consent of the test laboratory. BS EN 13755:2008EN 13755:2008 (E) 8 Bibliography 1 EN 12440, Natural stone Denomination criteria 2 EN 12670, Natural stone Terminology BS EN 13755:2008blankBS EN 13755:2008BSI Group Headquarters389 Chiswick High Road,London W4 4AL, UK
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