1、BRITISH STANDARD Ceramic tiles Part 5. Determination of impact resistance by measurement of coefficient of restitution The European Standard EN IS0 105455 : 1997 has the status of a British Standard ICs 91.100.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW 3s EN IS0 10545-
2、5 : 1998 ncorpowting Tmhnical :orrigendurn 1 : 1996 STD-ES1 ES EN IS0 10545-5-ENGL 1998 lb24bb7 0b998b5 048 Amd.No. BS EN IS0 10545-5 : 1998 Date Text affected National foreword This British Standard is the English language version of EN IS0 105455 : 1997 Ceramic ti - present to the responsible inte
3、rnationailEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to
4、its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standars Correspondence Index, or by using the Find facility of the BSI Stand
5、ards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii and iii, a blank page,
6、 pages 1 to 7 and back cover. This British Standard, having been prepared under the diredon of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 March 1998 O BSI 1998 ISBN O 680 28993 1 EUROPEANSTANDARD NORME EUROPENNE EUROPISCHE NORM
7、EN IS0 10545-5 September 1997 ICs 91.100 Descriptors: see IS0 document English version Ceramic tiles - Part 5: Determination of impact resistance by measurement of coefficient of restitution (IS0 10545-5: 1996, including Technical Corrigendum 1 : 1996) Carreaux et dalles cramiques - Partie 5: Dtermi
8、nation de la rsistance au choc par mesurage du coefficient de restitution ( I SO 10545 -5: 1996, Rectificatif Technique 1:1996 inclus) Keramische Fliesen und Platten - Teil 5: Bestimning der Schlagfestigkeit durch Messung des Rckprallkoeffizienten (IS0 10545-5:1996, cinrchlieBlich Technische Korrekt
9、ur 1:1996) * * m This European Standard was approved by CEN on 1997-OB-U. CEN members are bound to cwiply with the CENKENELEC Internal Regulations uhich stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliogra
10、phical references concerning such national standards nay be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CE
11、N nmibcr into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgiun, Czech Republic, Demrk, Finland, France, Germany, Greece, Iceland, Ireland, 1 taly, Luxembourg, Netherlands, Norway,
12、Portugal, Spain, Sweden, Suitzerland and United Kingdom. European Camnittee for standardization Comit EuropCcn de Normalisation Europisches Komitee fr Norm Central Secretariat: rue de Stassart,36 8-1050 russels O 1997 CEN - All rights of exploitation in any form and by any means reserved uorlduide f
13、or CEN national Members. Ref. No. EN IS0 10545-5:1997 E STD-BSI BS EN IS0 10545-5-ENGL 1778 lb24bb7 Ob978b7 710 m EN IS0 10545-5 : 1997 Foreword The text of the International Standard from Technical Cornmittee ISOTTC 189 “Ceramic tiles“ of the International Organization for Standardization (ISO) has
14、 been taken over as an European Standard by Technical Committee CEN/TC 67 “Ceramic tiles“, the secretariat of which is held by UNI. EN IS0 10545 consists of the following parts, under the common title, “Ceramic tiles“: - Part 1 : Sampling and basis for acceptance - Part 2: Determination of dimension
15、s and surface quality - Part 3: Determination of water absorption, apparent porosity, apparent relative density and bulk density - Part 4: Determination of modulus of rupture and breaking strength - Part 5: Determination of impact resistance by measurement of coefficient of restitution - Part 6: Det
16、ermination of resistance to deep abrasion for unglazed tiles - Pan 7: Determination of resistance to surface abrasion for glazed tiles - Part 8: Determination of linear thermal expansion - Part 9: Determination of resistance to thermal shock - Part 1 O: Determination of moisture expansion - Part 11:
17、 Determination of crazing resistance for glazed tiles - Part 12: Determination of frost resistance - Part 13: Determination of chemical resistance - Part 14: Determination of resistance to stains - Part 15: Determination of lead and cadmium given off by glazed tiles - Part 16: Determination of small
18、 colour differences - Part 17: Determination of coefficient of friction This European Standard shall be given the status of a narional standard, either by publication of an identical text or by endorsement, at the latest by March 1998, and conflicting national standards shall be withdrawn at the lat
19、est by March 1998. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Nether
20、lands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 10545-5: 1 996, including Technical Corrigendum 1 : 1 996 has been approved by CEN as a European Standard without any modification. O BSI 1998 STD.BSI BS EN IS0 1
21、0545-5-ENGL 1778 Lb24667 Ub77b 857 EN IS0 10545-5 : 1997 I NTERNATIONAL STANDARD IS0 10545-5 First edition 1996-04-01 Ceramic tiles - Part 5: Determination of impact resistance by measurement of coefficient of restitution Carreaux et dalles cramiques - Partie 5: Dtermination de la rsistance au choc
22、par mesurage du coefficient de restitution Reference number IS0 105455:1996(E) STD-BSI BS EN IS0 10545-5-ENGL 1998 W 1b24bb7 Ob778b9 773 EN IS0 10545-5 : 1997 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies).
23、 The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and nong
24、overnmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies fo
25、r voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 10545-5 was prepared by Technical Committee ISO/TC 189, Ceramic tile. IS0 10545 consists of the following parts, under the general title Ceramic tiles
26、: - Part 1: Sampling and basis for acceptance - Part 2: Determination of dimensions and surface quality - Part 3: Determination of water absorption, apparent porosity, appar- - Part 4: Determination of modulus of rupture and breaking strength ent relative density and bulk density - Part 5: Determina
27、tion of impact resistance by measurement of co- efficient of restitution - Part 6: Determination of resistance to deep abrasion for unglazed tiles - Part 7: Determination of resistance to surface abrasion for glazed tiles - Pari 8: Determination of linear thermal expansion hrctlptorr: ceramics, tile
28、s. tests, impact tests, determination, shock resistance, test equipment. i STD.BS1 BS EN IS0 10545-5-ENGL 1778 m Lb24bb7 Ob79870 405 m EN IS0 10545-5 : 1997 - Part 9: Determination of resistance to thermal shock - Part 1 O: Determination of moisture expansion - Part 1 1: Determination of crazing res
29、istance for glazed tiles - Part 72: Determination of frost resistance - Part 73: Determination of chemical resistance - Pan 14: Determination of resistance to stains - Pan 75: Determination of lead and cadmium given off by glazed tiles - Part 16: Determination of small colour differences - Part 17:
30、Determination of coefficient of friction Annex A of this part of IS0 10545 is for information only. * * m - STD.BSI BS EN IS0 10545-5-ENGL 1776 1b24bb9 Ob77671 341 EN IS0 10545-5 : 1997 Ceramic tiles - Part 5: Determination of impact resistance by measurement of coefficient of restitution 1 Scope Th
31、is part of IS0 10545 specifies a test method for determining the impact resistance of ceramic tiles by measuring the coefficient of restitution. 2 Definition For the purpose of this part of IS0 10545, the fol- lowing definition applies. 2.1 coefficient of restitution between two im- pacting bodies,
32、e: Relative velocity of departure div- ided by the relative velocity of approach. 4.2 Ball-release apparatus, (see figure 1 ), consist- ing of a heavy steel base set on levelling screws with a vertical steel bar to which is attached an electromagnet, a guide tube and a test unit support. The test un
33、it is clamped firmly in a position so that when the steel ball drops it impinges on the centre of the horizontal tile surface. A clamping device is shown in figure 1, but any suitable system may be used. 4.3 Electronic timing device (optional), which, by means of a microphone, measures the time inte
34、rval between the first and second impacts when the ball is dropped onto the test specimen. 5 Test specimens 3 Principle 5.1 Number of test specimens Determination of the coefficient of restitution by dropping a steel ball from a fixed height onto the test specimen and measuring the height of rebound
35、. 4 Apparatus 4.1 Chrome steel ball, of diameter (19 f 0,05) mm. A minimum of five pieces in dimensions 75 mm x 75 mm cut from five tiles. Tiles with facial dimensions less than 75 mm may be used. 5.2 Brief description of test units The test units consist of test specimens fixed to ma- ture concrete
36、 blocks by means of rigid epoxide resin adhesive. 1 STD-BSI BS EN IS0 10545-5-ENGL 1798 m 1b2qbb7 Ob77872 288 m EN IS0 10545-5 : 1997 I I I I I I I I I I I I l Guide tube Y- 5.3 Concrete blocks I I I I I I I I I I I I I I Timing equipment Detector X Tile- u - 1 Epoxide resin adhesive Figure 1 - Ball
37、-release apparatus other aggregates may be used and then the surface water absorption test may not be appropriate. Concrete blocks or slabs may be made by adding one part by mass of Portland cement to 4.5 to 5.5 parts by mass of aggregate. The aggregate shall be gravel sand of O to 8 mm particle siz
38、e with a continuous grading curve between the limits A and B in figure2. The total fines of particle size below 0,125 mm in the mix of concrete, including Portland cement, should be about 500 kg per cubic metre. The dense concrete blocks shall be of approximate dimensions 75 mm x 75 mm x 50 mm and p
39、repared in moulds of this size, or alternatively cut from large concrete slabs. The following method describes the preparation of dense concrete blocks made from gravel/sand, but 2 * * m STD.BSI BS EN IS0 105q5-5-ENGL 1778 Lb24bb7 0679873 114 D EN IS0 10545-5 : 1997 100- 90- 80- 70- E- E 60- I N- Y)
40、 L QI .- c 50- 3 40- 30- 20- 10- I/ O CurveA CurveB O I I r I I I I I 1 0,125 0.25 0;s 1.0 2.0 4,O 8.0 Nominal aperture size. rnm Figure 2 - Grading curves for gravel sand of maximum particle size 8 mm The waterlcement ratio shall be 0.5. Thoroughly mix the constituents in a mechanical mixer and tro
41、wel into moulds of the required size. Compact for 90 s at 50 Hz on a vibrating table. Condition the concrete slabs for 48 h at (23 f 2) “C and (50 I 5) % relative humidity before removing them from the moulds. Thoroughly rinse off any mould release agent. Throughout the remaining con- ditioning, the
42、 slabs shall be held vertically, leaving gaps between them. Immerse in water at (20 f 2) “C for 6 d, then in air at (23 f 2) “C and (50 5) % relative humidity for 21 d. The assembly face of the concrete shall have an absorption of sur- face water after 4 h in the range of 0,5 cm3 to 1,5 cm3 when thr
43、ee specimens are tested in accord- ance with the method shown in annex A and figureA.l. Blocks subsequently cut from concrete slabs by wet methods require a minimum drying period of 24 h at (23 f 2) “C and (50 f 5) % relative humidity before assembly in test units. 5.4 Epoxide resin adhesive The adh
44、esive shall not contain ingredients which in- crease flexibility. A suitable adhesive consists of 2 parts by mass of an epoxide resin, which is a reaction product of epichlorhydrin and diphenol isopropane and one part 3 by mass of a curing agent which is an activated am- ine. Pure silica filler of a
45、verage particle size 5,5 pm, measured by the Coulter Counter or other similar methods, is thoroughly mixed with the other constit- uents in a proportion which is just sufficient to form a mixture that does not flow. 5.5 Assembly of test units Spread epoxide resin adhesive in a layer about 2 mm thick
46、 over the upper surface of a mature concrete block in a uniform layer. Place three steel or plastics spacer pegs, of diameter 1,5 mm, in the centre of three of the sides so that each peg projects enough to allow it to be removed later. Press a test specimen, with the proper face upwards, into the ad
47、hesive and scrape off excess adhesive from the sides before gently removing the three spacer pegs. Allow to stand at a temperature of (23 f 2) C and at (50 f 5) % relative humidity for 3 d prior to testing. If tiles of less than 75 mm x 75 rnm facial dimensions are to be tested, place one tile so th
48、at its centre co- incides with the centre of the surface of the block. Use cut pieces of tile to complete the 75 mm x 75 mm area. 6 Procedure Repeat the whole procedure for the other test units. 7 Expression of resuits For a ball impacting a horizontal static surface, the coefficient of restitution
49、(e) is calculated using the equation where v u is the velocity of departure (rebound); is the velocity of approach. Thus where m is the mass, in grams, of the ball; i+ g is the acceleration due to gravity is the height of rebound, in centimetres; (= 981 cm/s2). 2 mu 2 - Adjust the ball-release apparatus (4.2) by means of the the test unit under the electromagnet so that a steel ball (4.1) released from the electromagnet will fall onto the centre of a test unit clamped in position. Place a test unit in the support with the proper f
