1、BRITISH STANDARDBS EN 14840:2005Joint fillers and sealants Test methods for preformed joint sealsThe European Standard EN 14840:2005 has the status of a British StandardICS 93.080.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g
2、36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14840:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 12 December 2005 BSI 12 December 2005ISBN 0 580 47371 6National forewordThis British Standard is
3、 the official English language version of EN 14840:2005. The UK participation in its preparation was entrusted by Technical Committee B/510, Road materials, to Subcommittee B/510/3, Materials for concrete roads, which has the responsibility to: aid enquirers to understand the text; present to the re
4、sponsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this subcommittee can be obtained on r
5、equest to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI
6、Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pages
7、This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STAN
8、DARDNORME EUROPENNEEUROPISCHE NORMEN 14840October 2005ICS 93.080.20English VersionJoint fillers and sealants - Test methods for preformed jointsealsProduits dobturation et de scellement de joints - Mthodesdessai pour les joints dtanchit moulsFugeneinlagen und Fllstoffe - Prfverfahren frvorgeformte F
9、ugenprofileThis European Standard was approved by CEN on 16 August 2005.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 bibliograph
10、ical references concerning such nationalstandards may be obtained on application to the Central Secretariat 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 me
11、mber into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithu
12、ania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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 2005 CEN All right
13、s of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14840:2005: EEN 14840:2005 (E) 2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Test methods.4 4.1 Tensile strength and elongation at break4 4.2 Compressio
14、n set in air .4 4.2.1 General 4 4.2.2 Compression set at 70 C.5 4.2.3 Compression set at low temperature (25 C) 5 4.3 Accelerated ageing in air5 4.4 Stress relaxation in compression5 4.5 Recovery at low and high temperatures .5 4.5.1 Test principle.5 4.5.2 Apparatus and materials 5 4.5.3 Procedure 6
15、 4.5.4 Calculation and expression of result.6 4.5.5 Precision6 4.6 Ozone resistance 6 4.7 Protection against over-extension.6 4.8 Function testing for cold climate areas.7 4.8.1 General 7 4.8.2 Apparatus 7 4.8.3 Test specimens .8 4.8.4 Procedure 8 4.8.5 Calculation and expression of result.10 4.8.6
16、Precision10 5 Test report .11 Bibliography.12 EN 14840:2005 (E) 3 Foreword This European Standard (EN 14840:2005) has been prepared by Technical Committee CEN/TC 227 “Road materials”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, ei
17、ther by publication of an identical text or by endorsement, at the latest by April 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to
18、implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kin
19、gdom. EN 14840:2005 (E) 4 1 Scope This European Standard specifies the test methods for preformed joint seals made of vulcanised rubber for use in concrete pavements. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated
20、references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 26927:1990, Building construction Jointing products Sealants Vocabulary (ISO 6927:1981) ISO 37, Rubber, vulcanised or thermoplastic Determination o
21、f tensile stress-strain properties ISO 188, Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests ISO 815, Rubber, vulcanised or thermoplastic Determination of compression set at ambient, elevated or low temperatures ISO 1431-1, Rubber, vulcanised or thermoplastic Resist
22、ance to ozone cracking Part 1:Static and dynamic strain testing ISO 3384, Rubber, vulcanised or thermoplastic Determination of stress relaxation in compression at ambient and at elevated temperatures ISO 2285, Rubber, vulcanized or thermoplastic - Determination of tension set under constant elongati
23、on, and of tension set, elongation and creep under constant tensile load ISO 5893, Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) Specification 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given
24、in EN 26927:1990 apply. 4 Test methods 4.1 Tensile strength and elongation at break The tensile strength and elongation at break shall be determined by the method specified in ISO 37. Dumb-bell shaped test pieces of types 1, 2, 3 or 4 shall be used. The test report shall report the type of test piec
25、es used. NOTE Type 2 should be the preferred type. 4.2 Compression set in air 4.2.1 General The measurements shall be carried out if possible in the direction of compression of the seal in service. EN 14840:2005 (E) 5 4.2.2 Compression set at 70 C The compression set shall be determined in accordanc
26、e with ISO 815 at 70 C, using the small type test piece. The duration of the test shall be 24 h. Where the cross section is too small to obtain compression buttons from the product, as an alternative to moulding buttons, the tension set of the product shall be determined using the method specified i
27、n ISO 2285, with a strain of 50 % and shall comply with the same test conditions (except strain) and requirements as for compression set. 4.2.3 Compression set at low temperature (25 C) The compression set shall be determined in accordance with ISO 815 at 25 C, using the small type test piece. 4.3 A
28、ccelerated ageing in air Test pieces prepared for the determination of hardness and for the determination of tensile strength and elongation at break (see 4.1.) shall be aged for 7 days at 70 C in air by the normal oven method specified in ISO 188. 4.4 Stress relaxation in compression The stress rel
29、axation shall be determined by method B of ISO 3384 using pieces of 100 mm length of the preformed joint seal after applying mechanical and thermal conditioning. The preformed joint seals shall be compressed in suitable forms to nominal joint width. Measurements shall be taken after 3 hours, 1 day,
30、3 days, 7 days, 30 days and 100 days at 50 C. The best fit straight line shall be determined by regression analysis using a logarithmic time scale. 4.5 Recovery at low and high temperatures 4.5.1 Test principle Test specimens of the preformed joint seals shall be compressed between two parallel plat
31、es and kept for a defined time at low or high temperatures. After release the degree of recovery is determined. NOTE This procedure allows a quick test to check the profile quality in the case of joint opening. To check the long term behaviour of a profile the stress-relaxation test should be used.
32、4.5.2 Apparatus and materials 4.5.2.1 Compression device, meeting the requirements of ISO 5893, consisting of two parallel, flat, highly polished plates made from chromium-plated or stainless steel or other corrosion-resistant material. The compression plates shall be flat within 0,01 mm. 4.5.2.2 St
33、ainless steel spacers are required to adjust a distance between the compression plates according to the normal joint width in the place of use. 4.5.2.3 Measuring device to measure the dimension of the test piece. 4.5.2.4 Convection type oven, controllable at (70 1) C. 4.5.2.5 Container to maintain a
34、 temperature of (25 2) C. EN 14840:2005 (E) 6 4.5.3 Procedure For each test, 3 segments of the preformed joint seal of 125 mm length shall be compressed in the compression device to the normal joint width in the place of use, using the stainless steel spacers and then stored according to the followi
35、ng test conditions: stored (24 h 15 min) at 25 C, remove the clamp and store the test specimen in the relieved state for (1 h 5 min) at 25 C; stored (72 h 15 min) at 70 C, remove the clamp and store the test specimen in the relieved state for (1 h 5 min) at 23 C. After this time the recovered sectio
36、n width of the test specimen shall be measured using the measuring device. 4.5.4 Calculation and expression of result The recovery shall be calculated as follows: widthsectionoriginal100widthsectionrecovered(%)Recovery= (1) 4.5.5 Precision Estimates of the repeatability and reproducibility of this t
37、est method are not available yet but will be included by amendments when available. 4.6 Ozone resistance The ozone resistance is determined by the method specified in ISO 1431-1 under the conditions set out below: Ozone concentration, (50 5) pphm; Temperature, (40 1) C; Pretension (conditioning), (7
38、2 2) h; Exposure time, (48 1) h; Elongation for 36 to 75 IRHD, (20 2) %; Elongation for 76 to 85 IRHD, (15 2) %; Relative humidity, (55 5) %. 4.7 Protection against over-extension A piece of 1 000 mm length with a free length of 500 mm between clamps shall be extended at 50 mm/min at room temperatur
39、e until first break of the fibre for protection against over-extension. The elongation at first effect (change in the slope of the curve) of fibre, the elongation at 300 N tensile force and the tensile force of first break of fibre are taken out of the measurement. NOTE Preformed joint seals contain
40、 a glass fibre to avoid over-extension of the profile during installation. The efficiency of this glass fibre is controlled by extending the profile in a tensile testing machine until first break of the fibre. EN 14840:2005 (E) 7 Key Y tensile force (N) X elongation (%) 1 tensile force at first brea
41、k of fibre 2 first effect of fibre 3 elongation at 300 N Figure 1 Example of a tensile force diagram 4.8 Function testing for cold climate areas 4.8.1 General This test is to measure the ability of preformed joint seals to retain their elastic properties at low temperatures and after prolonged compr
42、ession at high temperatures at constant strain. 4.8.2 Apparatus The testing apparatus (see Figure 2) shall consist of a climatic chamber capable of regulating the temperature between +30 C and 30 C with the accuracy of 2 C. Inside the chamber, a tensile and compression test rig shall be placed havin
43、g at least three pairs of plates for testing the three specimens simultaneously. The plates-ends shall consist of parallel, flat, highly polished stainless steel plates, between the faces of which the test specimens are compressed. The plates shall be sufficiently rigid to withstand the stress witho
44、ut bending and of sufficient size to ensure that the compressed test specimen is within the area of the plates. The test rig shall be motor driven without significant slip or backlash, giving a constant rate of movement. The rate of movement shall be 0,60 mm/h 10 %. Three load cells shall be connect
45、ed to an electronic data collection device for measuring and recording of the compression force with the accuracy of 2 % of the minimum compression force applied to each system. EN 14840:2005 (E) 8 Key 1 climatic chamber capable of regulating the temperature between +30 C and 30 C 2 load cells conne
46、cted to an electronic data collection device for measuring and recording of the compression force 3 stationary plates 4 movable plates 5 test specimens Figure 2 Principle sketch of the testing apparatus 4.8.3 Test specimens For each test, at least three test specimens shall be cut from a preformed j
47、oint seal. The preferable lengths of the test specimens shall be (70 1) mm or (100 1) mm. 4.8.4 Procedure 4.8.4.1 Function test The specimens are placed between the plates in the direction of compression of the seal in service and compressed to their nominal joint width (for example 8 mm) 2 % as spe
48、cified for the product by the manufacturer. The assembly shall then be introduced into an oven which shall operate at (70 1) C. The duration of ageing shall be 30 days. After ageing the function test shall start at (11 1) C with the gap between the plates equal to the nominal joint width and settled
49、 as zero change of joint width. The movement of the plates shall be synchronised with the change of the temperature in such a way that a width of 80 % of the normal width in the place of use is achieved at the highest temperature of +25 C, and the maximum width of 150 % is achieved at the lowest temperature of 25 C (see Figure 3). EN 14840:2005 (E) 9 Joint compression is the increment of joint chamber width, divided by nominal joint chamber width i
