1、September 2015 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).
2、ICS 75.140; 91.100.50!%E$“2349201www.din.deDDIN EN 1426Bitumen and bituminous binders Determination of needle penetration;English version EN 1426:2015,English translation of DIN EN 1426:2015-09Bitumen und bitumenhaltige Bindemittel Bestimmung der Nadelpenetration;Englische Fassung EN 1426:2015,Engli
3、sche bersetzung von DIN EN 1426:2015-09Bitumes et liants bitumineux Dtermination de la pntrabilit laiguille;Version anglaise EN 1426:2015,Traduction anglaise de DIN EN 1426:2015-09SupersedesDIN EN 1426:2007-06www.beuth.deDocument comprises 16 pagesIn case of doubt, the German-language original shall
4、 be considered authoritative.08.15 DIN EN 1426:2015-09 2 A comma is used as the decimal marker. National foreword This document (EN 1426:2015) has been prepared by Technical Committee CEN/TC 336 “Bituminous binders” (Secretariat: AFNOR, France). The responsible German bodies involved in its preparat
5、ion were the DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing) and the DIN-Normenausschuss Bauwesen (DIN Standards Committee Building and Civil Engineering), Joint Committee NA 062-03-32 GA Bitumen; Prfverfahren und Anforderungen fr die Bindemittel. Amendments This stand
6、ard differs from DIN EN 1426:2007-06 as follows: a) Annex A is for information only; b) Subclause 5.7 “Temperature measuring device” has been revised; calibration of thermometers using the reference mercury stem thermometer is no longer necessary; c) the standard has been editorially revised. Previo
7、us editions DIN 1995: 1929, 1934, 1941-11, 1960x-02, 1980-12 DIN 52010: 1980-12, 1983-12 DIN EN 1426: 1999-12, 2007-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1426 July 2015 ICS 75.140; 91.100.50 Supersedes EN 1426:2007English Version Bitumen and bituminous binders - Determination of ne
8、edle penetration Bitumes et liants bitumineux - Dtermination de la pntrabilit laiguille Bitumen und bitumenhaltige Bindemittel - Bestimmung der Nadelpenetration This European Standard was approved by CEN on 27 May 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
9、stipulate the conditions 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 Europ
10、ean Standard exists 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-CENELEC Management Centre has the same status as the official versions. CEN members are
11、 the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Rom
12、ania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and b
13、y any means reserved worldwide for CEN national Members. Ref. No. EN 1426:2015 EEN 1426:2015 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 4 5 Apparatus .5 6 Sampling .7 7 Procedure .8 8 Expression of results 9 9 Precision 10 10 Test report
14、. 10 Annex A (informative) Characteristics of thermometers 13 Bibliography . 14 DIN EN 1426:2015-09 EN 1426:2015 (E) 3 Foreword This document (EN 1426:2015) has been prepared by Technical Committee CEN/TC 336 “Bituminous binders”, the secretariat of which is held by AFNOR. This document supersedes E
15、N 1426:2007. 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 January 2016, and conflicting national standards shall be withdrawn at the latest by January 2016. Attention is drawn to the possibilit
16、y 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. The major changes to the standard at this revision have been: the normative reference to mercury thermometers has been del
17、eted (see 5.7 and Annex A) and Table 1 and the description of 6.4 have been clarified and improved. Apart from this various smaller adjustments have been made. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement th
18、is European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovak
19、ia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1426:2015-09 EN 1426:2015 (E) 4 1 Scope This European Standard specifies a method for determining the consistency of bitumen and bituminous binders. Normal procedure is described for penetrations up to (330 0,1) mm, but
20、for penetrations above this value, up to (500 0,1) mm, different operating parameters are necessary. WARNING Use of this European Standard may involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use.
21、 It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2 Normative references The following documents, in whole or in part, are normatively referenced in this documen
22、t 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 58, Bitumen and bituminous binders - Sampling bituminous binders EN 1425, Bitumen and bitumi
23、nous binders - Characterization of perceptible properties EN 1427, Bitumen and bituminous binders - Determination of the softening point - Ring and Ball method EN 10088-3, Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright produ
24、cts of corrosion resisting steels for general purposes EN 12594, Bitumen and bituminous binders - Preparation of test samples EN 12597, Bitumen and bituminous binders - Terminology EN ISO 6508-1, Metallic materials - Rockwell hardness test - Part 1: Test method (ISO 6508-1) 3 Terms and definitions F
25、or the purposes of this document, the terms and definitions given in EN 12597 and the following applies. 3.1 penetration consistency, expressed as the distance in tenths of a millimetre that a standard needle will penetrate vertically into a sample of the material under specified conditions of tempe
26、rature, load and loading duration 4 Principle The penetration of a standard needle into a conditioned test sample shall be measured. For penetrations up to approximately (330 0,1) mm the operating parameters shall be a test temperature of 25 C, an applied load of 100 g, and a loading duration of 5 s
27、. For penetrations expected above approximately (330 0,1) mm, the test temperature shall be reduced to 15 C but the operating parameters of the applied load and the loading duration remain unchanged. Other conditions can be applied; also to reflect different purposes e.g. 200 g, 60 s and 5 C may be
28、used as indicative for low temperature performance. DIN EN 1426:2015-09 EN 1426:2015 (E) 5 5 Apparatus Usual laboratory apparatus and glassware, together with the following: 5.1 Penetrometer; apparatus that permits a needle holder to move vertically without measurable friction and enables the needle
29、 penetration to be determined to the nearest 0,1 mm. The needle holder shall be readily detachable from the apparatus and shall have a mass of (47,50 0,05) g. A weight of (50,00 0,05) g suitable for attachment to the needle holder shall be provided if not already fixed to the needle holder. The stan
30、d upon which the specimen container, or transfer dish rests shall be flat and horizontal. The 50 g weight shall be fixed underneath the support (see Figure 1). An example of a suitable penetrometer is shown in Figure 1. To facilitate levelling, the penetrometer should be provided with level adjustme
31、nt screws. NOTE The use of the needle-holder of (97,50 0,05) g without additional weight is also possible. Equipment that controls the penetration time automatically may also be used. Such equipment shall be checked regularly for correct penetration time (see 5.6). 5.2 Penetration needle, (see Figur
32、e 2) 5.2.1 Penetration needle specifications made from fully hardened, tempered and polished stainless steel of type X105CrMo17 (1.4125), conforming to EN 10088-3, taking into account that it is not necessary to comply with the minimum content of molybdenum specified in that standard, and of Rockwel
33、l hardness C54 to C60 determined in accordance with EN ISO 6508-1. The cylindrical body of the needle shall have a diameter of 1,00 mm to 1,02 mm and one end shall be symmetrically tapered by grinding to a cone with an angle between 840 and 940 over the entire cone length. The cone shall be co-axial
34、 with the cylindrical body of the needle; the total axial variation of the intersection between the conical and cylindrical surfaces shall not exceed 0,2 mm. Further dimensional details of the penetration needle see Figure 2. The conical tip of the needle shall be ground square to the axis of the ne
35、edle within 2 until the diameter at the tip is between 0,14 mm and 0,16 mm. For penetrations up to (330 0,1) mm the length of the needle shall be approximately 50 mm. For penetrations between (330 0,1) mm and (500 0,1) mm, use needles that shall conform to the requirements given for mass and dimensi
36、ons, but which are longer in length so that the ferrule into which the needle is fixed does not penetrate the material undergoing testing. The needle shall be rigidly mounted in a brass or stainless steel ferrule with 5 mm to 10 mm of the needle inside the ferrule. The run-out of the needle tip or a
37、ny part of the needle relative to the ferrule axis shall not exceed 1,0 mm. The ferrule shall be (3,10 0,15) mm in diameter and (38 1) mm in length. The ferrule of the penetration needle shall fit firmly into the needle holder. The mass of the ferrule and needle assembly shall be (2,50 0,05) g. NOTE
38、 1 A drill hole at the end of the ferrule or a flat on the side is possible to control the mass. Individual identification marking shall be engraved or stamped on the ferrule of each needle; the same marking shall not be repeated by the manufacturer within a 3 year period. NOTE 2 For information con
39、cerning tolerances of the needle (Figure 2), see ISO 286-1, EN 1829, EN ISO 1101 and EN ISO 1302. 5.2.2 Continuous check of penetration needle by lab It is important that initial and continued compliance with the stringent requirements for the needle is maintained. Certification of compliance shall
40、be obtained through the needle supplier or a qualified agency. DIN EN 1426:2015-09 EN 1426:2015 (E) 6 Penetration needles shall be stored adequately in a protective box. The edge of the ground tip shall be sharp and free from burrs. The needle shall be inspected visually for corrosion and shape and
41、the masses of the needle and spindle checked sufficiently regularly to assure satisfactory condition. In case of corrosion or burrs, penetration needle shall be rejected. NOTE The verification of the conical tip of the needle can be performed with binocular magnifying glasses or a microscope. A visu
42、al control of the run-out of the needle shall be performed by rolling the needle on a table. The mass of the needle plus needle holder together with the additional mass of the weight provides a moving load of (100,00 0,10) g. 5.3 Test sample container, metal or glass, cylindrical, flat-bottomed. The
43、 internal depth of the container shall be appropriate in order to contain a bituminous sample of which the depth shall be at least 10 mm greater than the expected penetration, and not less than 35 mm and shall not exceed 60 mm. The internal diameter of the container shall be at least 55 mm and shall
44、 not exceed 70 mm. NOTE 1 Recommended dimensions of the test sample container are given in Table 1. Table 1 Informative - Recommended dimensions of the test sample container (see normative details in 6.4) Penetration (0,1 mm) Internal depth (mm) Internal diameter (mm) Approx. volume of sample (mL) A
45、pprox. cooling time in air or conditioning time in water (min) penetration 180 ml - cool for 60 - 90 min for each 100 ml of test sample. Place the test sample in the constant temperature bath for a similar period to that used for cooling, and start testing. NOTE 2 To avoid uneven surfaces of samples
46、 of hard bitumen according to EN 13305 after cooling, place the sample container filled with hot bitumen into the oven at a temperature of approximate 80 C for a period of 15 to 30 min. Then cool to ambient temperature and continue as described in this standard. NOTE 3 For measurement at temperature
47、s lower than 25 C, longer cooling times can be required. 6.5 When test conditions are not specified, for penetration values below approximately (330 0,1) mm, the temperature, total applied load and loading duration shall be 25 C, 100 g and 5 s. For penetration values above approximately (330 0,1) mm
48、, the test shall be carried out at conditions of 15 C, 100 g and 5 s. When other conditions are used, the details shall be reported in full. NOTE In this case, the precision can be different from that stated in Clause 9. The temperature of the sample has a significant influence on the test result. Duration and circumstances to achieve the test temperature shall be documented accurately under Test report e). 7 Procedure 7.1 Preparation of the needle holder and needles Examine the needle h
