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!%F0=“2351326www.din.deDDIN EN 12593Bitumen and bituminous binders Determination of the Fraass breaking point;English version EN 12593:2015,English translation of DIN EN 12593:2015-09Bitumen und bitumenhaltige Bindemittel Bestimmung des Brechpunktes nach Fraa;Englische Fassung E
3、N 12593:2015,Englische bersetzung von DIN EN 12593:2015-09Bitumes et liants bitumineux Dtermination du point de fragilit Fraass;Version anglaise EN 12593:2015,Traduction anglaise de DIN EN 12593:2015-09SupersedesDIN EN 12593:2007-06www.beuth.deIn case of doubt, the German-language original shall be
4、considered authoritative.Document comprises 19 pages 08.15 DIN EN 12593:2015-09 2 A comma is used as the decimal marker. National foreword This document (EN 12593:2015) has been prepared by Technical Committee CEN/TC 336 “Bituminous binders” (Secretariat: AFNOR, France). The responsible German bodie
5、s involved in its preparation 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 Bindemit
6、tel. Amendments This standard differs from DIN EN 12593:2007-06 as follows: a) Annex A is for information only; b) Subclause 5.3.3 “Temperature measuring device” has been revised; the calibration of thermometers using the reference mercury stem thermometer is no longer necessary; c) regarding the sa
7、mple preparation, the procedure for press-application of sample has been deleted, and the maximum sample preparation time of 10 min has been moved from an informative note to the normative text; d) the determination of the Fraass breaking point (former Subclauses 7.3 and 7.4) has been editorially re
8、vised and transferred to the present Subclause 7.3 and a flow diagram in a new Figure 7; e) the standard has been editorially revised. Previous editions DIN 1995: 1929-01, 1934-01, 1941-11, 1960x-02 DIN 52012: 1980-12, 1985-08 DIN EN 12593: 2000-04, 2007-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISC
9、HE NORM EN 12593 July 2015 ICS 75.140; 91.100.50 Supersedes EN 12593:2007English Version Bitumen and bituminous binders - Determination of the Fraass breaking point Bitumes et liants bitumineux - Dtermination du point de fragilit Fraass Bitumen und bitumenhaltige Bindemittel - Bestimmung des Brechpu
10、nktes nach Fraa This European Standard was approved by CEN on 27 May 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliog
11、raphical 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 three official versions (English, French, German). A version in any other language made by translation under the responsib
12、ility 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 bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republi
13、c of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALIS
14、ATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12593:2015 EEN 12593:2015 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normati
15、ve references 4 3 Terms and definitions .4 4 Principle 4 5 Apparatus .4 6 Sampling and sample preparation .6 6.1 General 6 6.2 Test plate preparation .6 6.3 Coating test plates .6 7 Procedure .7 7.1 Test conditions 7 7.2 Measurement 7 7.2.1 Manual or semi-automatic apparatus 7 7.2.2 Fully automatic
16、apparatus 8 7.3 Determination of the Fraass breaking point .8 8 Expression of results 8 9 Precision .8 9.1 Repeatability .8 9.2 Reproducibility .8 10 Test report 9 11 Figures 9 Annex A (informative) Characteristics of the thermometer . 15 Annex B (informative) Examples . 16 DIN EN 12593:2015-09 EN 1
17、2593:2015 (E) 3 Foreword This document (EN 12593:2015) has been prepared by Technical Committee CEN/TC 336 “Bituminous binders”, the secretariat of which is held by AFNOR. This document supersedes EN 12593:2007. This European Standard shall be given the status of a national standard, either by publi
18、cation 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 possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC
19、shall not be held responsible for identifying any or all such patent rights. There are three major changes in this revised standard compared to the former version. the standard has been revised due to a normative reference to mercury thermometers. The changes involve mainly the text in 5.3.3 and the
20、 present Annex A is now informative; regarding sample preparation the procedure for press-application of sample has been deleted, and the maximum sample preparation time of 10 min has been moved from an informative note to the normative text; the explanation for determination of Fraass breaking poin
21、t in the former 7.3 and 7.4 have been editorial changed into the present 7.3 and a flow diagram in a new Figure 7. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulga
22、ria, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tur
23、key and the United Kingdom. DIN EN 12593:2015-09 EN 12593:2015 (E) 4 1 Scope This European Standard specifies a method for determining the Fraass breaking point which measures the brittleness of bitumen and bituminous binders at low temperatures. WARNING Use of this European Standard can involve haz
24、ardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability of re
25、gulatory limitations prior to use. 2 Normative references The following documents, 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 refer
26、enced document (including any amendments) applies. EN 58, Bitumen and bituminous binders - Sampling bituminous binders EN 1425, Bitumen and bituminous binders - Characterization of perceptible properties EN 1427, Bitumen and bituminous binders - Determination of the softening point - Ring and Ball m
27、ethod EN 12594, Bitumen and bituminous binders - Preparation of test samples 3 Terms and definitions For the purposes of this document, the following term and definition applies. 3.1 Fraass breaking point temperature, expressed in degrees Celsius, at which a film of bituminous binder of a specified
28、and uniform thickness will break under defined loading conditions 4 Principle A sample of bituminous binder is applied to a metal plate at an even thickness. This plate is subjected to a constant cooling rate and flexed repeatedly until the binder layer breaks; the temperature at which the first cra
29、ck appears is reported as the Fraass breaking point. 5 Apparatus Usual laboratory apparatus and glassware, together with the following: 5.1 Plates, made of tempered spring steel with the following dimensions: (41,00 0,05) mm long, (20,0 0,2) mm wide and (0,15 0,02) mm thick. The plates shall be kept
30、 flat and protected from corrosion when not in use. Any plate that becomes visibly curved or corroded shall be discarded. 5.2 Plate preparation equipment, used for application of the melted sample, and including: 5.2.1 Magnet block with a flat and smooth surface (Figure 1) holding one to three plate
31、s with a suitable cover (Figure 2). DINEN 12593:2015-09EN 12593:2015 (E) 5 5.2.2 Metal support with two distinct zones: one temperature regulated and controlled, the other one cooled by water circulation. The support shall be horizontal and include an air bubble level and level adjustment screws. 5.
32、3 Fraass breaking apparatus, as shown in Figure 3, consisting of the parts described in 5.3.1 to 5.3.3. NOTE Manual apparatus can be replaced by semi-automatic or automatic apparatus reproducing the same conditions. 5.3.1 Bending apparatus, as shown in Figure 4. The clearance between the two tubes,
33、when assembled so that one can move longitudinally within the other, shall not exceed 1 mm. The tubes shall be made of a material that is of low thermal expansion (linear expansion coefficient: 60 Stem outside diameter mm 6,0 to 7,0 Bulb length mm 10 to 16 Bulb outside diameter mm stem diameter Scal
34、e location Distance between bottom of bulb to line at -38 C mm 271 approximately Length of scale mm 72 approximately NOTE The thermometer IP 42C has been found suitable if the use of mercury stem thermometer is allowed by national regulation. DIN EN 12593:2015-09 EN 12593:2015 (E) 16 Annex B (inform
35、ative) Examples Two examples are given to illustrate the adjustment of expected Fraass breaking point (Tj) and how reach a reported result following the conditions in 7.3 and shown in the flow diagram, Figure 7. Example 1: Fraass breaking point shall be determined for an unknown bitumen grade 70/100
36、 (from EN 12591). Expected result (educated guess 1) is -10 C (= initial Tj). First determination: Flexure is started at 0 C (e.g. 10 C above Tj). Result T0= -12 C. Tjis adjusted to -12 C. Second determination: Flexure is started at -2 C (e.g. 10 C above adjusted Tj). Result T1= -13 C. The absolute
37、difference between T0and T1is 1 C, which means that T0and T1are valid determinations. The reported result is the mean value ( -12,5 C) rounded to the nearest whole number. In this case the result is -13 C. Example 2: Fraass breaking point shall be determined for an unknown bitumen grade 500/650 (fro
38、m EN 12591). Expected result (educated guess 1) is -29 C (= initial Tj). First determination: Flexure is started at -19 C (e.g. 10 C above Tj). Result T0= -26 C. The absolute difference between Tjand T0is 3 C, which means that two new determinations T2and T3shall be performed. The first determinatio
39、n T0is only used to adjust Tjto -26 C. Second determination: Flexure is started at -16 C (e.g. 10 C above the adjusted Tj). Result T2= -30 C. It is only in determination of T0that it is a strict requirement that the absolute difference between Tjand T0is 2 C or less for T0to be a valid determination
40、. It shall be the intention in the following determinations to achieve 1If values for penetration and softening point ring and ball are available for unknown bitumen samples, initial estimation of Tjbased on Bitumen Test Data Chart (Heukeloms diagram) can be very advantageous. David Whiteoak: The Sh
41、ell Bitumen Handbook, 2003 DIN EN 12593:2015-09 EN 12593:2015 (E) 17 a maximum absolute difference between Tjand the determined Fraass breaking point of 2 C but not a strict requirement. In this case based on T2 it is decided to adjust Tjto -28 C. Third determination: Flexure is started at -18 C (e.
42、g. 10 C above the adjusted Tj). Result T3= -26 C. The absolute difference between T2and T3is above 3 C, which means that two new plates shall be prepared and tested. Tjis maintained at -28 C. Fourth determination: Flexure is started at -18 C (e.g. 10 C above Tj). Result T4= -31 C. It is decided not
43、to adjust Tjfurther which is kept at -28 C. Fifth determination: Flexure is started at -18 C (e.g. 10 C above Tj). Result T5= -26 C. The absolute difference between T4and T5is above 3 C, which means that T4and T5are not by themselves valid determinations, but further testing is stopped. The reported
44、 result (based on T2, T3, T4and T5) is the mean value ( -28,25 C) rounded to the nearest whole number. In this case the result is -28 C with determinations in the range from -26 C to -31 C. The result is valid, since the range of the four determinations is less than the reproducibility given in Table 1. DIN EN 12593:2015-09
