1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Slurry surfacing - Test methodsPart 4: Determination of cohesion of the mixBS EN 12274-4:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12274-4 March 2018 ICS 93.080.20 Supersedes EN 12274-4:2003English Versio
2、n Slurry surfacing - Test methods - Part 4: Determination of cohesion of the mix Matriaux bitumineux couls froid - Mthode dessai - Partie 4: Dtermination de la cohsion du mlange Dnne Asphaltdeckschichten in Kaltbauweise - Prfverfahren - Teil 4: Bestimmung der Kohsion von Bitumenschlmmen This Europea
3、n Standard was approved by CEN on 13 November 2017. 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 bibliographical references con
4、cerning 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 responsibility of a CEN member i
5、nto 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 Republic of Macedonia, France,
6、 Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCH
7、ES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12274-4:2018 ENational forewordThis British Standard is the UK implementation of EN 122
8、74-4:2018. It supersedes BS EN 12274-4:2003, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/510/2, Surface treatments.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport
9、 to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 93514 5ICS 93.080.20Compliance with a British Standard cannot confer immunity from legal obligations
10、. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 12274-4:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12274-4 March 2018 ICS 93.0
11、80.20 Supersedes EN 12274-4:2003English Version Slurry surfacing - Test methods - Part 4: Determination of cohesion of the mix Matriaux bitumineux couls froid - Mthode dessai - Partie 4: Dtermination de la cohsion du mlange Dnne Asphaltdeckschichten in Kaltbauweise - Prfverfahren - Teil 4: Bestimmun
12、g der Kohsion von Bitumenschlmmen This European Standard was approved by CEN on 13 November 2017. 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
13、-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 European Standard exists in three official versions (English, French, German). A version in any other language made by translat
14、ion 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 the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland,
15、Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZ
16、ATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12274-4:2018 EBS EN 12274-4:2018EN 12274-
17、4:2018 (E) 2 Contents Page European foreword . 3 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Principle . 6 5 Materials . 6 5.1 Coarse aggregates and fine aggregates . 6 5.2 Reactive filler 6 5.3 Emulsion . 6 6 Apparatus . 6 6.1 Apparatus used for preparation of samples 6 6.2 App
18、aratus used for testing. 9 6.2.1 Cohesion tester 9 6.2.2 Air supply, of 700 kPa minimum for pneumatic device only 9 7 Calibration of test apparatus (Cohesion Tester) 11 7.1 Materials 11 7.2 Procedure for calibration 11 8 Preparation of sample 12 8.1 Temperature 12 8.2 Water 12 8.3 Aggregates and fil
19、ler . 12 8.4 Water and additive 12 8.5 Preparation of the mix . 13 8.6 Sample size . 13 8.7 Curing . 13 9 Test procedure 13 10 Expression of results . 14 11 Test report 14 12 Precision 15 BS EN 12274-4:2018EN 12274-4:2018 (E) 3 European foreword This document (EN 12274-4:2018) has been prepared by T
20、echnical 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, either by publication of an identical text or by endorsement, at the latest by September 2018, and conflicting national standards shall be
21、 withdrawn at the latest by September 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12274-4:2003. Compared with E
22、N 12274-4:2003, the following changes have been made: a) The requirement for five samples for test has been removed, permitting the actual number to be determined in the producers method statement. Precision for five and three samples is being evaluated. b) The temperature to facilitate drying has b
23、een increased from 100 C to 110 C. c) The rubber foot is now specified in terms of IRHD to ISO 48. d) The possibility of usage of automatic equipment added. e) Various Notes have been changed to standard text to clarify the requirements and improve precision. f) Assessment of the samples (uneven pro
24、file, loss of aggregate, etc.) is reported as this affects the result. g) Visual assessment of the samples after test is graded according to photographs that have been added. This European Standard is one of a series of standards as listed below: EN 12274-1, Slurry surfacing Test methods Part 1: Sam
25、pling of slurry surfacing mixture EN 12274-2, Slurry surfacing Test methods Part 2: Determination of residual binder content including preparation of samples EN 12274-3, Slurry surfacing Test methods Part 3: Consistency EN 12274-4, Slurry surfacing Test methods Part 4: Determination of cohesion of t
26、he mix EN 12274-5, Slurry surfacing Test methods Part 5: Determination of the minimum binder content and wearing resistance EN 12274-6, Slurry surfacing Test methods Part 6: Rate of application EN 12274-7, Slurry surfacing Test methods Part 7: Shaking abrasion test BS EN 12274-4:2018EN 12274-4:2018
27、(E) 4 EN 12274-8, Slurry surfacing Test methods Part 8: Visual assessment of defects According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re
28、public, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kin
29、gdom. BS EN 12274-4:2018EN 12274-4:2018 (E) 5 1 Scope This European Standard specifies a test method for determining the minimum cohesion of a slurry surfacing mixture, which enables the set time and trafficability time to be determined. This European Standard applies to slurry surfacing to be used
30、in surface layers for roads, airfields and other trafficked areas. 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,
31、 the latest edition of the referenced document (including any amendments) applies. EN 12274-3, Slurry surfacing - Test methods - Part 3: Consistency ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 6344-2, Coated abrasives Grain size a
32、nalysis Part 2: Determination of grain size distribution of macrogrits P12 to P220 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 set end of the non-reversible process in a slurry surfacing when the emulsion coalescence takes place Note 1 to
33、 entry: The coalescence of an emulsion is the non-reversible phase starting from the beginning of the breaking of the emulsion to the total setting when the bitumen emulsion reverts to bitumen in presence of a mineral. Note 2 to entry: After the set of a slurry surfacing: it is not possible to stir
34、the mixture; free emulsion during washing with water cannot be observed; and an absorbent paper is not stained when pressed slightly onto the surface of the slurry surfacing. 3.2 set time time elapsed between placing a slurry surfacing and its setting 3.3 trafficability time period of time after lay
35、ing, when the slurry surfacing can accept traffic 3.4 quick setting slurry surfacing slurry surfacing with a set time less than or equal to 30 min 3.5 slow setting slurry surfacing slurry surfacing with a set time more than 30 min BS EN 12274-4:2018EN 12274-4:2018 (E) 6 4 Principle Torque measuremen
36、ts are taken on samples of the same slurry surfacing mixture at suitable intervals after casting. NOTE It has been demonstrated that in some cases 3 samples can be sufficient for a reliable test. For some slurry surfacing mixtures the precision of the test is poor due to loss of aggregates or uneven
37、 surface profile. If this is the case a comment shall be made in the report. 5 Materials 5.1 Coarse aggregates and fine aggregates A sufficient amount of the separated aggregates to be used in the slurry surfacing shall be dried in an oven at (110 5) C to reach constant mass. Wet aggregates may be u
38、sed, preferably at their own natural moisture. In case of natural moisture, water content W is determined by drying in an oven at a temperature of (110 5) C until constant mass. Constant mass shall be deemed to be achieved when the difference between successive weighings at 30 min intervals does not
39、 exceed 0,1 % of the mass. 5.2 Reactive filler Reactive filler, e.g. cement or hydrated lime, shall be dried in an oven at (110 5) C to reach a constant mass. Constant mass shall be deemed to be achieved when the difference between successive weighings at 30 min intervals does not exceed 0,1 % of th
40、e mass. 5.3 Emulsion The emulsion shall be manually homogenized using a glass rod. 6 Apparatus 6.1 Apparatus used for preparation of samples a) Oven, with a suitable capacity capable of maintaining a temperature of (110 5) C. b) Balance, with an accuracy of 0,1 g. c) Timing device, with an accuracy
41、of 1 s. d) Metal square-shaped moulds, having four circular holes (see Figure 1) of the dimensions given in Table 1. e) End-rounded spatula or metal rod. f) Ladles or beakers, of 1 L (litre) and 2 L capacity. g) Roofing felt, weight per unit area of (700 100) g/m2for sample holder of the same dimens
42、ions as the square metal with moulds. BS EN 12274-4:2018EN 12274-4:2018 (E) 7 Table 1 Dimensions of moulds Moulds Dimensions Width (W) mm Length (L) mm Height (H) mm Hole diameter mm Tolerances mm upper D lower D (W),(L) (H) (D,D) Type A 140 140 6,3 60 60,3 1 % 1 % 1 % Type B 140 140 10,0 60 60,4 Ty
43、pe C 200 200 13,0 90 90,6 Type D 250 250 19,0 115 115,8 BS EN 12274-4:2018EN 12274-4:2018 (E) 8 Dimensions in millimetres a) Upper view b) Side view Key L length W width D upper diameter H height D lower diameter Figure 1 Square-shaped metal plate with moulds, upper view and side view BS EN 12274-4:
44、2018EN 12274-4:2018 (E) 9 6.2 Apparatus used for testing 6.2.1 Cohesion tester a) Cohesion tester, as shown in Figures 2 and 3 with a tolerance of 0,1 mm on the dimensions of the influent parts of the device (rubber foot). An automatic device can be used. b) Double rod end air cylinder, 28,5 mm in d
45、iameter, with 8 mm diameter rods and 76 mm stroke. c) Rubber foot, hardness (55 5) IRHD, of dimensions (28,5 0,1) mm diameter, in accordance with ISO 48. As wearing part of the device, the rubber foot height (non influent part of the device) has a specific tolerance of 1 mm. NOTE 55 IRHD is approxim
46、ately equivalent to 60 degrees durometer. d) Air pressure regulator, with a variable downstream bleed valve so that constant pressure is maintained. e) Four-way directional control valve, with exhaust port regulating valves. f) Air pressure gauge, with a 0 kPa to 700 kPa pressure gauge. g) Torque me
47、ter, capable of measuring and recording at least 3,5 Nm torque, accuracy of 0,1 Nm. 6.2.2 Air supply, of 700 kPa minimum for pneumatic device only BS EN 12274-4:2018EN 12274-4:2018 (E) 10 Dimensions in millimetres Key 1 control valve 2 air pressure gauge 3 drive socket for straight handle of torque
48、meter 4 double acting double end rod pneumatic cylinder 5 rubber foot plug 6 rubber foot 7 sample Figure 2 Cohesion Tester BS EN 12274-4:2018EN 12274-4:2018 (E) 11 Dimensions in millimetres Figure 3 Cohesion tester, side view 7 Calibration of test apparatus (Cohesion Tester) 7.1 Materials a) Calibra
49、ted fine aggregate with a grading curve in accordance with Table 2. Table 2 Grading curve of calibrated fine aggregate Sieve mm Passing % 1 0,5 85 to 100 0 to 5 b) P220 grit silicon carbide sand paper. c) P100 grit silicon carbide sand paper. P220 and P100 shall be in accordance with ISO 6344-2. 7.2 Procedure for calibration Place the P220 grit sand paper in the cohesion tester and make 5 to 10 measurements in accordance with Clause 9 (with the exception
