EN 12697-11:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Asphalt - Prüfverfahren für Heißasphalt - Teil 11: Bestimmung der Affinität von Gesteinskörnungen und BitumenMélanges bitumineux - Méthodes d'essai pour mélange hydrocarboné à chaud - Partie 11: Détermination de l'affinité granulat-bitumeBituminous mixtures - Test methods for hot mix asphalt - Part 11: Determination of the affinity between aggregate and bitumen93.080.20Materiali za gradnjo cestRoad construction materialsICS:Ta slovenski standard je istoveten z:EN 12697-11:2012SIST EN 12697-11:2012en,fr,de01-september-2012SIST EN 12697-11:2012SLOVENSKI
STANDARDSIST EN 12697-11:2006/AC:2007SIST EN 12697-11:20061DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12697-11
April 2012 ICS 93.080.20 Supersedes EN 12697-11:2005English Version
Bituminous mixtures - Test methods for hot mix asphalt - Part 11: Determination of the affinity between aggregate and bitumen
Mélanges bitumineux - Méthodes d'essai pour mélange hydrocarboné à chaud - Partie 11: Détermination de l'affinité granulat-bitume
Asphalt - Prüfverfahren für Heißasphalt - Teil 11: Bestimmung der Affinität von Gesteinskörnungen und Bitumen This European Standard was approved by CEN on 9 March 2012.
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 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 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.
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Page Foreword .31 Scope .72 Normative references .73 Terms and definitions .74 Principle .85 Rolling bottle method .85.1 Equipment .85.2 Preparation of test specimens . 115.2.1 Aggregate . 115.2.2 Bitumen . 125.2.3 Mixing aggregate and bitumen . 125.3 Conditioning . 135.4 Procedure . 135.5 Calculation and expression of results . 155.6 Report . 155.7 Precision . 166 Static method . 166.1 Equipment . 166.2 Solvent and other materials . 176.3 Preparation of test specimens . 176.3.1 Aggregate . 176.3.2 Bitumen . 176.4 Procedure . 176.5 Calculation and expression of results . 186.6 Report . 186.7 Precision . 187 Boiling water stripping method . 187.1 General . 187.2 Equipment and materials . 197.3 Sample preparation . 207.3.1 Aggregate . 207.3.2 Bitumen . 217.3.3 Mixing aggregate and bitumen . 217.4 Conditioning . 217.5 Test procedure . 217.5.1 Establishing the acid/base equivalence factor . 217.5.2 Establishing the calibration curve . 227.5.3 Stripping test . 237.6 Calculation and expression of results . 247.6.1 Determination of the calibration curve . 247.6.2 Calculation of the degree of bitumen coverage . 257.7 Test report . 267.8 Precision . 26Annex A (informative)
Guidance for estimation of the degree of bitumen coverage . 27Bibliography . 28 SIST EN 12697-11:2012

The volume capacity shall be approximately 500 ml. The bottles shall have a diameter of (80 ± 10) mm and a height of (175 ± 10) mm. The bottle shall have a shoulder height of (110 ± 10) mm (see Figures 1 and 2). The bottle neck shall have an opening diameter of (30 ± 5) mm, equipped with a water-tight fitting screw cap. 5.1.11 Glass-rods, diameter of (6 ± 1) mm, equipped with (30 ± 10) mm long, fitting rubber tubes.
The rubber tube shall be positioned on one end of the glass-rod so that the length of the rod is extended by approximately half of the tube length. The length of the glass-rod shall be proportioned, so that the rod with rubber tube can be firmly fixed inside the test bottle between the bottom and the screw cap (see Figure 3). NOTE The glass rod ensures mechanical stirring and reduces risk of coated aggregate forming lumps. SIST EN 12697-11:2012

The rotation speed shall be adjustable, so that both a speed of 40 min-1 and 60 min-1 can be obtained with an accuracy of ± 10 %. The machine shall be positioned such that the bottles rotate horizontally with a tolerance of ± 5°.
Figure 1 — Test bottle
Figure 2 — Bottle rolling machine 5.1.13 Glass beakers. Volume not less than 200 ml. 5.1.14 Test bowls, suitable for visual determination of degree of binder coating on the aggregate.
The bowls shall be flat-bottomed and of sufficient diameter to allow for placing of a test portion of (150 ± 2) g aggregate in a single layer, and of sufficient height to allow the test portion of aggregate to be completely submerged in water. NOTE Flat-bottomed 'Petri-dishes' made of glass with approximate diameter 120 mm and height 15 mm may be considered suitable. 5.1.15 Lamp to provide a suitable light source to facilitate visual determination of binder coating on aggregate. 5.1.16 Magnifying glass with low magnification, to facilitate determination of degree of binder coating on aggregate (optional). SIST EN 12697-11:2012

Key 1 screw cap, bottle opening diameter (30 ± 5) mm 2 rubber tube 3 glass rod, diameter (6 ± 1) mm 4 glass test bottle 5 level A (shoulder) Figure 3 — Test bottle with appropriate dimensions 5.2 Preparation of test specimens 5.2.1 Aggregate 5.2.1.1 Using test sieves from basic set plus set 1: Separate at least 600 g of aggregate passing the 11,2 mm test sieve and retained on the 8 mm sieve in accordance with EN 12697-2 to form a 8/11 mm fraction of the aggregate to be tested. Wash the fraction on the 8 mm sieve. Using test sieves from basic set plus set 2: Separate at least 600 g of aggregate passing the 10 mm test sieve and retained on the 6,3 mm sieve in accordance with EN 12697-2 to form a 6/10 mm fraction of the aggregate to be tested. Wash the fraction on the 6,3 mm sieve. NOTE Alternatively, a smaller 5/8 mm fraction (passing the 8 mm sieve and retained on the 5,6 mm sieve, basic set + set 1) may be used. However, bitumen coated particles of the smaller 5/8 mm aggregate fraction have an increased risk of forming clusters during the rolling procedure, which may invalidate the test result. Also, use of the smaller 5/8 mm fraction may complicate the visual determination of the degree of bitumen coverage on the aggregate surfaces. Fractions smaller than 5/8 mm are not acceptable for the rolling bottle method. Therefore, 8/11 mm or 6/10 mm aggregates are preferred. SIST EN 12697-11:2012

EN 12697-35. 5.2.3.2 Heat the aggregate in the mixing bowl to the mixing temperature by placing it in the ventilated oven set at the mixing temperature ± 5 °C. Maintain the temperature for a duration of not less than 3 h. 5.2.3.3 Heat the binder to the mixing temperature by placing a container with the binder in the ventilated oven set at a temperature corresponding to the mixing temperature ± 5 °C when measured in the vicinity of the binder for a duration of (3 ± 1) h. Before mixing, remove the coverage of the container, check the binder temperature and stir the binder. 5.2.3.4 If a liquid adhesion agent is to be added to the bitumen, the adhesion agent shall be added to a bitumen sample of not less than 100 g heated to the mixing temperature. Mix the binder and adhesion agent carefully with a spatula and proceed immediately with the aggregate/binder mixing process in accordance with 5.2.3.6. If the heat stability of the adhesion agent is to be evaluated, the mixing with aggregate should not be performed immediately after mixing binder and adhesion agent. 5.2.3.5 If an adhesion improving filler is to be added to the mixture, the filler shall be added to the aggregate test portion and carefully mixed with a spatula before addition of bitumen. As the affinity is determined according to a procedure involving mechanical action, the test result may be influenced by mechanical wear, which may be different if the aggregate coating does not consist of pure binder. If the effect of an adhesion improving filler (e.g. cement or hydrated lime) is to be evaluated, the reference sample should also contain a filler, as binder coating on aggregate without filler is faster worn than binder coatings on aggregates mixed with filler (i.e. the coating is a stiffer bit
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