1、October 2009DEUTSCHE NORM English price group 14No part of this standard 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).ICS 91.100.15!$Y$“1549901w
2、ww.din.deDDIN EN 1097-8Tests for mechanical and physical properties of aggregates Part 8: Determination of the polished stone valueEnglish version of DIN EN 1097-8:2009-10Prfverfahren fr mechanische und physikalische Eigenschaften vonGesteinskrnungen Teil 8: Bestimmung des PolierwertesEnglische Fass
3、ung DIN EN 1097-8:2009-10SupersedesDIN EN 1097-8:2000-01www.beuth.deDocument comprises pages33DIN EN 1097-8:2009-10 National foreword This standard has been prepared by Technical Committee CEN/TC 154 “Aggregates” (Secretariat: BSI, United Kingdom). The responsible German body involved in its prepara
4、tion was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Joint Committee NA 062-03-13 GA Gesteinskrnungen; Prfverfahren, Petrographie, Probenahme und Przision. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 48
5、DIN ISO 48 Amendments This standard differs from DIN EN 1097-8:2000-01 as follows: a) The scope of the standard has been modified to include the information that the method is to be used as reference method for type testing and in cases of dispute. b) The standard has been editorially revised. Previ
6、ous editions DIN EN 1097-8: 2000-01 National Annex NA (informative) Bibliography DIN ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1097-8 July 2009 ICS 91.100.15 Supersedes EN 1097-
7、8:1999 English Version Tests for mechanical and physical properties of aggregates Part 8: Determination of the polished stone value Essais pour dterminer les caractristiques mcaniques et physiques des granulats Partie 8: Dtermination du coefficient de polissage acclrPrfverfahren fr mechanische und p
8、hysikalische Eigenschaften von Gesteinskrnungen Teil 8: Bestimmung des Polierwertes This European Standard was approved by CEN on 12 June 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a na
9、tional standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version i
10、n any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark,
11、Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EU
12、ROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1097-8:2009: EEN 1097-8:2009 (E) 2 Contents Page Foreword . 4 1 Scope 5 2 Normative references .
13、 5 3 Definitions 5 4 Principle . 6 5 Sampling 6 6 Materials . 6 7 Apparatus 7 7.1 General . 7 7.2 Accelerated polishing machine . 8 7.3 Friction tester 10 7.4 Test sieves . 13 7.5 Grid sieve . 13 7.6 Length gauge or callipers 13 7.7 Equipment for preparing test specimens . 13 8 Preparation of test s
14、pecimens . 14 9 Conditioning of the rubber-tyred wheel 15 10 Accelerated polishing of specimens . 15 11 Friction test procedure . 16 12 Calculation and expression of results 18 13 Test report . 18 Annex A (normative) Determination of aggregate abrasion value (AAV) . 19 A.1 General . 19 A.2 Principle
15、 . 19 A.3 Sampling 19 A.4 Materials . 19 A.5 Apparatus 20 A.6 Preparation of test specimens . 21 A.7 Procedure 21 A.8 Calculation and expression of results 22 A.9 Test report . 22 Annex B (normative) Control of materials . 24 Annex C (normative) Calibration of the accelerated polishing machine 25 C.
16、1 Control of rubber-tyred wheels . 25 C.2 Accelerated polishing machine . 25 C.3 Rate of flow of corn emery and emery flour . 25 Annex D (normative) Calibration of the friction tester and sliders . 27 D.1 Friction tester 27 D.2 Control of sliders and slider rubber 28 Annex E (informative) Precision
17、. 29 E.1 General . 29 E.2 PSV value - National Standard . 29 E.3 PSV value - European cross-border testing . 29 DIN EN 1097-8:2009-10 EN 1097-8:2009 (E) 3 E.4 Aggregate abrasion value (AAV) . 30 Bibliography . 31 DIN EN 1097-8:2009-10 EN 1097-8:2009 (E) 4 Foreword This document (EN 1097-8:2009) has
18、been prepared by Technical Committee CEN/TC 154 “Aggregates”, the secretariat of which is held by BSI. 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 2010, and conflicting national standa
19、rds shall be withdrawn at the latest by January 2010. 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 shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1097
20、-8:1999. This standard forms part of a series of tests for mechanical and physical properties of aggregates. Test methods for other properties of aggregates are covered by Parts of the following European Standards: EN 932, Tests for general properties of aggregates EN 933, Tests for geometrical prop
21、erties of aggregates EN 1367, Tests for thermal and weathering properties of aggregates EN 1744, Tests for chemical properties of aggregates EN 13179, Tests for filler aggregate used in bituminous mixtures The other parts of EN 1097 are: Part 1: Determination of the resistance to wear (micro-Deval)
22、Part 2: Methods for the determination of resistance to fragmentation Part 3: Determination of loose bulk density and voids Part 4: Determination of the voids of dry compacted filler Part 5: Determination of water content by drying in a ventilated oven Part 6: Determination of particle density and wa
23、ter absorption Part 7: Determination of the particle density of filler Pyknometer method Part 9: Determination of the resistance to wear by abrasion from studded tyres: Nordic test Part 10: Determination of water suction height According to the CEN/CENELEC Internal Regulations, the national standard
24、s organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu
25、gal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1097-8:2009-10 EN 1097-8:2009 (E) 5 1 Scope This Standard describes the reference method used for type testing and in cases of dispute for determining the polished stone value (PSV) of a coarse aggregate used
26、 in road surfacings. For other purposes, in particular factory production control, other methods may be used provided that an appropriate working relationship with the reference method has been established. Annex A describes an optional method for the determination of the aggregate abrasion value (A
27、AV). NOTE The AAV method should be used when particular types of skid resistant aggregates (typically those with a PSV of 60 or greater) which can be susceptible to abrasion under traffic, are required. 2 Normative references The following referenced documents are indispensable for the application o
28、f this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 932-2, Tests for general properties of aggregates Part 2: Methods for reducing laboratory samples EN 932-5, Tests for ge
29、neral properties of aggregates Part 5: Common equipment and calibration EN 932-6, Tests for general properties of aggregates Part 6: Definitions of repeatability and reproducibility EN 933-3, Tests for geometrical properties of aggregates Part 3: Determination of particle shape Flakiness index EN 10
30、97-6, Tests for mechanical and physical properties of aggregates Part 6: Determination of particle density and water absorption ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 4662, Rubber Determination of rebound resilience of vulcan
31、izates ISO 7619 (all parts), Rubber, vulcanized thermoplastic Determination of indentation hardness 3 Definitions For the purposes of this document the following definitions apply. 3.1 test specimen sample used in a single determination when a test method requires more than one determination of a pr
32、operty 3.2 batch production quantity, a delivery quantity, a partial delivery quantity (railway wagon-load, lorry-load, ships cargo) or a stockpile produced at one time under conditions that are presumed uniform NOTE With a continuous process the quantity produced during an agreed period is treated
33、as a batch. DIN EN 1097-8:2009-10 EN 1097-8:2009 (E) 6 3.3 laboratory sample reduced sample derived from a bulk sample for laboratory testing 3.4 subsample sample obtained by means of a sample reduction procedure 3.5 test portion sample used as a whole in a single test 4 Principle PSV is a measure o
34、f the resistance of coarse aggregate to the polishing action of vehicle tyres under conditions similar to those occurring on the surface of a road. The test is carried out on aggregate passing a 10 mm sieve and retained on a 7,2 mm grid sieve, and is in two parts: a) test specimens are subjected to
35、a polishing action in an accelerated polishing machine; b) the state of polish reached by each specimen is measured by means of a friction test. The PSV is then calculated from the friction determinations. 5 Sampling The sample submitted to the laboratory for the test shall be obtained from a batch
36、of normal production from the source. Aggregate that has been freshly produced in the laboratory or has been recovered from bituminous mixtures can give misleading results and shall not be used for conformity testing. 6 Materials 6.1 General, Detailed requirements for the control of materials are sp
37、ecified in Annex B. 6.2 Natural corn emery, complying with the grading specified in Table 1. This shall be used only once. Table 1 Grading requirements for corn emery Nominal width of sieve aperture Total passing mm %0,600 98 to 100 0,500 70 to 100 0,425 30 to 90 0,355 0 to 300,300 to 5 DIN EN 1097-
38、8:2009-10 EN 1097-8:2009 (E) 7 6.3 Air-floated or water-washed natural emery flour, all of which passes a 0,050 mm test sieve. This shall be used only once. NOTE Corundum emery flour with the following characteristics has been found to be suitable: a) at least 50 % Al2O3content; b) particle density
39、of at least 3,5 Mg/m3; c) particle size distribution (by air jet sieving) as given in Table 2. Table 2 Particle size distribution (by air jet sieving) Sieve size Passing mm %0,050 99 to 100 0,032 75 to 98 0,020 60 to 80 6.4 PSV control stone, from a recognized source, with a mean PSV value in the ra
40、nge 50 to 60. NOTE 1 At present the only recognized source of PSV control stone is a stock of quartz dolerite aggregate controlled by Transport Research Laboratory (TRL), Old Wokingham Road, Crowthorne, Berkshire RG11 6AU, United Kingdom. NOTE 2 An alternative source of PSV control stone with a mean
41、 PSV value in the range 50 to 60 can be used provided the PSV value has been established in a controlled experiment carried out in at least 10 laboratories, by cross testing against the TRL type control stone. In case of dispute, the TRL type control stone should be used. 6.5 Friction tester referen
42、ce stone, from a recognized source, for conditioning new sliders and checking the friction tester (11.3), with a mean PSV value in the range 60 to 65. NOTE 1 At present the only recognized source of friction tester reference stone is a stock of olivine basalt aggregate controlled by the Transport Re
43、search Laboratory (TRL), Old Wokingham Road, Crowthorne, Berkshire RG11 6AU, United Kingdom. NOTE 2 An alternative source of friction tester reference stone with a mean PSV value in the range 60 to 65 can be used provided the PSV value has been established in a controlled experiment carried out in a
44、t least 10 laboratories, by cross testing against the TRL type friction tester reference stone. In case of dispute, the TRL type friction tester reference stone should be used. 7 Apparatus 7.1 General All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5. Addi
45、tional requirements for calibration and control of the accelerated polishing machine and the rubber-tyred wheels are given in Annex C. DIN EN 1097-8:2009-10 EN 1097-8:2009 (E) 8 7.2 Accelerated polishing machine The polishing machine, (see Figure 1), shall be mounted on four adjustable levelling fee
46、t, placed at the corners and secured on a firm, level base of stone or concrete. It shall include the following: 7.2.1 A wheel, referred to as the “road wheel“, having a flat periphery and clamping arrangements to hold the aggregate specimens shown in Figure 2. It shall be of such a size and shape a
47、s to permit 14 of the specimens described in Clause 8 to be clamped onto the periphery so as to form a surface of aggregate particles (406 3) mm in diameter and bounded by clamping rings (44,5 0,5) mm apart. 7.2.2 A means of rotating the road wheel about its own axis at a speed of (320 5) min-1under
48、 test conditions. 7.2.3 Two solid rubber-tyred wheels of (200 3) mm diameter and with a width of (38 2) mm. These rubber-tyred wheels shall be of two different colours. A dark coloured (coarse) wheel shall be used with the corn emery and a light coloured (fine) wheel shall be used with the emery flo
49、ur. The rubber tyres shall initially have a hardness of (69 3) IRHD as specified in ISO 7619. NOTE Both rubber-tyred wheels can be of the same colour provided each is clearly marked as being “coarse“ or “fine“ as appropriate. 7.2.4 A lever arm and weight to bring the surface of the appropriate solid rubber-tyred wheel to bear on the road wheel with a total free force of (725 10) N. The solid rubber-tyred wheel shall be free to rotate about its own axis, which shall be parallel with the a
