1、June 2008DEUTSCHE NORM English price group 9No 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!$O+f“1440867www.
2、din.deDDIN EN 1097-7Tests for mechanical and physical properties of aggregates Part 7: Determination of the particle density of filler Pyknometer methodEnglish version of DIN EN 1097-7:2008-06Prfverfahren fr mechanische und physikalische Eigenschaften vonGesteinskrnungen Teil 7: Bestimmung der Rohdi
3、chte von Fller Pyknometer-VerfahrenEnglische Fassung DIN EN 1097-7:2008-06SupersedesDIN EN 1097-7:1999-10www.beuth.deDocument comprises 15 pagesDIN EN 1097-7:2008-06 2 National foreword This standard has been prepared by Technical Committee CEN/TC 154 “Aggregates” (Secretariat: BSI, United Kingdom).
4、 The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Technical Committee NA 062-03-13 AA Gesteinskrnungen Prfverfahren, Petrographie, Probenahme und Przision. Amendments This standard differs from DIN EN 1097-7:1999-
5、10 as follows: a) Clause 1 “Scope” has been revised to concretize the reference method used for type testing and in cases of dispute. b) The vacuum required has been changed to less than 3,0 kPa. Previous editions DIN EN 1097-7: 1999-10 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1097-7 Mar
6、ch 2008 ICS 91.100.15 Supersedes EN 1097-7:1999 English Version Tests for mechanical and physical properties of aggregates - Part 7: Determination of the particle density of filler - Pyknometer method Essais pour dterminer les caractristiques mcaniques et physiques des granulats - Partie 7: Dtermina
7、tion de la masse volumique absolue du filler - Mthode au picnomtre Prfverfahren fr mechanische und physikalische Eigenschaften von Gesteinskrnungen - Teil 7: Bestimmung der Rohdichte von Fller - Pyknometer-Verfahren This European Standard was approved by CEN on 4 February 2008. CEN members are bound
8、 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
9、 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 Management Centre has the same statu
10、s as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
11、 Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved wo
12、rldwide for CEN national Members. Ref. No. EN 1097-7:2008: EEN 1097-7:2008 (E) Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle5 5 Materials .5 6 Apparatus .5 7 Preparation of test portion6 8 Procedure .6 9 Calculation and expression of results.6 10 T
13、est report 7 Annex A (normative) Calibration of the pyknometer.8 Annex B (normative) Procedure for the determination of the density of the liquid used to determine the particle density of the filler 10 Annex C (informative) Precision 12 Bibliography 13 DIN EN 1097-7:2008-06 2 EN 1097-7:2008 (E) 3 Fo
14、reword This document (EN 1097-7:2008) has 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 Sep
15、tember 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. 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 p
16、atent rights. This document supersedes EN 1097-7:1999. This European Standard forms part of a series of standards for tests for mechanical and physical properties of aggregates. Test methods for other properties of aggregates will be covered by parts of the following European Standards: EN 932, Test
17、s for general properties of aggregates EN 933, Tests for geometrical properties 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
18、 1097 will be: Part 1: Determination of the resistance to wear (micro-Deval) 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 the water conten
19、t by drying in a ventilated oven Part 6: Determination of particle density and water absorption Part 8: Determination of the polished stone value Part 9: Determination of the resistance to wear by abrasion from studded tyres - Nordic test Part 10: Determination of water suction height According to t
20、he CEN/CENELEC Internal Regulations, the national standards 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, Lithua
21、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1097-7:2008-06 EN 1097-7:2008 (E) 4 1 Scope This standard describes the reference method used for type testing and in cases of dispute for the determi
22、nation of the particle density of filler by means of a pyknometer. 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. 2 Normative references The following referenced
23、 documents are indispensable for the application of 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 fo
24、r reducing laboratory samples EN 932-5, Tests for general properties of aggregates - Part 5: Common equipment and calibration ISO 3507, Laboratory glassware - Pyknometers 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 laboratory sample reduc
25、ed sample derived from a bulk sample for laboratory testing 3.2 test portion sample used as a whole in a single test 3.3 test specimen sample used in a single determination when a test method requires more than one determination of a property 3.4 constant mass successive weighings after drying at le
26、ast 1 h apart not differing by more than 0,1 % NOTE In many cases constant mass can be achieved after a test portion has been dried for a pre-determined period in a specified oven (see 6.6) at (110 5) C. Test laboratories can determine the time required to achieve constant mass for specific types an
27、d sizes of sample dependent upon the drying capacity of the oven used. 3.5 particle density of filler mass per volume unit of filler excluding any trapped air 3.6 filler aggregate aggregate, most of which passes a 0,063 mm sieve, which can be added to construction materials to provide certain proper
28、ties DIN EN 1097-7:2008-06 EN 1097-7:2008 (E) 5 4 Principle The pyknometer method is a well known method for determining the volume of irregularly formed samples, e.g., aggregate. When the mass of the sample is known, the density can be calculated. The principle is based on the replacement of a cert
29、ain amount of liquid of known density with the test portion. A pyknometer with known volume, containing the test portion, is topped up with the liquid. The volume of this liquid is calculated by dividing the mass of the liquid added by the liquid density. The volume of the test portion is then calcu
30、lated by subtraction of this volume from the pyknometer volume. 5 Materials 5.1 Suitable liquid, in which the filler does not dissolve and with which the filler does not react. NOTE Water, denatured ethanol, redistilled kerosene or toluene have been found to be suitable for different types of filler
31、. 5.2 Demineralized water, boiled and cooled, for calibration (see Annex A). 5.3 Acetone, for calibration (see Annex A). 6 Apparatus 6.1 All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5. 6.2 Pyknometer, of nominal capacity 50 ml, conforming to ISO 3507. T
32、he stopper shall be concave at the underside, and shall include a thick-walled capillary (riser pipe) whose top has been ground to a level surface. NOTE The pyknometer can be fitted with a thermometer. 6.3 Water bath, capable of being maintained at (25 0,1) C. 6.4 Balance, accurate to the nearest 0,
33、001 g for the determination. 6.5 Balance, accurate to the nearest 0,000 1 g for calibration (see Annex A). 6.6 Drying oven, thermostatically controlled to maintain a temperature of (110 5) C. 6.7 Desiccator, filled with an appropriate amount of desiccant. 6.8 Vacuum desiccator. 6.9 Vacuum pump, capa
34、ble of achieving a residual pressure of less than 3,0 kPa. 6.10 Spatula. 6.11 Test sieve, 0,125 mm and suitable receiver. DIN EN 1097-7:2008-06 EN 1097-7:2008 (E) 6 7 Preparation of test portion Reduce the size of the laboratory sample in accordance with EN 932-2. The test portion before drying shal
35、l have a minimum mass of 50 g. Dry the test portion at (110 5) C to constant mass and leave it to cool down in the desiccator (see 6.7) for at least 90 min. Check the test portion for the presence of lumps and, if present, pulverize them carefully with the spatula and mix the pulverized lumps. Dry s
36、ieve the filler using the 0,125 mm sieve. Retain all the particles which pass the sieve. 8 Procedure Carry out the determination of density using three separate test specimens, using a calibrated pyknometer or pyknometers (see Annex A) and a liquid of a known density (see Annex B). Carry out all wei
37、ghing with an accuracy of 0,001 g. Proceed as follows for each of the three determinations. Weigh the clean and dry pyknometer with stopper (mo). Fill the pyknometer with (10 1) g of filler taken from the test portion and weigh it again (m1). Add sufficient liquid to completely submerge the test spe
38、cimen. NOTE Add the liquid very carefully allowing it to percolate through the filler in the pyknometer. Put the stopper in the pyknometer, place the pyknometer in the vacuum desiccator and evacuate it with the vacuum pump in approximately 5 min to less than 3,0 kPa. Leave the pyknometer for at leas
39、t 30 min in the vacuum desiccator at a pressure less than 3,0 kPa. After restoring the air pressure in the desiccator, take the pyknometer out and fill it with liquid. Place the pyknometer without stopper in the water bath at (25 0,1) oC so that the top protrudes between 2 mm to 3 mm above the water
40、 level in the bath. After 60 min, put the stopper in the pyknometer causing an amount of liquid to come out of the capillary. Dry the top of the capillary and remove the pyknometer from the water bath. Quickly cool the pyknometer in cold (running) water, to prevent liquid expanding out of the capill
41、ary due to warm handling. Carefully dry the outside and weigh the pyknometer filled with test specimen and liquid (m2). 9 Calculation and expression of results Calculate the particle density of the filler, in megagrams per cubic metre, in accordance with the following equation: flmmVmm=1021(1) where
42、 m0 is the mass of the empty pyknometer with stopper, in grams; m1 is the mass of the pyknometer with the filler test portion, in grams; DIN EN 1097-7:2008-06 EN 1097-7:2008 (E) 7 m2 is the mass of the pyknometer with the filler test portion, topped up with liquid (see 5.1), in grams; V is the volum
43、e of the pyknometer, in millilitres (see Annex A); l is the density of liquid at 25 C, in megagrams per cubic metre (see Annex B); fis the particle density of the filler at 25 C, in megagrams per cubic metre. Calculate the particle density of the filler as the mean of the three determinations, and r
44、ound off to the nearest 0,01 Mg/m3. NOTE A statement on the precision of this test is given in Annex C. 10 Test report 10.1 Required data The test report shall include the following information: a) particle density fof the filler; b) reference to this European Standard (EN 1097-7:2008); c) brand nam
45、e or type/source of the filler; d) name and location of the sample source; e) liquid used for the determination and its density l(see Annex B); f) date of the determination. 10.2 Optional data The test report can include the following information: a) description of the material; b) description of th
46、e sampling procedure; c) weighing data and the densities from the three individual determinations. DIN EN 1097-7:2008-06 EN 1097-7:2008 (E) 8 Annex A (normative) Calibration of the pyknometer A.1 General The pyknometer (see 6.2) shall be calibrated by determining its volume. A.2 Procedure A.2.1 Clea
47、n the pyknometer by thoroughly rinsing it several times with acetone (see 5.3) and dry it. A.2.2 Weigh the pyknometer together with the stopper (mO). Carry out both weighings with an accuracy of 0,0001 g. A.2.3 Fill the pyknometer with demineralized water (see 5.2). A.2.4 Place the pyknometer (witho
48、ut stopper) in the water bath at (25 0,1) oC, so that the top protrudes between 2 mm and 3 mm above the water level in the bath. A.2.5 After 60 min, place the stopper on the pyknometer, causing an amount of water to come out of the capillary. A.2.6 Dry the top of the capillary and remove the pyknome
49、ter from the water bath. A.2.7 Quickly cool the pyknometer in cold (running) water, to prevent demineralized water expanding out of the capillary due to warm handling. A.2.8 Carefully dry the outside and weigh the pyknometer filled with water (m3). A.2.9 Calculate the volume of the pyknometer, in millilitres, in accordance with the following equation: wmmV03= (A.1) where V is the volume of the pyknometer, in millilitres; mois the mass of the empty pyknometer with stopper, in grams; m3is the mass of the pyknometer, filled wit
