Tests for mechanical and physical properties of aggregates - Part 6: Determination of particle density and water absorption

This European Standard specifies the reference methods used for type testing and in case of dispute, for the determination of the particle density and water absorption of normal weight and lightweight aggregates. Other methods may be used for other purposes, such as factory production control, provided that an appropriate working relationship with the reference method has been established. For convenience, some of these other methods are also described in this standard. The reference methods for normal weight aggregates specified are: - a wire basket method for aggregate particles retained on the 31,5 mm sieve (Clause 7, except for railway ballast which uses Annex B); - a pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve (Clause 8); - a pyknometer method for aggregate particles passing the 4 mm test sieve and retained on the 0,063 mm test sieve (Clause 9). In Clauses 7, 8 and 9, three different particle density parameters (oven-dried particle density, saturated and surface dried particle density and apparent particle density) and water absorption are determined after a soaking period of 24 h. In Annex B, the oven-dried particle density parameter is determined after soaking in water to constant mass. The wire basket method may be used as an alternative to the pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve. In case of dispute, the pyknometer method described in Clause 8 should be used as the reference method. The reference method for lightweight aggregates (Annex C) is a pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve. Three different particle density parameters and water absorption are determined after pre-drying and a soaking period of 24 h. Three other methods for normal weight aggregates can be used to determine the pre-dried particle density: - a wire basket method for aggregate particles passing the 63 mm test sieve and retained on the 31,5 mm test sieve (A.3); - a pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 0,063 mm test sieve (A.4); - a pyknometer method for aggregate particles passing the 31,5 mm test sieve, including the 0/0,063 mm size fraction (Annex G). The quick method in Annex E can be used in factory production control to determine the apparent particle density of lightweight aggregates. Guidance on the significance and use of the various density and water absorption parameters is given in Annex H.

Prüfverfahren für mechanische und physikalische Eigenschaften von Gesteinskörnungen - Teil 6: Bestimmung der Rohdichte und der Wasseraufnahme

Diese Europäische Norm legt das für die Erstprüfung und in Streitfällen anzuwendende Referenzverfahren für die Bestimmung der Rohdichte und der Wasseraufnahme von normalschweren und leichten Gesteins-körnungen fest. Für andere Zwecke, z. B. die werkseigene Produktionskontrolle, dürfen andere Verfahren angewendet werden, sofern ein ausreichender Zusammenhang zum Referenzverfahren nachgewiesen wurde. Zur Einfachheit sind einige dieser anderen Verfahren ebenfalls in dieser Norm beschrieben.
Die festgelegten Referenzverfahren für normalschwere Gesteinskörnungen sind:
a)   ein Drahtkorbverfahren für Gesteinskörnungen, die vom 31,5 mm Sieb zurückgehalten werden (Abschnitt 7 oder Anhang B);
b)   ein Pyknometer-Verfahren für Gesteinskörnungen, die durch das 31,5 mm Analysensieb hindurchgehen und vom 4 mm Analysensieb zurückgehalten werden (Abschnitt 8);
c)   ein Pyknometer-Verfahren für Gesteinskörnungen, die durch das 4 mm Analysensieb hindurchgehen und vom 0,063 mm Analysensieb zurückgehalten werden (Abschnitt 9).
In den Abschnitten 7, 8 und 9 werden drei verschiedene Parameter der Rohdichte (Rohdichte auf ofen-trockener Basis, Rohdichte auf wassergesättigter und oberflächentrockener Basis und scheinbare Rohdichte) und die Wasseraufnahme nach einer Eintauchzeit von 24 h bestimmt. In Anhang B wird der Parameter der Rohdichte auf ofentrockener Basis nach dem Eintauchen in Wasser bis zur Massenkonstanz bestimmt.
ANMERKUNG 1   Das Drahtkorbverfahren kann als Alternative zum Pyknometer-Verfahren für Gesteinskörnungen angewendet werden, die durch das 31,5 mm Analysensieb hindurchgehen und vom 4 mm Analysensieb zurückgehalten werden. Im Streitfall sollte das in Abschnitt 8 festgelegte Pyknometer-Verfahren als Referenzverfahren angewendet werden.
ANMERKUNG 2   Das Drahtkorbverfahren kann auch für einzelne Gesteinskörner angewendet werden, die von einem 63 mm Sieb zurückgehalten werden.
(...)

Essais pour déterminer les caractéristiques mécaniques et physiques des granulats - Partie 6 : Détermination de la masse volumique réelle et du coefficient d'absorption d'eau

La présente Norme européenne spécifie les méthodes de référence utilisées pour les essais de type initiaux et en cas de contestation pour la détermination de la masse volumique et du coefficient d'absorption d'eau de granulats courants et légers. D'autres méthodes peuvent être utilisées à d'autres fins, telles que la maîtrise de la production des granulats, dans la mesure où les résultats qu’elles délivrent peuvent être reliés à ceux obtenus avec la méthode de référence. Certaines de ces autres méthodes sont également décrites dans la présente Norme à des fins pratiques.
Les méthodes de référence pour des granulats courants spécifiées sont :
a)   la méthode du panier en treillis pour les granulats refusés au tamis de 31,5 mm (article 7 ou Annexe B) ;
b)   la méthode au pycnomètre pour les granulats passant au tamis de 31,5 mm et refusés au tamis de 4 mm (Article 8) ;
c)   la méthode au pycnomètre pour les granulats passant au tamis de 4 mm et refusés au tamis de 0,063 mm (Article 9).
Dans les Articles 7, 8 et 9, trois paramètres de masse volumique différents (masse volumique après séchage à l’étuve, saturée surface sèche et absolue) et le coefficient d’absorption d’eau sont déterminés après immersion pendant 24 heures. Dans l’Annexe B, le paramètre de masse volumique après séchage à l’étuve est déterminé après immersion dans l’eau jusqu’à masse constante.
NOTE 1   La méthode du panier en treillis peut remplacer la méthode au pycnomètre pour les granulats passant au tamis de 31,5 mm et refusés au tamis de 4 mm. En cas de contestation, il convient d’utiliser la méthode au pycnomètre décrite dans l’article 8 en tant que méthode de référence.
NOTE 2   La méthode du panier en treillis peut également être utilisée pour les grains isolés refusés au tamis de 63 mm.
NOTE 3   La méthode au pycnomètre décrite à l’article 8 peut également être utilisée pour les granulats passant au tamis de 4 mm, mais refusés au tamis de 2 mm.
(...)

Preskusi mehanskih in fizikalnih lastnosti agregatov - 6. del: Določevanje prostorninske mase zrn in vpijanja vode

Ta evropski standard določa referenčne metode, ki se uporabljajo za tipsko preskušanje in v primeru spora za določevanje prostorninske mase zrn in vpijanja vode agregatov z običajno težo in lahkih agregatov. Za druge namene, na primer za kontrolo proizvodnje v obratu, se lahko uporabijo druge metode, če obstaja primerna delovna povezava z referenčno metodo. Za lažjo uporabo so v tem standardu opisane tudi nekatere druge metode. Referenčne metode, določene za agregate z običajno težo, so: – metoda z žično košaro za zrna agregatov, ki ostanejo na situ 31,5 mm (točka 7, razen za grede železniških prog, ki uporabljajo dodatek B); – metoda s piknometrom za zrna agregatov, ki gredo skozi preskusno sito 31,5 mm in ostanejo na preskusnem situ 4 mm (točka 8); – metoda s piknometrom za zrna agregatov, ki gredo skozi preskusno sito 4 mm in ostanejo na preskusnem situ 0,063 mm (točka 9). V točkah 7, 8 in 9 so določeni trije različni parametri prostorninske mase zrn (prostorninska masa sušenih zrn, prostorninska masa zrn z nasičeno suho površino in dejanska prostorninska masa zrn) in vpijanje vode po 24-urnem namakanju. V dodatku B je določen parameter prostorninske mase sušenih zrn po namakanju v vodi do stalne mase. Metoda z žično košaro se lahko uporablja namesto metode s piknometrom za zrna agregatov, ki gredo skozi preskusno sito 31,5 mm in ostanejo na preskusnem situ 4 mm. V primeru spora se kot referenčna metoda uporabi metoda s piknometrom, opisana v točki 8. Referenčna metoda za lahke agregate (dodatek C) je metoda s piknometrom za zrna agregatov, ki gredo skozi preskusno sito 31,5 mm in ostanejo na preskusnem situ 4 mm. Trije različni parametri prostorninske mase zrn in vpijanje vode so določeni po predhodnem sušenju in 24-urnem namakanju. Za določevanje prostorninske mase predhodno sušenih zrn agregatov z običajno težo se lahko uporabijo tri druge metode: – metoda z žično košaro za zrna agregatov, ki gredo skozi preskusno sito 63 mm in ostanejo na preskusnem situ 31,5 mm (A.3); – metoda s piknometrom za zrna agregatov, ki gredo skozi preskusno sito 31,5 mm in ostanejo na preskusnem situ 0,063 mm (A.4); – metoda s piknometrom za zrna agregatov, ki gredo skozi preskusno sito 31,5 mm, vključno z deležem velikosti 0/0,063 mm (dodatek G). Hitra metoda v dodatku E se lahko uporabi pri kontroli proizvodnje v obratu za določevanje dejanske prostorninske mase zrn lahkih agregatov. Napotki o pomembnosti in uporabi različnih parametrov prostorninske mase in vpijanja vode so podani v dodatku H.

General Information

Status
Withdrawn
Public Enquiry End Date
14-Oct-2010
Publication Date
15-Sep-2013
Withdrawal Date
08-Jun-2022
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
19-May-2022
Due Date
11-Jun-2022
Completion Date
09-Jun-2022

RELATIONS

Buy Standard

Standard
SIST EN 1097-6:2013
English language
49 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ORþHYDQMHPrüfverfahren für mechanische und physikalische Eigenschaften von Gesteinskörnungen - Teil 6: Bestimmung der Rohdichte und der WasseraufnahmeEssais pour déterminer les caractéristiques mécaniques et physiques des granulats - Partie 6 : Détermination de la masse volumique réelle et du coefficient d'absorption d'eauTests for mechanical and physical properties of aggregates - Part 6: Determination of particle density and water absorption91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:Ta slovenski standard je istoveten z:EN 1097-6:2013SIST EN 1097-6:2013en,fr,de01-oktober-2013SIST EN 1097-6:2013SLOVENSKI

STANDARDSIST EN 1097-6:2002/AC:2004SIST EN 1097-6:2002/A1:2005SIST EN 1097-6:20021DGRPHãþD

SIST EN 1097-6:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1097-6
July 2013 ICS 91.100.15 Supersedes EN 1097-6:2000English Version

Tests for mechanical and physical properties of aggregates - Part 6: Determination of particle density and water absorption

Essais pour déterminer les caractéristiques mécaniques et physiques des granulats - Partie 6 : Détermination de la masse volumique réelle et du coefficient d'absorption d'eau Prüfverfahren für mechanische und physikalische Eigenschaften von Gesteinskörnungen - Teil 6: Bestimmung der Rohdichte und der Wasseraufnahme This European Standard was approved by CEN on 8 May 2013.

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.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1097-6:2013: ESIST EN 1097-6:2013

EN 1097-6:2013 (E) 2 Contents Page Foreword ..............................................................................................................................................................4 1 Scope ......................................................................................................................................................6 2 Normative references ............................................................................................................................7 3 Terms and definitions ...........................................................................................................................7 4 Principle ..................................................................................................................................................8 5 Materials .................................................................................................................................................8 6 Apparatus ...............................................................................................................................................8 7 Wire basket method for aggregate particles passing the 63 mm test sieve and retained on the 31,5 mm test sieve ........................................................................................................................ 12 7.1 General ................................................................................................................................................. 12 7.2 Preparation of test portion ................................................................................................................. 12 7.3 Test procedure .................................................................................................................................... 12 7.4 Calculation and expression of results .............................................................................................. 13 8 Pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve ....................................................................................................................... 13 8.1 General ................................................................................................................................................. 13 8.2 Preparation of test portion ................................................................................................................. 14 8.3 Test procedure .................................................................................................................................... 14 8.4 Calculation and expression of results .............................................................................................. 15 9 Pyknometer method for aggregate particles passing the 4 mm test sieve and retained on the 0,063 mm test sieve ...................................................................................................................... 15 9.1 General ................................................................................................................................................. 15 9.2 Preparation of test portion ................................................................................................................. 15 9.3 Test procedure .................................................................................................................................... 16 9.4 Calculation and expression of results .............................................................................................. 16 10 Test report ........................................................................................................................................... 17 10.1 Required data ...................................................................................................................................... 17 10.2 Optional data ....................................................................................................................................... 18 Annex A (normative)

Determination of pre-dried particle density of aggregates ..................................... 19 A.1 General ................................................................................................................................................. 19 A.2 Principle ............................................................................................................................................... 19 A.3 Wire basket method for aggregate particles passing the 63 mm test sieve and retained on the 31,5 mm test sieve ........................................................................................................................ 19 A.4 Pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 0,063 mm test sieve ................................................................................................................ 20 A.5 Test report ........................................................................................................................................... 22 Annex B (normative)

Determination of particle density and water absorption of coarse aggregates saturated to constant mass ............................................................................................................... 23 B.1 General ................................................................................................................................................. 23 B.2 Preparation of test portion ................................................................................................................. 23 B.3 Test procedure .................................................................................................................................... 23 B.4 Calculation and expression of results .............................................................................................. 24 B.5 Test report ........................................................................................................................................... 24 Annex C (normative)

Determination of particle density and water absorption of lightweight aggregates ........................................................................................................................................... 26 SIST EN 1097-6:2013

EN 1097-6:2013 (E) 3 C.1 General ................................................................................................................................................. 26 C.2 Preparation of test specimen ............................................................................................................. 26 C.3 Calibration of the pyknometer ........................................................................................................... 26 C.4 Test procedure ..................................................................................................................................... 27 C.5 Calculation and expression of results .............................................................................................. 27 C.6 Test report ............................................................................................................................................ 28 Annex D (normative)

Density of water ............................................................................................................ 30 Annex E (normative)

Quick method for the determination of the apparent particle density of lightweight aggregates using a graduated measuring cylinder and short soaking times .......... 31 E.1 General ................................................................................................................................................. 31 E.2 Preparation of test specimen ............................................................................................................. 31 E.3 Procedure ............................................................................................................................................. 31 E.4 Calculation and expression of results .............................................................................................. 31 E.5 Test report ............................................................................................................................................ 32 Annex F (informative)

Guidance on the saturated and surface-dried condition of fine aggregates ........ 33 Annex G (normative)

Determination of the pre-dried particle density of aggregates passing the 31,5 mm test sieve

(including the 0/0,063 mm size fraction) ......................................................... 35 G.1 General ................................................................................................................................................. 35 G.2 Principle ............................................................................................................................................... 35 G.3 Preparation of the test portion ........................................................................................................... 35 G.4 Test procedure ..................................................................................................................................... 35 G.5 Calculation and expression of results .............................................................................................. 36 G.6 Test report ............................................................................................................................................ 37 Annex H (informative)

Guidance on the significance and use of various particle density parameters and water absorption ...................................................................................................... 38 H.1 General ................................................................................................................................................. 38 H.2 Characteristics of the reference methods for normal weight aggregates according to Clauses 7, 8 and 9 and Annex B ........................................................................................................ 39 H.3 Characteristics of the reference method for lightweight aggregates, specified in Annex C ...... 40 H.4 Characteristics of the methods for determination of the pre-dried particle density of normal weight aggregates, specified in Annex A and Annex G .................................................................... 41 H.5 Selection of the appropriate particle density parameter ................................................................. 41 H.6 Applicability of and test conditions for the various test methods in EN 1097-6 .......................... 42 H.7 Relationships between different particle density parameters (notations according to the main methods, specified in Clauses 7, 8 and 9) ............................................................................... 43 Annex I (informative)

Precision ....................................................................................................................... 44 I.1 Data from National Standards ............................................................................................................ 44 I.2 Data from cross testing experiments ................................................................................................ 45 Annex J (informative)

List of main changes from the previous edition (EN 1097-6:2000) ........................ 47 Bibliography ...................................................................................................................................................... 49

SIST EN 1097-6:2013

EN 1097-6:2013 (E) 4 Foreword This document (EN 1097-6:2013) 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 January 2014, and conflicting national standards shall be withdrawn at the latest by January 2014. 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 1097-6:2000. Annex J provides details of significant changes between this European Standard and the previous edition. This standard forms a part of a series of tests for mechanical and physical properties of aggregates. Test methods for other properties of aggregates are covered by the following European Standards:  EN 932 (all parts), Tests for general properties of aggregates  EN 933 (all parts), Tests for geometrical properties of aggregates  EN 1367 (all parts), Tests for thermal and weathering properties of aggregates  EN 1744 (all parts), Tests for chemical properties of aggregates  EN 13179 (all parts), Tests for filler aggregate used in bituminous mixtures The other parts of EN 1097 include:  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 content by drying in a ventilated oven  Part 7: Determination of the particle density of filler — Pyknometer method  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 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 Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, SIST EN 1097-6:2013

EN 1097-6:2013 (E) 5 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1097-6:2013

EN 1097-6:2013 (E) 6 1 Scope This European Standard specifies the reference methods used for type testing and in case of dispute, for the determination of particle density and water absorption of normal weight and lightweight aggregates. Other methods may be used for other purposes, such as factory production control, provided that an appropriate working relationship with the reference method has been established. For convenience, some of these other methods are also described in this standard. The reference methods for normal weight aggregates specified are:  a wire basket method for aggregate particles retained on the 31,5 mm sieve (Clause 7, except for railway ballast which uses Annex B);  a pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve (Clause 8);  a pyknometer method for aggregate particles passing the 4 mm test sieve and retained on the 0,063 mm test sieve (Clause 9). In Clauses 7, 8 and 9, three different particle density parameters (oven-dried particle density, saturated and surface dried particle density and apparent particle density) and water absorption are determined after a soaking period of 24 h. In Annex B, the oven-dried particle density parameter is determined after soaking in water to constant mass. The wire basket method may be used as an alternative to the pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve. In case of dispute, the pyknometer method described in Clause 8 should be used as the reference method. NOTE 1 The wire basket method can also be used for single aggregate particles retained on the 63 mm sieve. NOTE 2 The pyknometer method described in Clause 8 can be used as an alternative for aggregates passing the 4 mm sieve but retained on the 2 mm sieve. The reference method for lightweight aggregates (Annex C) is a pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve. Three different particle density parameters and water absorption are determined after pre-drying and a soaking period of 24 h. Three other methods for normal weight aggregates can be used to determine the pre-dried particle density:  a wire basket method for aggregate particles passing the 63 mm test sieve and retained on the 31,5 mm test sieve (A.3);  a pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 0,063 mm test sieve (A.4);  a pyknometer method for aggregate particles passing the 31,5 mm test sieve, including the 0/0,063 mm size fraction (Annex G). NOTE 3 If water absorption is less than about 1,5 %, the apparent particle density can be assessed using the pre-dried particle density method as defined in Annex A.

The quick method in Annex E can be used in factory production control to determine the apparent particle density of lightweight aggregates. Guidance on the significance and use of the various density and water absorption parameters is given in Annex H. SIST EN 1097-6:2013

EN 1097-6:2013 (E) 7 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 referenced document (including any amendments) applies. EN 932-1, Tests for general properties of aggregates — Part 1: Methods for sampling

EN 932-2, Tests for general properties of aggregates — Part 2: Methods for reducing laboratory samples

EN 932-5, Tests for general properties of aggregates — Part 5: Common equipment and calibration EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures

3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 apparent particle density ρa ratio obtained by dividing the oven-dried mass of an aggregate sample by the volume it occupies in water including the volume of any internal sealed voids but excluding the volume of water in any water accessible voids Note 1 to entry: For lightweight aggregates the symbol ρLa is used. 3.2 constant mass mass determined after successive weighings at least 1 h apart not differing by more than 0,1 % Note 1 to entry: In many cases constant mass can be achieved after a test portion has been dried for a pre-determined period in a specified oven at (110 ± 5) °C. Test laboratories can determine the time necessary to achieve constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used. 3.3 oven-dried particle density ρrd ratio obtained by dividing the oven-dried mass of an aggregate sample by the volume it occupies in water including the volume of any internal sealed voids and the volume of any water accessible voids Note 1 to entry: For lightweight aggregates the symbol ρLrd is used. 3.4 pre-dried particle density ρp ratio obtained by dividing the pre-dried mass of an aggregate sample by the volume it occupies in water including the volume of any internal sealed voids but excluding the volume of water in any water accessible voids Note 1 to entry: Test conditions in terms of pre-drying of the test sample and the shorter immersion period differ from the ones for apparent particle density. Note 2 to entry: Pre-dried particle density is a rapid test. SIST EN 1097-6:2013

EN 1097-6:2013 (E) 8 3.5 saturated and surface-dried particle density ρssd ratio obtained by dividing the sum of the oven-dried mass of an aggregate sample and the mass of water in any water accessible voids by the volume it occupies in water including the volume of any internal sealed voids and the volume of any water accessible voids Note 1 to entry: For lightweight aggregates the symbol ρLssd is used. 3.6 test portion sample used as a whole in a single test 3.7 test specimen sample used in a single determination when a test method requires more than one determination of a property 3.8 water absorption mass of absorbed water expressed as a percentage of the oven-dried mass of the aggregate sample 4 Principle Particle density is calculated from the ratio of mass to volume. The mass is determined by weighing the test portion in the saturated and surface-dried condition and again in the oven-dried condition. Volume is determined from the mass of the water displaced, either by mass reduction in the wire basket method or by weighings in the pyknometer method. Due to the influence on the absorption, no artificial heating of the test portion should be applied before testing. However, if such material is used, this fact should be stated in the test report. For porous aggregates, the values of absorption and density depend on the size fractions which are tested. For this reason, the size fractions tested should be stated in the test report. If the aggregate consists of a number of different size fractions, it may be necessary to separate the various fractions before preparing the test portion. The percentage of each size fraction shall be stated in the test report. 5 Materials Water, boiled and cooled before use. Fresh tap water and demineralised water are both suitable. The water should be free from any impurity (e.g. dissolved air) that could significantly affect its density. Dissolved air can also be removed by applying a vacuum. 6 Apparatus All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5. 6.1 Apparatus for general purposes. 6.1.1 Ventilated oven, thermostatically controlled to maintain a temperature of (110 ± 5) °C. 6.1.2 Balance, accurate to 0,1 % of the mass of the test portion and of sufficient capacity to enable the wire basket containing the sample to be suspended and weighed in water. SIST EN 1097-6:2013

EN 1097-6:2013 (E) 9 6.1.3 Water bath, thermostatically controlled, capable of being maintained at (22 ± 3) °C. 6.1.4 Thermometer, accurate to 0,1 °C. 6.1.5 Test sieves, 0,063 mm, 4 mm, 31,5 mm and 63 mm, with apertures as specified in EN 933-2. 6.1.6 Trays, which can be heated in a ventilated oven without change in mass. 6.1.7 Dry soft absorbent cloths. 6.1.8 Washing equipment. 6.1.9 Timer. 6.2 Special apparatus for the wire basket method (Clause 7, A.3 and Annex B). 6.2.1 Wire basket, or perforated container of suitable size to enable suspension from the balance. The basket or container shall be resistant to corrosion. 6.2.2 Watertight tank, containing water at (22 ± 3) °C in which the basket may be freely suspended with a minimum clearance of 50 mm between the basket and the sides of the tank. NOTE A watertight tank can be used instead of a water bath specified in 6.1.3. 6.3 Special apparatus for pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 4 mm test sieve (Clause 8). 6.3.1 Pyknometer, consisting of a glass flask or other suitable vessel with volume between 1 000 ml and 5 000 ml, constant to 0,5 ml for the duration of the test. The volume of the pyknometer should be chosen to suit the size of the test portion. It is recommended that the test portion occupies about half of the pyknometer volume. Two smaller pyknometers can be used instead of one large one, by summing the weighings before calculating the density of the aggregate. 6.4 Special apparatus for pyknometer method for aggregate particles passing the 4 mm test sieve and retained on the 0,063 mm test sieve (Clause 9). 6.4.1 Pyknometer, consisting of a glass flask or other suitable vessel with volume between 500 ml and 2 000 ml, constant to 0,5 ml for the duration of the test. The volume of the pyknometer should be chosen to suit the size of the test portion. It is recommended that the test portion occupies about half of the pyknometer volume. Two smaller pyknometers can be used instead of one large one, by summing the weighings before calculating the density of the aggregate. 6.4.2 Metal mould, in the form of a frustum of a cone (40 ± 3) mm at the top, (90 ± 3) mm at the bottom and (75 ± 3) mm high. The metal shall have a minimum thickness of 0,8 mm. 6.4.3 Metal tamper, of mass (340 ± 15) g and having a flat circular tamping face of diameter (25 ± 3) mm, for use with the metal mould. 6.4.4 Funnel, plain glass (alternative to use of the metal mould and tamper). 6.4.5 Shallow tray, of non-water absorbing material having a plane bottom of area not less than 0,1 m² and an edge of not less than 50 mm in height. 6.4.6 Warm air supply, such as a hair dryer. 6.5 Special apparatus for the pyknometer method for aggregate particles passing the 31,5 mm test sieve and retained on the 0,063 mm test sieve (A.4). SIST EN 1097-6:2013

EN 1097-6:2013 (E) 10 6.5.1 Pyknometer, consisting of a glass flask with a volume between 250 ml and 5000 ml, constant to 0,5 ml for the duration of the test, and a corresponding glass funnel.

Choose the pyknometer to suit the size of the test specimen. It is recommended that the test specimen occupies about half of the pyknometer volume. NOTE An example of a suitable pyknometer is shown in Figure 1.

Key 1 glass funnel 2 mark 3 ground section to fit the wide-neck flat bottom flask 4 wide-neck flat bottom flask Figure 1 — Example of pyknometer 6.6 Special apparatus for the determination of particle density and water absorption of coarse aggregates saturated to constant mass (Annex B). 6.6.1 Container, of similar capacity to the wire basket specified in 6.2.1 for storage of the sample in water. SIST EN 1097-6:2013

EN 1097-6:2013 (E) 11 6.7 Special apparatus for the determination of particle density and water absorption of lightweight aggregates (C.1). 6.7.1 Pyknometer, consisting of a glass flask with a volume between 1 000 ml and 2 000 ml and a corresponding funnel (Figure 1). If appropriate, the pyknometer shall contain a flexible grid to prevent aggregates from floating. The size of the funnel should enable the release of any air bubbles. The volume of the pyknometer should be chosen to suit the size of the test portion. It is recommended that the test portion occupies about half of the pyknometer volume. 6.8 Special apparatus for the determination of particle density of lightweight aggregates with cylinder method (Annex E). 6.8.1 Glass graduated measuring cylinders, with a measuring volume of 1 000 ml. 6.8.2 Steel plunger (Figure 2), with a perforated base and vertical rod, to prevent aggregate particles from floating to the surface of the water. The difference between the internal diameter of the measuring cylinder and the diameter of the base shall be less than th

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.