Unknown BRITISH STANDARD BS EN 12697 9 2002 Bituminous mixtures — Test methods for hot mix asphalt — Part 9 Determination of the reference density The European Standard EN 12697 9 2002 has the status[.]
Trang 1BRITISH STANDARD BS EN
12697-9:2002
Bituminous mixtures —
Test methods for hot
mix asphalt —
Part 9: Determination of the reference
density
The European Standard EN 12697-9:2002 has the status of a
British Standard
ICS 93.080.20
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Trang 2This British Standard, having
been prepared under the
direction of the Building and
Civil Engineering Sector Policy
and Strategy Committee, was
published under the authority
of the Standards Policy and
Strategy Committee on
29 November 2002
© BSI 29 November 2002
ISBN 0 580 40871 X
National foreword
This British Standard is the official English language version of
EN 12697-9:2002
The UK participation in its preparation was entrusted by Technical Committee B/510, Road materials, to Subcommittee B/510/1, Coated macadam and hot asphalt, which has the responsibility to:
A list of organizations represented on this subcommittee can be obtained on request to its secretary
Cross-references
The British Standards which implement international or European
publications referred to in this document may be found in the BSI Catalogue
under the section entitled “International Standards Correspondence Index”, or
by using the “Search” facility of the BSI Electronic Catalogue or of British
Standards Online
This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
— aid enquirers to understand the text;
— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the
UK interests informed;
promulgate them in the UK
Summary of pages
This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover
The BSI copyright date displayed in this document indicates when the document was last issued
Amendments issued since publication
Trang 3EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
EN 12697-9
November 2002
ICS 93.080.20
English version
Bituminous mixtures - Test methods for hot mix asphalt - Part 9:
Determination of the reference density
Mélanges bitumineux - Méthodes d'essai pour mélange
hydrocarboné à chaud - Partie 9: Détermination de la
masse volumique de référence
Asphalt - Prüfverfahren für Heißasphalt - Teil 9: Bestimmung der Bezugsraumdichte, Gyrator-Verdichter
This European Standard was approved by CEN on 8 September 2002.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
C O M I T É E U R O P É E N D E N O R M A L I S A T I O N
E U R O P Ä IS C H E S K O M IT E E FÜ R N O R M U N G
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members. Ref No EN 12697-9:2002 E
Trang 4page
Foreword 3
1 Scope 6
2 Normative references 6
3 Terms and definitions 6
4 Principle 7
5 Materials and Apparatus 8
6 Procedure 8
6.1 General 8
6.2 Determination of density of specimens 8
7 Calculation and expression of results 8
8 Test report 9
9 Precision 10
9.1 Impact compaction 10
9.2 Compaction degree 10
9.3 Gyratory compaction 10
9.4 Vibratory compaction 11
Trang 5EN 12697-9:2002 (E)
3
Foreword
This document (EN 12697:2002) has been prepared by Technical 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 May 2003, and conflicting national standards shall be withdrawn at the latest by April 2005
This European Standard is one of a series of standards as follows:
EN 12697-1, Bituminous mixtures — Test methods for hot mix asphalt — Part 1: Soluble binder content
EN 12697-2, Bituminous mixtures — Test methods for hot mix asphalt — Part 2: Determination of particle size distribution
EN 12697-3, Bituminous mixtures — Test methods for hot mix asphalt — Part 3: Binder recovery: Rotary evaporator
EN 12697-4, Bituminous mixtures — Test methods for hot mix asphalt — Part 4: Binder recovery: Fractionating column
EN 12697-5, Bituminous mixtures — Test methods for hot mix asphalt — Part 5: Determination of the maximum density
prEN 12697-6, Bituminous mixtures — Test methods for hot mix asphalt — Part 6: Determination of bulk density of bituminous specimen by hydro-static method
EN 12697-7, Bituminous mixtures — Test methods for hot mix asphalt — Part 7: Determination of bulk density of bituminous specimens by gamma rays
prEN 12697-8, Bituminous mixtures — Test methods for hot mix asphalt — Part 8: Determination of void characteristics of bituminous specimens
EN 12697-9, Bituminous mixtures — Test methods for hot mix asphalt — Part 9: Determination of the reference density
EN 12697-10, Bituminous mixtures — Test methods for hot mix asphalt — Part 10: Compactibility
prEN 12697-11, Bituminous mixtures — Test methods for hot mix asphalt — Part 11: Determination of the compatibility between aggregate and bitumen
prEN 12697-12, Bituminous mixtures — Test methods for hot mix asphalt — Part 12: Determination of the water sensitivity of bituminous specimens
EN 12697-13, Bituminous mixtures — Test methods for hot mix asphalt — Part 13: Temperature measurement
EN 12697-14, Bituminous mixtures — Test methods for hot mix asphalt — Part 14: Water content
prEN 12697-15, Bituminous mixtures — Test methods for hot mix asphalt — Part 15: Determination of the segregation sensitivity
prEN 12697-16, Bituminous mixtures — Test methods for hot mix asphalt — Part 16: Abrasion by studded tyres
prEN 12697-17, Bituminous mixtures — Test methods for hot mix asphalt — Part 17: Partial loss of porous asphalt specimen
Trang 6prEN 12697-18, Bituminous mixtures — Test methods for hot mix asphalt — Part 18: Binder drainage from porous asphalt
prEN 12697-19, Bituminous mixtures — Test methods for hot mix asphalt — Part 19: Permeability of specimen
prEN 12697-20, Bituminous mixtures — Test methods for hot mix asphalt — Part 20: Indentation using cube or marshall specimen
prEN 12697-21, Bituminous mixtures — Test methods for hot mix asphalt — Part 21: Indentation using plate specimens
prEN 12697-22, Bituminous mixtures — Test methods for hot mix asphalt — Part 22: Wheel tracking
prEN 12697-23, Bituminous mixtures — Test methods for hot mix asphalt — Part 23: Determination of the indirect tensile strength of bituminous specimens
prEN 12697-24, Bituminous mixtures — Test methods for hot mix asphalt — Part 24: Resistance to fatigue
prEN 12697-25, Bituminous mixtures — Test methods for hot mix asphalt — Part 25: Cyclic compression test
prEN 12697-26, Bituminous mixtures — Test methods for hot mix asphalt — Part 26: Stiffness
EN 12697-27, Bituminous mixtures — Test methods for hot mix asphalt — Part 27: Sampling
EN 12697-28, Bituminous mixtures — Test methods for hot mix asphalt — Part 28: Preparation of samples for determining binder content, water content and grading
EN 12697-29, Bituminous mixtures — Test methods for hot mix asphalt — Part 29: Determination of the dimensions of bituminous specimen
prEN 12697-30, Bituminous mixtures — Test methods for hot mix asphalt — Part 30: Specimen preparation, impact compactor
prEN 12697-31, Bituminous mixtures — Test methods for hot mix asphalt — Part 31: Specimen preparation, gyratory compactor
prEN 12697-32, Bituminous mixtures — Test methods for hot mix asphalt — Part 32: Laboratory compaction of bituminous mixtures by a vibratory compactor
prEN 12697-33, Bituminous mixtures — Test methods for hot mix asphalt — Part 33: Specimen preparation, slab compactor
prEN 12697-34, Bituminous mixtures — Test methods for hot mix asphalt — Part 34: Marshall test
prEN 12697-35, Bituminous mixtures — Test methods for hot mix asphalt — Part 35: Laboratory mixing
prEN 12697-36, Bituminous mixtures — Test methods for hot mix asphalt — Part 36: Determination of the thickness of a bituminous pavement
prEN 12697-37, Bituminous mixtures — Test methods for hot mix asphalt — Part 37: Hot sand test for the adhesivity of binder on precoated chippings for HRA
prEN 12697-38, Bituminous mixtures — Test methods for hot mix asphalt — Part 38: Test equipment and calibration
prEN 12697-39, Bituminous mixtures − Test methods for hot mix asphalt − Part 39: Soluble binder content of mixtures by ignition method
prEN 12697-40, Bituminous mixtures − Test methods for hot mix asphalt − Part 40: Void content, compaction and hydraulic conductivity of material in the layer
Trang 7EN 12697-9:2002 (E)
5
prEN 12697-41, Bituminous mixtures − Test methods for hot mix asphalt − Part 41: Resistance to deicing fluid
prEN 12697-42, Bituminous mixtures − Test methods for hot mix asphalt − Part 42: Content of foreign matters in reclaimed asphalt
prEN 12697-43, Bituminous mixtures − Test methods for hot mix asphalt − Part 43: Resistance to fuel
prEN 12697-44, Bituminous mixtures − Test methods for hot mix asphalt − Part 44: Binder content of mixtures with modified binders
prEN 12697-45, Bituminous mixtures — Test methods for hot mix asphalt — Part 45: Binder drainage – Schellenberg method
The applicability of this European Standard is described in the product standards for bituminous mixtures
No existing European Standard is superseded
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom
Trang 81 Scope
This European Standard describes a test method for the determination of reference densities of bituminous mixtures These densities are obtained on specimens compacted by three alternative compactors at specified compaction energies in accordance with prEN 12697-30, prEN 12697-31 and prEN 12697-32 for the impact, gyratory and vibratory compactors respectively
This European Standard is applicable to bituminous mixtures made up in the laboratory and those resulting from work site operations, with D dependent upon the compaction method and not >31,5 mm
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text, and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies (including amendments)
prEN 12697-6, Bituminous mixtures — Test methods for hot mix asphalt — Part 6: Determination of bulk density of bituminous specimen by hydro-static method
prEN 12697-30, Bituminous mixtures — Test methods for hot mix asphalt — Part 30: Specimen preparation, impact compactor
prEN 12697-31, Bituminous mixtures — Test methods for hot mix asphalt — Part 31: Specimen preparation, gyratory compactor
prEN 12697-32, Bituminous mixtures — Test methods for hot mix asphalt — Part 32: Laboratory compaction of bituminous mixtures by a vibratory compactor
prEN 12697-33, Bituminous mixtures — Test methods for hot mix asphalt — Part 33: Specimen preparation, slab compactor
prEN 12697-35, Bituminous mixtures — Test methods for hot mix asphalt — Part 35: Laboratory mixing
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply
3.1
conventional reference density
value expressed as mass per unit volume that is used as a reference for the density of specimens for the determination of compaction degree, results of type testing, etc
compactor, generally varies according to the nominal thickness of the layer in which it is intended to be used
3.2
conventional refusal density
value expressed as mass per unit volume of the specimen compacted to a very high compaction energy or refusal
in accordance with prEN 12697-31 and prEN 12697-32 with the gyratory and vibratory compactor respectively and determined in accordance with prEN 12697-6
NOTE The conventional refusal density is independent of the thickness of the layer
Trang 9EN 12697-9:2002 (E)
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3.3
compaction degree
ratio of the bulk density of the specimen determined in accordance with prEN 12697-6 (dried bulk density if applicable to a core) to the conventional reference density for the corresponding thickness of layer expressed as a percentage
3.4
percentage refusal density (PRD)
ratio of the initial dried bulk density of the specimen determined in accordance with prEN 12697-6 to the conventional refusal density expressed as a percentage
4 Principle
4.1 The conventional reference density is determined in one of the following two ways:
a) by compacting by impact compactor specimens obtained from laboratory or plant mixtures with a predetermined number of hammer blows on each side of the specimens;
b) by compacting by gyratory compactor specimens obtained from laboratory or plant mixtures at a prescribed number of gyrations which varies according to the nominal thickness of the layer in which it will be used
NOTE 2 The number of gyrations is stated in the product standard
4.2 The conventional refusal density is determined in one of the following two ways:
a) by compacting by gyratory compactor specimens obtained from laboratory or plant mixtures for 200 gyrations; b) by compacting by vibratory compactor a heated core sample to refusal
NOTE 3 Until such time as relevant data is obtained from the use of the procedure with a vibrating hammer for other product types, this European Standard only applies to asphalt concrete base and binder course mixtures
The initial dried bulk density of a core specimen of a dense bituminous mixture is measured
The compaction degree is calculated as the ratio between that density and the conventional reference density or the percentage refusal density is calculated as the ratio between that density and the conventional refusal density
density
The uses of compaction methods are summarized in Table 1
Table 1
Compaction Method Parameter Impact compactor Gyratory
compactor compactorVibratory Conventional reference density Yes Yes Not normally
Conventional refusal density No Yes
(at 200 gyrations) Yes Compaction degree Yes Yes Not normally
Percentage refusal density
(PRD) No (at 200 gyrations)Yes Yes
Trang 105 Materials and Apparatus
The materials and apparatus for determining the reference density shall conform to prEN 12697-30, prEN 12697-31, and prEN 12697-32 for impact, gyratory and vibratory compaction respectively
6 Procedure
6.1 General
If required for calculation of the compaction degree or the percentage refusal density, the initial dried bulk density of core samples shall be measured in accordance with prEN 12697-6
6.1.1 Impact compaction
The apparatus and procedure for the preparation of the specimens shall be in accordance with prEN 12697-30
6.1.2 Gyratory compaction
The asphalt mixture shall be prepared and introduced into the mould The gyratory compactor shall be adjusted and operated, and the curve of density versus number of gyrations shall be established in accordance with prEN 12697-31 The reference density shall be the average of the results for three specimens
If the sample of bituminous mixture is cut or cored in a compacted layer, it shall be reheated in a preheated oven at the temperature specified in prEN 12697-35 and retained in the oven until the centre of the core has attained the specified temperature, broken down, and the mass (M) specified in prEN 12697-32 is introduced into the mould, which is brought to the test temperature specified in prEN 12697-35 The conventional reference density or refusal density of a core shall be the result obtained on one core only
6.1.3 Vibratory compaction
For the determination of refusal density, the specimens for test shall be prepared in accordance with prEN 12697-33
6.2 Determination of density of specimens
The initial dried bulk density of core samples shall be determined in accordance with prEN 12697-6
The bulk density of reference specimens shall be determined in accordance with prEN 12697-6
7 Calculation and expression of results
The initial dried bulk density and reference densities shall be calculated in accordance with prEN 12697-6
The compaction degree (Crg or Cri) shall be calculated from the following equations:
100
rg
bc
rg= ⋅
ρ
ρ
where
Crg is the compaction degree (gyrator compactor), in percent (%);
ρbc is the initial dried bulk density, in kilograms per cubic metre (kg/m3);
ρrg is the conventional reference density (gyrator compactor), in kilograms per cubic metre (kg/m3)