1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 13286-47:2012Unbound and hydraulically bound mixturesPart 47: Test method for the determination of California bearing ratio, immediate bearing index and linear swellingBS E
2、N 13286-47:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13286-47:2012.It supersedes BS EN 13286-47:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/510/4, Cementitious bound materials, unboundgranular
3、materials, waste materials and marginal materials. A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British St
4、andards Institution 2012. Published by BSI StandardsLimited 2012 ISBN 978 0 580 75765 5 ICS 93.080.20 Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 201
5、2. Amendments issued since publicationDate T e x t a f f e c t e dBS EN 13286-47:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13286-47 April 2012 ICS 93.080.20 Supersedes EN 13286-47:2004English Version Unbound and hydraulically bound mixtures - Part 47: Test method for the determination
6、 of California bearing ratio, immediate bearing index and linear swelling Mlanges traits et mlanges non traits aux liants hydrauliques - Partie 47: Mthode dessai pour la dtermination de lindice portant Californien (CBR), de lindice de portance immdiate (IPI) et du gonflement linaire Ungebundene und
7、hydraulisch gebundene Gemische - Teil 47: Prfverfahren zur Bestimmung des CBR-Wertes (California bearing ratio), des direkten Tragindex (IBI) und des linearen Schwellwertes This European Standard was approved by CEN on 9 March 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regul
8、ations 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 membe
9、r. 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. CE
10、N members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
11、Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN
12、 national Members. Ref. No. EN 13286-47:2012: EBS EN 13286-47:2012EN 13286-47:2012 (E) 2 Contents Page Foreword 31 Scope 52 Normative references 53 Terms and definitions .54 Principle 55 Apparatus .65.1 Apparatus for specimen manufacture .65.2 Additional apparatus for soaking procedure and measureme
13、nt of swelling 65.3 Additional apparatus for determination of the California bearing ratio and immediate bearing index 66 Test sample for the California bearing ratio and immediate bearing index tests .67 Specimen manufacture for the California bearing ratio and immediate bearing index tests 78 Curi
14、ng for California bearing ratio test78.1 General 78.2 Curing by prevention of evaporation .78.3 Curing that permits full soaking .88.4 Curing consisting of prevention of evaporation followed by soaking .89 Procedure for California bearing ratio and immediate bearing index determination .910 Calculat
15、ion and expression of results .910.1 Force/penetration curve 910.2 Calculation of California bearing ratio/immediate bearing index 1010.3 Reporting California bearing ratio/immediate bearing index results 1011 Test report . 11BS EN 13286-47:2012EN 13286-47:2012 (E) 3 Foreword This document (EN 13286
16、-47:2012) 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 October 2012, and conflicti
17、ng national standards shall be withdrawn at the latest by October 2012. 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
18、supersedes EN 13286-47:2004. The following changes have been made in comparison with EN 13286-47:2004: Editorial changes; Addition of the 2ndparagraph in Clause 6. This European standard is one of a series of standards as listed below: EN 13286-1, Unbound and hydraulically bound mixtures Part 1: Tes
19、t methods for laboratory reference density and water content Introduction, general requirements and sampling; EN 13286-2, Unbound and hydraulically bound mixtures Part 2: Test methods for laboratory reference density and water content Proctor compaction; EN 13286-3, Unbound and hydraulically bound m
20、ixtures Part 3: Test methods for laboratory reference density and water content Vibrocompression with controlled parameters; EN 13286-4, Unbound and hydraulically bound mixtures Part 4: Test methods for laboratory reference density and water content Vibrating hammer; EN 13286-5, Unbound and hydrauli
21、cally bound mixtures Part 5: Test methods for laboratory reference density and water content Vibrating table; EN 13286-7, Unbound and hydraulically bound mixtures Part 7: Cyclic load triaxial test for unbound mixtures; EN 13286-40, Unbound and hydraulically bound mixtures Part 40: Test method for th
22、e determination of the direct tensile strength of hydraulically bound mixtures; EN 13286-41, Unbound and hydraulically bound mixtures Part 41: Test method for the determination of the compressive strength of hydraulically bound mixtures; EN 13286-42, Unbound and hydraulically bound mixtures Part 42:
23、 Test method for the determination of the indirect tensile strength of hydraulically bound mixtures; EN 13286-43, Unbound and hydraulically bound mixtures Part 43: Test method for the determination of the modulus of elasticity of hydraulically bound mixtures; BS EN 13286-47:2012EN 13286-47:2012 (E)
24、4 EN 13286-44, Unbound and hydraulically bound mixtures Part 44: Test method for the determination of the alpha coefficient of vitrified blast furnace slag; EN 13286-45, Unbound and hydraulically bound mixtures Part 45: Test method for the determination of the workability period of hydraulically bou
25、nd mixtures; EN 13286-46, Unbound and hydraulically bound mixtures Part 46: Test method for the determination of the moisture condition value; EN 13286-47, Unbound and hydraulically bound mixtures Part 47: Test method for the determination of California bearing ratio, immediate bearing index and lin
26、ear swelling; EN 13286-48, Unbound and hydraulically bound mixtures Part 48: Test method for the determination of degree of pulverisation; EN 13286-49, Unbound and hydraulically bound mixtures Part 49: Accelerated swelling test for soil treated by lime and/or hydraulic binder; EN 13286-50, Unbound a
27、nd hydraulically bound mixtures Part 50: Method for the manufacture of test specimens of hydraulically bound mixtures using Proctor equipment or vibrating table compaction; EN 13286-51, Unbound and hydraulically bound mixtures Part 51: Method for the manufacture of test specimens of hydraulically bo
28、und mixtures using vibrating hammer compaction; EN 13286-52, Unbound and hydraulically bound mixtures Part 52: Method for the manufacture of test specimens of hydraulically bound mixtures using vibrocompression; EN 13286-53, Unbound and hydraulically bound mixtures Part 53: Methods for the manufactu
29、re of test specimens of hydraulically bound mixtures using axial compression; prEN 13286-54, Unbound and hydraulically bound mixtures Part 54: Test method for the determination of frost susceptibility Resistance to freezing and thawing of hydraulically bound mixtures. According to the CEN/CENELEC In
30、ternal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
31、embourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13286-47:2012EN 13286-47:2012 (E) 5 1 Scope This European Standard specifies the test methods for the laboratory determination of the California bearin
32、g ratio and immediate bearing index. The tests are appropriate to that part of the mixture up to a maximum particle size of 22,4 mm. When immersion in water is specified as part of the curing of the specimen, this European Standard also includes the determination of vertical swelling of the specimen
33、 before the determination of the California bearing ratio. 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 lat
34、est edition of the referenced document (including any amendments) applies. EN 1097-5:2008, Tests for mechanical and physical properties of aggregates Part 5: Determination of the water content by drying in a ventilated oven EN 13286-2, Unbound and hydraulically bound mixtures Part 2: Test methods fo
35、r laboratory reference density and water content Proctor compaction 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 California bearing ratio ratio used to characterise the bearing capacity of a mixture, determined immediately after compaction
36、, or after a period of curing 3.2 immediate bearing index immediate California bearing ratio test without surcharge 3.3 Proctor compactive effort compactive effort used in the Proctor test described in EN 13286-2 3.4 modified Proctor compactive effort compactive effort used in the modified Proctor t
37、est described in EN 13286-2 3.5 curing period of time and storage condition between manufacture and testing of the specimen for the California bearing ratio 4 Principle The relationship between force and penetration is determined when a cylindrical piston of a standard cross-sectional area is made t
38、o penetrate a specimen of a mixture, contained within a mould, at a given rate. BS EN 13286-47:2012EN 13286-47:2012 (E) 6 The California bearing ratio or immediate bearing index is calculated by expressing the force on the piston for a given penetration as a percentage of a reference force. 5 Appara
39、tus 5.1 Apparatus for specimen manufacture 5.1.1 Proctor mould B with appropriate spacer disc, if required conforming to EN 13286-2. 5.1.2 Rammer A or B, conforming to EN 13286-2. 5.1.3 Balance accurate to 0,1 % of mass weighed and capable of weighing up to 30 kg. 5.1.4 Apparatus conforming to EN 10
40、97-5:2008 for water content determination. 5.1.5 Miscellaneous apparatus including coarse filter papers, a steel straightedge, scrapers, etc. 5.2 Additional apparatus for soaking procedure and measurement of swelling 5.2.1 Base plate uniformly perforated for minimum 1 % of its surface. 5.2.2 Perfora
41、ted top plate in aluminium alloy with adjustable stem to provide the seating for the stem of a dial gauge. 5.2.3 Unperforated top plate in aluminium alloy with a thickness (10 1) mm with adjustable stem to provide the seating for the stem of a dial gauge. 5.2.4 Device for measuring the vertical expa
42、nsion of the specimen for the California bearing ratio accurate to 0,05 mm. 5.2.5 Soaking tank, large enough to allow the Proctor mould B to be submerged, preferably supported on an open mesh platform. 5.2.6 Annular surcharge rings, each having a mass known to 100 g, an internal diameter of (53 1) m
43、m and an external diameter equal to the diameter of the mould minus 5 mm. NOTE Alternatively half-annular segments may be used. 5.3 Additional apparatus for determination of the California bearing ratio and immediate bearing index 5.3.1 Cylindrical penetration piston with a diameter of (50 0,5) mm,
44、the lower end of which shall be of hardened steel. 5.3.2 Loading machine with a capacity of at least 50 kN capable of applying the test force through the piston at a penetration rate of (1,27 0,20) mm/min. The machine shall be equipped with a load-indicating device that can be read to 5 N or less. 6
45、 Test sample for the California bearing ratio and immediate bearing index tests After sieving on a 22,4 mm sieve, approximately 7,5 kg of mixture shall be used for one test and water content determination. The quantity shall be weighed accurately so that the actual quantity used for the test sample
46、can be determined after compaction by difference for checking purposes. BS EN 13286-47:2012EN 13286-47:2012 (E) 7 NOTE Preliminary trials may be necessary to ascertain the required quantity more closely. The determination of the immediate bearing index shall be carried out no later than 90 min after
47、 mixing for all hydraulically bound mixtures but no sooner than 60 min where lime is used. 7 Specimen manufacture for the California bearing ratio and immediate bearing index tests 7.1 Clamp the mould, with extension collar attached, to the base plate. Insert the spacer disc over the base plate and
48、place an anti-sticking medium such as coarse filter paper on top of the spacer disc. The California bearing ratio assembly shall be placed on a solid substrate e.g. concrete or plinth, prior to specimen manufacture. Compact the mixture into the mould using either Proctor or modified Proctor compacti
49、ve effort in accordance with EN 13286-2. NOTE It is normal but not universal practice to use a mould that requires the use of a spacer disc. 7.2 After compaction, remove the extension collar and carefully trim the mixture flush with the top of the mould with the scraper, checking with the steel straightedge. Patch with smaller size material any holes that may have deve
