1、BSI Standards PublicationBS EN 1367-8:2014Tests for thermal andweathering properties ofaggregatesPart 8: Determination of resistance todisintegration of Lightweight AggregatesBS EN 1367-8:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1367-8:2014.The UK pa
2、rticipation in its preparation was entrusted to TechnicalCommittee B/502/6, Test methods.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
3、its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 80004 7ICS 91.100.15Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and
4、Strategy Committee on 30 April 2014.Amendments issued since publicationDate Text affectedBS EN 1367-8:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1367-8 April 2014 ICS 91.100.15 English Version Tests for thermal and weathering properties of aggregates - Part 8: Determination of resistan
5、ce to disintegration of Lightweight Aggregates Essais pour dterminer les proprits thermiques et laltrabilit des granulats - Partie 8: Dtermination de la rsistance la dsintgration des granulats lgers Prfverfahren fr thermische Eigenschaften und Verwitterungsbestndigkeit von Gesteinskrnungen - Teil 8:
6、 Bestimmung des Widerstandes von leichten Gesteinskrnungen gegen Zerfall This European Standard was approved by CEN on 16 February 2014. 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
7、 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
8、 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, Czec
9、h 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. EU
10、ROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1367-8:2014 EB
11、S EN 1367-8:2014EN 1367-8:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 4 5 Apparatus and materials .5 6 Sampling .5 7 Test specimens 5 7.1 General 5 7.2 Size of test specimens 5 7.3 Preparation of test specimens .6 8 Procedure .6 8.1 S
12、oaking .6 8.2 Exposure to high pressure and temperature 6 9 Calculation and expression of results .6 10 Test report 7 10.1 Mandatory data 7 10.2 Optional data 7 Bibliography 8 BS EN 1367-8:2014EN 1367-8:2014 (E) 3 Foreword This document (EN 1367-8:2014) has been prepared by Technical Committee CEN/T
13、C 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 October 2014, and conflicting national standards shall be withdrawn at the latest by Oc
14、tober 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. EN 1367 “Tests for thermal and weathering properties of aggregates“ consis
15、ts of the following parts: Part 1: Determination of resistance to freezing and thawing Part 2: Magnesium sulfate test Part 3: Boiling test for “Sonnenbrand Basalt” Part 4: Determination of drying shrinkage Part 5: Determination of resistance to thermal shock Part 6: Determination of resistance to fr
16、eezing and thawing in the presence of salt (NaCl) Part 7: Determination of resistance to freezing and thawing of Lightweight Aggregates Part 8: Determination of resistance to disintegration of Lightweight Aggregates (the present document) Test methods for other properties of aggregates are covered b
17、y parts of the following European Standards: EN 932, Tests for general properties of aggregates EN 933, Tests for geometrical properties of aggregates EN 1097, Tests for mechanical and physical properties of aggregates EN 1744, Tests for chemical properties of aggregates EN 13179, Tests for filler a
18、ggregate used in bituminous mixtures NOTE This document supersedes the test method described in EN 130551:2002, Annex B. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium,
19、 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, Switzerlan
20、d, Turkey and the United Kingdom. BS EN 1367-8:2014EN 1367-8:2014 (E) 4 1 Scope This European Standard specifies the reference test method used for type testing, and in case of dispute, for determining the resistance to disintegration of lightweight aggregates (LWA) in accordance with EN 13055. For
21、other purposes, in particular for factory production control, other methods may be used provided that an appropriate working relationship with the reference method has been established The test is applicable to LWA with particle size no lower than 4 mm and up to a maximum size of 32 mm. 2 Normative
22、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) appli
23、es. 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, Tes
24、ts for geometrical properties of aggregates - Part 2: Determination of particle size distribution - Test sieves, nominal size of apertures EN 13055-1, Lightweight aggregates - Part 1: Lightweight aggregates for concrete, mortar and grout EN 13055-2, Lightweight aggregates - Part 2: Lightweight aggre
25、gates for bituminous mixtures and surface treatments and for unbound and bound applications 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13055-1, EN 13055-2 and the following apply. 3.1 test specimen sample used in single determination when a test
26、method requires more than one determination of a property 3.2 constant mass mass determined by successive weighings performed 1 h apart and 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
27、 a specified oven at (110 5) C. Test laboratories can determine the time required to achieve constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used. 4 Principle Lightweight aggregates soaked in water are exposed to high pressure and temperature to me
28、asure the resistance to disintegration. BS EN 1367-8:2014EN 1367-8:2014 (E) 5 5 Apparatus and materials 5.1 All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5. 5.2 Thermostatically controlled saturated steam autoclave, of suitable capacity and capable of ra
29、ising the test specimens from ambient temperature to (215 5) C in (60 5) min and maintaining this temperature for (180 10) min, at a pressure of (2 0,2) MPa. In addition, the autoclave shall be capable of allowing the test specimens to cool to (30 10) C in (90 10) min. 5.3 Test sieves, in accordance
30、 with EN 933-2. 5.4 Balance, capable of weighing test specimens up to 400 g with an accuracy of 0,04 g and test specimens above 400 g with an accuracy of 0,1 g. 5.5 Thermostatically controlled ventilated drying oven, capable of maintaining a temperature of (110 5) C. 5.6 Two metal containers, suitab
31、le for holding the lightweight aggregate in the autoclave. 5.7 Water, distilled or deionised. 5.8 Grid, of a suitable size and aperture to prevent the lightweight aggregates floating out of the container and to prevent any loss of whole aggregates. 6 Sampling Sampling and sample reduction shall be c
32、arried out in accordance with EN 932-1 and EN 932-2. 7 Test specimens 7.1 General Two individual test specimens shall be used. The test specimens shall be obtained in accordance with EN 932-2 by sample reduction. Particles of oversize (D) and undersize (d) shall be removed. 7.2 Size of test specimen
33、s The quantities for each of the two individual test specimens shall be chosen according to the upper size of the aggregates as shown in Table 1. Deviations of 5 % in the volume of the test specimens are permissible. Table 1 Test specimen volumes required Maximum aggregate size (mm) Approximate volu
34、me of the test specimen (l) 8 16 32 0,5 1,0 1,5 BS EN 1367-8:2014EN 1367-8:2014 (E) 6 7.3 Preparation of test specimens Wash the test specimens on the lower (d) test sieve. Dry the test specimens to constant mass. Allow to cool to ambient temperature and weigh immediately (M1,see Clause 9). Weighing
35、 shall be carried out to the following accuracies: Test specimens up to 400 g: to 0,04 g. Test specimens above 400 g: to 0,1 g. 8 Procedure 8.1 Soaking Soak the two test specimens in distilled or deionised water at ambient temperature for (72 1) h, ensuring that the water covers the test specimens b
36、y at least 10 mm. In order to prevent the test specimens floating, the specimens are kept submerged by a grid as specified in 5.8. Remove the lightweight aggregate from the distilled or deionised water and allow the specimens to drain on a sieve with a maximum size of 2 mm for about 15 min. 8.2 Expo
37、sure to high pressure and temperature Place each drained test specimen in the metal container specified in 5.6 and place in the autoclave. Raise the autoclave to a pressure of (2 0,2) MPa and a temperature of (215 5) C in (90 5) min, and maintain this pressure and temperature for (180 5) min. Allow
38、to cool to (30 10) C in (90 5) min. Transfer the containers and contents to the oven and dry at (110 5) C to constant mass and allow to cool. Weigh each test specimen (M1). Carefully screen each of the test specimens on a sieve having an aperture size that is half the lower size sieve used to prepar
39、e the test specimen (e.g. in case of the 8 mm to 16 mm fraction, use a test sieve of 4 mm aperture size). Weigh the material passing through this sieve for each test specimen (M2,see Clause 9). 9 Calculation and expression of results Calculate the loss in mass (Zi) of each test specimen in accordanc
40、e with the following formula: Zi= M2/M1 x 100 where Ziis the percentage loss in mass of the test specimen; M1is the dry mass of the test specimen after autoclave testing and before sieving, in grams; M2is the dry mass of the test specimen after autoclave testing, that is passing the specified sieve,
41、 in grams. Express Zito the nearest 0,01 %. Calculate Z as the mean of the two individual test results to the nearest 0,1 %. BS EN 1367-8:2014EN 1367-8:2014 (E) 7 10 Test report 10.1 Mandatory data The test report shall include the following information: reference to this European Standard; identifi
42、cation of the test sample, including identification of the source, aggregate size and date of sampling; sample reception date if different from sampling date; identification of the laboratory; percentage of mass loss after autoclave testing Z, expressed to the nearest 0,1 %; deviations from the refe
43、rence method, if any. 10.2 Optional data The test report can include the following information: date of test; reference to the chosen sampling procedure; reference to the chosen sample reduction procedure; percentage of the mass loss after autoclave testing of the individual test specimens Zi, expre
44、ssed to the nearest 0,01 %. BS EN 1367-8:2014EN 1367-8:2014 (E) 8 Bibliography 1 EN 1097-5, Tests for mechanical and physical properties of aggregates - Part 5: Determination of the water content by drying in a ventilated oven This page deliberately left blankBSI is the national body responsible for
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