1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1744-8:2012Tests for chemical properties ofaggregatesPart 8: Sorting test to determine metalcontent of Municipal Incinerator BottomAsh (MIBA) AggregatesBS EN 1744-8:2012 BR
2、ITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1744-8:2012. The UK participation in its preparation was entrusted to TechnicalCommittee B/502/6, Test methods.A list of organizations represented on this committee can be obtained on request to its secretary.This pu
3、blication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012ISBN 978 0 580 72233 2 ICS 13.030.50 Compliance with a British Standard cannot confer im
4、munity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 1744-8:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1744-8 August 2
5、012 ICS 13.030.50 English Version Tests for chemical properties of aggregates - Part 8: Sorting test to determine metal content of Municipal Incinerator Bottom Ash (MIBA) Aggregates Tests sur les proprits chimiques des granulats - Partie 8: Essai de comptage des particules mtalliques contenues dans
6、les granulats provenant de mchefers issus dincinrateurs municipaux Prfverfahren fr chemische Eigenschaften von Gesteinskrnungen - Teil 8: Sortierverfahren zur Bestimmung des Metallgehalts in Hausmllverbrennungsasche (HMV-Asche) This European Standard was approved by CEN on 13 July 2012. CEN members
7、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 t
8、o 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
9、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, Lith
10、uania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, 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 Brusse
11、ls 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1744-8:2012: E2 Contents Page Foreword . . 31 Scope. 42 Normative references . . 43 Definitions . 44 Principle . . 55 Apparatus . 56 Preparation of subsample . 67 Procedure .
12、67.1 Further reduction of the subsample . . 67.2 Separating into size fractions . 77.3 Separating metallic particles . . 77.4 Weight of metallic particles . . 78 Calculation and expression of results . 79 Test report . . 89.1 Required data . 89.2 Optional data . . 8Annex A (informative) Supplementar
13、y method for preparing the particle size fractions using crushing and sieving . . 9A.1 General . . 9A.2 Procedure . 9A.2.1 32/63 mm size fraction . 9A.2.2 16/32 mm size fraction . 9A.2.3 4/16 mm size fraction . 9A.3 Weight of metallic particles . . 10A.4 Calculations and test report . 10Bibliography
14、 . . 11BS EN 1744-8:2012 EN 1744-8:2012 (E) 3 Foreword This document (EN 1744-8:2012) 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 identi
15、cal text or by endorsement, at the latest by February 2013, and conflicting national standards shall be withdrawn at the latest by February 2013. 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
16、 responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document forms part of a series of tests for chemical properties of aggregates. Test methods for other pro
17、perties of aggregates will be covered by 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 1367, Tests for thermal and weathering propertie
18、s of aggregates The other parts of EN 1744, Tests for chemical properties of aggregates, are: Part 1: Chemical analysis Part 3: Preparation of eluates by leaching of aggregates Part 4: Determination of water susceptibility of fillers for bituminous mixtures Part 5: Determination of acid soluble chlo
19、ride salts Part 6: Determination of the influence of recycled aggregate extract on the initial setting time of cement Part 7: Determination of loss of ignition of Municipal Incinerator Bottom Ash Aggregate (MIBA Aggregate) According to the CEN/CENELEC Internal Regulations, the national standards org
20、anisations 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg
21、, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1744-8:2012 EN 1744-8:2012 (E) 4 1 Scope This European Standard specifies a simple method for the examination of Municipal Incinerator Bottom Ash (MIBA) Aggre
22、gates for the purpose of estimating the relative proportions of metallic constituents. This European Standard describes the reference methods used for type testing and, in case of dispute, for estimating the relative proportions of aluminium or other metallic constituents of MIBA Aggregates. For oth
23、er purposes, in particular factory production control, other methods may be used provided that an appropriate working relationship with the reference method has been established. NOTE MIBA Aggregates can also contain agglomerates which only contain a portion of metal. A supplementary method for prep
24、aration of a test portion containing agglomerated particles, using crushing and sieving, is given in Annex A (normative). 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,
25、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 932-1, Test for general properties of aggregates Part 1: Methods for sampling EN 932-2, Test for general properties of aggregates Part 2: Methods for reducing
26、laboratory samples EN 932-5, Test for general properties of aggregates Part 5: Common equipment and calibration EN 933-1, Test for geometrical properties of aggregates Part 1: Determination of particle size distribution Sieving method EN 933-2, Test for geometrical properties of aggregates Part 2: D
27、etermination of particle size distribution Test sieves, nominal size of apertures 3 Terms and definitions For the purpose of this standard, the following definitions apply: 3.1 laboratory sample sample intended for laboratory testing 3.2 subsample sample obtained by means of a sample reduction proce
28、dure 3.3 constant mass mass determined by successive weighings performed at least 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 a specified oven at (110 5) C. Test labora
29、tories can determine the time required to BS EN 1744-8:2012 EN 1744-8:2012 (E) 5 achieve constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used. 3.4 MIBA Aggregate aggregate produced by processing Municipal Incinerator Bottom Ash 3.5 particle size fr
30、action (di/Di) fraction of an aggregate passing the larger (Di) of two sieves and retained on the smaller sieve (di) 4 Principle The test consists of sorting particles from a subsample of the coarse part of MIBA Aggregates by hand to separate out metallic particles. The metallic particles are then s
31、eparated into ferrous (magnetic) and non-ferrous (non-magnetic) particles using a magnet. The proportion by mass of each of these constituents is determined and expressed as a percentage of the mass of the subsample. NOTE 1 For the purpose of this standard, ferrous particles are to be understood as
32、particles attracted by the hand held magnet and non-ferrous particles are metallic non-ferrous particles. NOTE 2 Aluminium/alloy particles in coarse aggregates mixtures might react and cause change in volume. When it is not possible to separate the metallic fraction from the agglomerate particles, t
33、hose agglomerates should be handled as metallic particles. 5 Apparatus Unless otherwise stated, all apparatus shall conform to the general requirements of EN 932-5. 5.1 Test sieves, 63 mm, 31,5 mm, 16 mm and 4 mm size conforming to EN 933-2. An 8 mm size test sieve is also required if the supplement
34、ary test portion preparation method in Annex A (normative) is used. 5.2 Tightly fitting pan and lid, for the sieves. 5.3 Ventilated oven, thermostatically controlled to maintain a temperature of (110 5) C. 5.4 Balance, accurate to 0,1 % of the mass of the test portion. 5.5 Trays, or other suitable c
35、ontainers. 5.6 Hand held magnet, with a mass in the range of 300 g to 600 g and with a pull strength of at least 60 kg. 5.7 Brushes, for cleaning the sieves and the sieved particles. 5.8 Sieving machine, (optional). 5.9 Laboratory crusher, if the supplementary test portion preparation method in Anne
36、x A (normative) is used. BS EN 1744-8:2012 EN 1744-8:2012 (E) 6 6 Preparation of subsample Bulk samples shall be taken in accordance with EN 932-1 and reduced in accordance with EN 932-2 to produce a laboratory sample with a minimum mass as given in Table 1. Table 1 Minimum mass of laboratory sample
37、 Upper aggregate size, D, mm Minimum laboratory sample mass, kg CegA-int63 50 75 31,5 or less 20 30 Dry the laboratory sample at (110 5) C to constant mass. Weigh and record the dry mass as M0. Sieve the sample on the 63 mm and 4 mm sieves, using the EN 933-1 dry sieving method. Agitate with suffici
38、ent vigour to ensure complete separation of particles bigger than 4 mm. Weigh and record the mass of particles retained on the 63 mm sieve as M63and then discard them. Weigh and record the mass of the particles passing the 4 mm sieve as M4, and then discard them. Record the mass of the remaining sub
39、sample as M1. 7 Procedure 7.1 Further reduction of the subsample If necessary, further reduce the size of the remaining subsample to give at least 1 000 particles in accordance with EN 932-2. Table 2 gives guidance on the minimum mass required. Table 2 Guidance on the mass of at least 1 000 particle
40、s Upper aggregate size, D, mm Minimum subsample mass, kg 63 50 31,5 10 20 4 16 2 14 1 8 0,5 NOTE The actual mass required to give 1 000 particles depends upon the particle size distribution and particle density of the aggregate. Experience will allow test laboratories to estimate the mass required f
41、or aggregates that are tested routinely. If a reduced 4/63 mm size subsample is used, weigh and record the mass of the remaining subsample as M2. BS EN 1744-8:2012 EN 1744-8:2012 (E) 7 7.2 Separating into size fractions Sieve the 4/63 mm size subsample into the three size fractions in Table 3 using
42、the dry sieving procedure of EN 933-1. Table 3 Size fractions for initially separation, mm 4/16 16/32 32/63 Place each size fraction in a separate tray. NOTE 1 Sieving into size fractions makes sorting easier. NOTE 2 For some aggregates, there may not be any particles in the larger size fractions. N
43、OTE 3 If necessary, the supplementary test portion preparation method in Annex A (normative) can be used after this initial separation stage. 7.3 Separating metallic particles Spread the particles in the 32/63 mm size fraction onto a clean, flat surface and separate the metallic particles by hand. I
44、f necessary, use a small brush to clean finer particles from the metal pieces. NOTE Particles can also be washed with a minimum amount of water to aid separation of the finer particles. If water is used, the particles need to be dried to constant mass again before weighing. When it is not possible t
45、o separate the metallic fraction from the agglomerate particles, those agglomerates should be handled as metallic particles. Use the magnet to further separate the metallic particles into ferrous (magnetic) and non-ferrous (non-magnetic) particles. Place them in separate marked trays (MF1and MNF1).
46、Repeat this procedure with the 16/32 mm size fraction (MF2and MNF2) and then with the 4/16 mm size fraction (MF3and MNF3). 7.4 Weight of metallic particles Weigh the mass of the ferrous particles of each fraction (MF1, MF2and MF3). Sum the values and record the total mass as MF. Weigh the mass of th
47、e non-ferrous particles of each fraction (MNF1, MNF2and MNF3). Sum the values and record the total mass as MNF. 8 Calculation and expression of results Calculate the percentage by mass of each metallic constituent as follows: 1 FFMM100P= (1) 1NFFNMM100P= (2) BS EN 1744-8:2012 EN 1744-8:2012 (E) 8 wh
48、ere PFis the percentage by mass of ferrous particles; PNFis the percentage by mass of non-ferrous particles; MFis the mas of erous particles; MNFis the mass of non-ferrous particles; M1is the mass of remaining subsample as defined in Clause 6. If a reduced 4/63 mm size subsample is used, use the val
49、ue of M2instead of M1. Round the result to the nearest 0,1 %. 9 Test report 9.1 Required data The test report shall include the following information: a) reference to this European Standard; b) identification of the laboratory; c) identification of the sample; d) masses; subsample M1, reduced subsample M2(if used), laboratory sample M0, Mass of particles retained on 63 mm sieve M63and Mass of particles passing the 4 mm sieve M4; e) percentage by mass of ferrous particles
