EN 1744-8-2012 pdf download.Tests for chemical properties of aggregates – Part 8: Sorting test to determine metal content of Municipal Incinerator Bottom Ash (MIBA) Aggregates.
This EN 1744-8 specifies a simple method for the examination of Municipal Incinerator Bottom Ash (MIBA) Aggregates 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 other 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 preparation of a test portion containing agglomerated partides, 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, 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 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: Determination 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 procedure
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 predetermined period in a specified oven at (110±5) C. Test taboratones can determine the time required to
EN 1744-8:2012 (E)
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 fraction (dilDi)
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 partides are then separated 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 I For the purpose of ths standard, ferrous partIcles are to be understood as particles attracted by the hand held magnet and non-ferrous particles are metallic non-ferrous particles
NOTE 2 Aluminiumlalloy 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, those 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, 16mm and 4 mm size conforming to EN 933-2.
An 8 mm size test sieve is also required if the supplementary 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 containers.
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
60kg.
5.7 Brushes, for cleaning the sieves and the sieved partides.
5.8 Sieving machine, (optional).
5.9 Laboratory crusher, if the supplementary test portion preparation method in Annex A (normative) is used.EN 1744-8-2012 pdf download.