EN 933-10-2009 pdf download.Tests for geometrical properties of aggregates – Part 10:Assessment of fines – Grading of filler aggregates (air jet sieving).
This EN 933-10 describes the reference method used for type testing and in cases of dispute for determining the particle size distribution up to 2 mm size of natural or manufactured origin filler aggregate using air jet sieving. 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 A wet sieving procedure conforming to EN 933.1 can be used as an alternative method. However. this procedure is not applicable for mixed filler.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 932-2, Tests for general properties of aggregates — Part 2: Methods for reducing labcxatoty samples
EN 932-5, Tests for general properties of aggregates — Part 5: Common equipment and calibration
EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size
distribution — Test sieves, nominal size of apertures
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
filler aggregate
aggregate, most of which passes a 0,063 mm sieve
3.2
‘aboratory sample
sample intended for laboratory testing
3.3
test portion
sample used as a whole In a single test
3.4
constant mass
successive weighings after drying at least 1 h apart not differing by more than 0,1 %
NOTE In many cases nstant 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 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
The test consists of dividing up and separating, by means of a series of sieves, a filler aggregate into several granular classifications of decreasing sizes. The aperture sizes and the number of sieves are
EN 933-10:2009 (E)
specified in 52. The test is in particular well suited for materials which when dry neither tend to agglomeration nor to electrostatic charge.
The method adopted is dry air jet sieving.
The mass of the particles passing each sieve is related to the initial mass of the material. The percentages obtained are used either in their numerical form or in a graphical form.
5 Apparatus
5.1 All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5.
5.2 Test sieves, with round frame of 200 mm nominal diameter and square aperture sizes of
0.063 mm. 0,125 mm and 2 mm in accordance with EN 933-2.
5.3 Air jet sieving apparatus, (general form shown in Figure 1) with a pressure difference of
(3,0 ± 0,5) kPa across the sieve, during the test procedure.
5.4 Ventilated oven, thermostatically controlled to maintain a temperature of (110 ± 5) C or other suitable equipment for drying the finer aggregate, if it does not cause any particle breakdown.
5.5 Balance, accurate to ± 0,1 % of the test portion mass.
5.6 Soft brush,
5.7 Plastic hammer (optional).
6 Preparation of test portions
Laboratory samples shall be reduced in accordance with EN 932-2 to produce test portions.
The test portion shall have a mass of (50,0± 1,0) g.
Dry the test portion at (110 ± 5) C to constant mass. Allow to cool, weigh and record as M
7 Procedure
Fit the 0,063 mm test sieve onto the apparatus and transfer all of the test portion onto the sieve
After covering the sieve with the plexiglass lid, operate the air jet sieving apparatus until complete sieving is achieved. A minimum of 3 mm Is required. During sieving the pressure difference to normal air pressure in the air jet sieving apparatus shall be (3,0 ± 0,5) kPa.
NOTE 1 Any agglomeration of particles during sieving can be alleviated by tapping the plastic hammer at the centre of the plexiglass lid.
NOTE 2 The sieving process s complete when the mass of retained matenal does not change more than 0.1 % of the mass of the test portion during 1 mm of this sieving operation,
NOTE 3 In many cases sieving can be completed after sieving to.’ a pre-determined time. Test laboratories can determine the time required to fulfil the requirements of Clause 7 for completion of sieving for specific types and sizes of test portions in the air jet sieving apparatus used.EN 933-10-2009 pdf download.

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