EN 933-11-2009 pdf download.Tests for geometrical properties of aggregates – Part 11:Classification test for the constituents of coarse recycled aggregate.
This EN 933-11 describes a simple method for the examination of coarse recycled aggregates for the purpose of identifying and estimating the relative proportions of constituent materials. This reference test method should be used for type testing and in case of dispute. 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 1 This method is not appropriate for hghtweight aggregates covered by EN 13055 senes.
NOTE 2 If dangerous substances are found in while carrying out this method, they should be dealt with in accordance with regulations in the place of use.
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 932-1. Tests for general properties of aggregates — Part I — 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 93 3-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size distribution — Test sieves. nomioal size of apertures
3 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply:
3.1
aggregate size
designation of aggregate in terms of lower (d) and upper (0) sieve sizes expressed as dID
NOTE This designation accepts the presence of some particles which will be retained on the upper sieve (oversize) and some which will pass the lower sieve (undersize).
3.2
particle size fraction dID
fraction of an aggregate passing the larger (0,) of two sieves and retained on the smaller (d1)
3.3
constant mass
successive weighings after drying at least 1 h apart not differing by more than 0,1 %
NOTE 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 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.
3.4
floating particles
particles that float in water
3.5
test portion
sample used as a whole in a single test
4 Principle
The test consists of hand sorting particles from a test portion of coarse recycled aggregate into a list of constituents.
The proportion of each constituent in the test portion Is then determined and expressed as a percentage by mass, except for the proportion of floating particles which is expressed as a volume by mass.
5 Apparatus
Unless otherwise stated, all apparatus shall conform to the general requirements of EN 932-5.
5.1 Test sieves, 63 mm and 4 mm conforming to EN 933-2.
5.2 Tightly fitting pan and lid, for the sieves.
5.3 VentIlated oven, thermostatically controlled to maintain a temperature of (40 ± 5) C or
(110± 5) °C.
5.4 Balance or scale, of suitable capacity and readable to 0,1g.
5.5 Trays
5.6 Brushes
5.7 Sieving machine, optional.
5.8 Watertight tank, of suitable capacity.
5.9 Stirrer
5.10 Dry soft absorbent rag
5.11 Graduated measuring cylinder, of suitable capacity, graduated to I or 5 cm3 (depending on the
required precision for volume measurement).
5.12 Plunger, for the graduated cylinder.
7 Procedure
Separate and retain clay and soil from the test portion and put it in a tray.
Immerse the rest of the test portion into the filled watertight tank and stir in order to wash the particles and release the floating ones. Collect these floating particles and determine their volume VFL in cm3. For this purpose, gently surface dry them using the dry absorbent rag, then introduce them into the graduated cylinder filled with a known volume of water, sufficient to allow their total immersion. Use the plunger to achieve total immersion of the floating particles alone (see Figure 1). viz, do not immerse the plunger itself or entrap air, and use the cylinder gradation to assess the resulting volume increase.
Collect the non-floating particles and dry them apart at same temperature as before to constant mass. Spread these particles on a flat surface and separate by hand those belonging to constituent X as defined in Table 2. Put them in the tray together with the soil and the clay. Weigh and record the combined mass of particles as M.EN 933-11-2009 pdf download.
EN 933-11-2009 pdf download
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