prEN 933-8

SLOVENSKI STANDARD
01-februar-2009
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Tests for geometrical properties of aggregates - Part 8: Assessment of fines - Sand
equivalent test
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 8:
Beurteilung von Feinanteilen - Sandäquivalent verfahren
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 8:
Evaluation des fines - Equivalent de sable
Ta slovenski standard je istoveten z: prEN 933-8
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2008
ICS 91.100.15 Will supersede EN 933-8:1999
English Version
Tests for geometrical properties of aggregates - Part 8:
Assessment of fines - Sand equivalent test
Essais pour déterminer les caractéristiques géométriques Prüfverfahren für geometrische Eigenschaften von
des granulats - Partie 8: Evaluation des fines - Equivalent Gesteinskörnungen - Teil 8: Beurteilung von Feinanteilen -
de sable Sandäquivalent verfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 154.
If this draft becomes a European Standard, 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 standard without any alteration.
This draft European Standard was established by CEN 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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
: This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
Warning
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 933-8:2008: E
worldwide for CEN national Members.

Contents Page
Foreword . 3
1 Scope. 4
2 Normative references . 4
3 Definitions . 4
4 Principle . 5
5 Reagents . 5
6 Apparatus . 5
7 Preparation of test specimens . 11
8 Procedure . 12
8.1 Filling of the graduated cylinders . 12
8.2 Shaking the graduated cylinders . 12
8.3 Washing . 12
8.4 Measurements . 12
9 Calculation and expression of results . 14
10 Test report . 14
10.1 Required data . 14
10.2 Optional data . 14
Annex A (normative) Procedure for the determination of the sand equivalent value of the
0/4 mm fraction . 15
Annex B (informative) Example of a test data sheet . 16

Foreword
This document (prEN 933-8:2008) has been prepared by Technical Committee CEN/TC 154
“Aggregates”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 933-8:1999.
This European Standard is one of a series of standards for tests for geometrical properties of
aggregates. Test methods for other properties of aggregates are covered by Parts of the following
European Standards:
EN 932, Tests for general properties of aggregates
EN 1097, Tests for mechanical and physical properties of aggregates
EN 1367, Tests for thermal and weathering properties of aggregates
EN 1744, Tests for chemical properties of aggregates
EN 13179, Tests for filler aggregate used in bituminous mixtures
The other parts of EN 933 will be:
Part 1: Determination of particle size distribution — Sieving method
Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures
Part 3: Determination of particle shape — Flakiness index
Part 4: Determination of particle shape — Shape index
Part 5: Determination of percentage of crushed and broken surfaces in coarse aggregate particles
Part 6: Assessment of surface characteristics — Flow coefficient for aggregates
Part 7: Determination of shell content — Percentage of shells in coarse aggregates
Part 9: Assessment of fines — Methylene blue test
Part 10: Assessment of fines — Grading of filler aggregates (air jet sieving)
Part 11: Classification test for the constituents of coarse recycled aggregates
1 Scope
This Standard describes the reference method used for type testing and in cases of dispute for the
determination of the sand equivalent value of 0/2 mm fraction (for 0/4 mm, see annex A) in fine
aggregates or all-in 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. It applies to natural aggregates.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references, the latest edition of the publication referred to applies.
EN 932-2, Tests for general properties of aggregates — Part 2: Methods for reducing laboratory
samples
EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size
distribution — Test sieves, nominal size of apertures
EN 932-5, Tests for general properties of aggregates — Part 5: Common equipment and calibration
EN 1097-5, Tests for mechanical and physical properties of aggregates — Part 5: Determination of
the water content by drying in a ventilated oven
3 Definitions
For the purposes of this standard, the following definitions apply:
3.1
laboratory sample
sample intended for laboratory testing
3.2
test portion
sample used as a whole in a single test
3.3
test specimen
sample used in a single determination when a test method requires more than one determination of a
property
3.4
fines
particle size fraction of an aggregate which passes the 0,063 mm sieve
3.5
particle size fraction
fraction of an aggregate passing the larger of two sieves and retained on the smaller; the lower limit
can be zero
4 Principle
A test portion of aggregate with a maximum fines content of 10 % (either natural or obtained after
grading curve adjustment) and a small quantity of washing and flocculating solution are poured into a
graduated cylinder and are agitated to loosen the clay coatings from the coarser particles in the test
portion. The aggregate is then ‘irrigated’ using additional washing and flocculating solution forcing the
fine particles into suspension. After a fixed time, the sand equivalent value (SE) is calculated as the
height of sediment expressed as a percentage of the total height of sediment and suspension in the
cylinder.
5 Reagents
5.1 Concentrated solution, made up from:
a) crystalline calcium chloride, CaCl .6H O or anhydrous calcium chloride, CaCl ;
2 2 2
b) glycerine, 99 % glycerol, laboratory reagent quality;
c) formaldehyde solution, 40 % by volume, laboratory reagent quality;
d) distilled or demineralised water.
Dissolve (219 ± 2) g of crystalline calcium chloride in (350 ± 50) ml of distilled or demineralised water,
cool to room temperature and if necessary filter through a medium or coarse grade filter paper. Add
(480 ± 5) g of glycerine and (12,5 ± 0,5) g of formaldehyde solution and dilute to 1 l of solution with
distilled or demineralised water and mix thoroughly.
NOTE 1 219 g CaCl .6H 0 is equivalent to 111 g anhydrous calcium chloride CaCl .
2 2 2
NOTE 2 It is recommended that the concentrated solution is stored protected from light in glass or plastics
flasks containing (125 ± 1) ml.
NOTE 3 Sodium hypochlorite (bleach) with 2,6 % active chloride can be used instead of formaldehyde. In
case of dispute, use formaldehyde.
5.2 Washing and flocculating solution, prepared by diluting (125 ± 1) ml of concentrated
solution (5.1) to (5,00 ± 0,01) l using distilled or demineralised water.
NOTE In preparing the washing solution, the concentrated solution should first be vigorously shaken and
subsequently its container should be rinsed several times using distilled or demineralised water, pouring the
rinsing water into the 5 l flask before diluting to 5 l.
Washing solution shall not be used more than 28 days after preparation or if it is cloudy or contains
any precipitate or mould.
6 Apparatus
6.1 All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5.
6.2 Two graduated cylinders, of glass or clear plastic (see Figure 1) complete with rubber bungs
and with the following dimensions:
a) wall thickness, about 3 mm;
b) inside diameter (32,0 ± 0,5) mm;
c) height (430,00 ± 0,25) mm.
Each cylinder shall be clearly marked in two positions:
1) at (100,00 ± 0,25) mm from the base; and
2) at (380,00 ± 0,25) mm from the base.

Dimensions in millimetres
1 Circle mark
Figure 1 — Graduated cylinder
6.3 Test plunger assembly, (see Figure 2) comprising:
a) a rod (440,00 ± 0,25) mm long;
b) an end piece (25,0 ± 0,1) mm diameter, its lower surface being flat, smooth and perpendicular to
the rod axis and which includes three guides at the side for centring the plunger in the cylinder,
leaving a small clearance;
c) a collar, (10,0 ± 0,1) mm thick, suitable for use with the graduated cylinder, acting as a guide for
the rod and, at the same time, used to indicate the distance the test plunger is inserted inside the
cylinder. The collar shall include a screw which enables it to be locked onto the rod of the test
plunger and the collar shall also have a slot for a rule;
d) a plunger head, fixed to the upper end of the rod, to give the test plunger assembly, excluding the
collar, a total mass of (1,00 ± 0,01) kg.
The immersed parts of the plunger assembly shall be made from non-corrodible metal.
NOTE Before first use of a test plunger or a graduated cylinder, the plunger assembly should be placed in
the empty cylinder. With the collar resting on the rim of the cylinder the distance between the upper face of the
collar and the lower face of the plunger head should not exceed 0,5 mm. If this clearance exceeds 0,5mm or if
the end piece does not reach the bottom of the cylinder, this combination of test plunger and graduated cylinder
should not be used.
6.4 Stopclock(s), readable to 1 s.
6.5 500 mm rule, graduated in millimetres.
6.6 Test sieves, 0,063 and 2 mm conforming to EN 933-2 with, if necessary, a guard sieve.
6.7 Sieve brush.
6.8 Spatula.
6.9 Washing tube, (see Figure 3) comprising a rigid tube of non-corrodible metal with the following
dimensions:
a) outside diameter (6,0 ± 0,5) mm;
b) inside diameter (4,0 ± 0,2) mm;
c) length about 500 mm.
The washing tube shall be fitted with a tap at the top. The bottom end of the tube (see Figure 4) shall
be conical or wedge-shaped, made from
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