prEN 13055

SLOVENSKI STANDARD
01-september-2021
Lahki agregati
Lightweight aggregates
Leichte Gesteinskörnungen
Granulats légers
Ta slovenski standard je istoveten z: prEN 13055
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2021
ICS 91.100.15 Will supersede EN 13055:2016
English Version
Lightweight aggregates
Granulats légers Leichte Gesteinskörnungen
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-CENELEC
Management 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13055:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, symbols and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Symbols and abbreviations . 10
4 Characteristics . 11
4.1 Fineness, particle shape, size and density . 11
4.1.1 Loose bulk density . 11
4.1.2 Particle density of LWA . 11
4.1.3 Particle density of LWA fillers . 11
4.1.4 Aggregate size . 11
4.1.5 Grading . 11
4.1.6 Particle shape . 11
4.2 Cleanliness . 12
4.3 Water absorption and suction . 12
4.3.1 Water absorption of LWA . 12
4.3.2 Water content of LWA . 12
4.3.3 Water suction height of coarse LWA . 12
4.4 Resistance to fragmentation and crushing . 12
4.4.1 Bulk crushing resistance of coarse LWA . 12
4.4.2 Resistance to fragmentation of coarse LWA . 12
4.4.3 Compressibility and confined compressive strength of LWA . 12
4.4.4 Cyclic load shear strength of LWA . 12
4.5 Volume stability of coarse LWA . 12
4.6 Resistance to polishing, abrasion and wear . 12
4.6.1 Resistance to polishing . 12
4.6.2 Resistance to wear by abrasion from studded tyres . 13
4.6.3 Resistance to wear . 13
4.7 Resistance to thermal shock . 13
4.8 Stiffening properties . 13
4.9 Porosity and volume of voids . 13
4.10 Affinity to bituminous binders . 13
4.11 Water solubility . 13
4.12 Composition and content . 13
4.12.1 Content of chloride . 13
4.12.2 Content of acid-soluble sulphate . 13
4.12.3 Total sulphur content . 13
4.13 Loss on ignition . 14
4.14 Durability against freeze and thaw of coarse LWA . 14
5 Testing, assessment and sampling methods . 14
5.1 Sampling and sample reduction . 14
5.2 Quantity of test specimens . 14
5.3 Loose bulk density . 14
5.4 Particle density of LWA . 14
5.5 Particle density of LWA fillers . 14
5.6 Aggregate size . 14
5.7 Grading of LWA . 14
5.8 Grading of LWA fillers . 14
5.9 Particle shape . 15
5.10 Cleanliness . 15
5.11 Water absorption of LWA . 15
5.12 Water content of LWA . 15
5.13 Water suction height of coarse LWA . 15
5.14 Bulk crushing resistance of coarse LWA . 15
5.15 Resistance to fragmentation of coarse LWA . 15
5.16 Compressibility and confined compressive strength of LWA . 15
5.17 Cyclic load shear strength of LWA . 15
5.18 Resistance to disintegration of coarse LWA . 15
5.19 Resistance to polishing . 15
5.20 Resistance to wear by abrasion from studded tyres . 15
5.21 Resistance to wear . 16
5.22 Resistance to thermal shock . 16
5.23 Stiffening properties . 16
5.24 Porosity and volume of voids . 16
5.25 Affinity to bituminous binders. 16
5.26 Water solubility . 16
5.27 Content of chloride . 16
5.28 Content of acid-soluble sulphate . 16
5.29 Total sulphur content . 16
5.30 Loss on ignition . 16
5.31 Durability against freeze and thaw of coarse LWA . 16
6 Assessment and verification of constancy of performance - AVCP . 17
6.1 General . 17
6.2 Assessment of performance . 17
6.2.1 General . 17
6.2.2 Test samples, testing and assessment criteria . 18
6.3 Verification of constancy of performance . 19
6.3.1 Factory production control (FPC) . 19
6.3.2 Initial inspection of factory and of FPC . 23
6.3.3 Continuous surveillance of FPC . 23
7 Product designation. 23
7.1 Lightweight aggregates codes, sources and products . 23
7.2 Designation . 25
8 Marking, labelling and packaging . 25
Annex A (normative) Standards covering other applications of LWA . 26
Annex B (normative) Determination of bulk crushing resistance . 27
B.1 Principle . 27
B.2 Apparatus . 27
B.3 Preparation of test specimens . 28
B.4 Procedure . 28
B.4.1 Procedure 1. 28
B.4.2 Procedure 2 . 28
B.4.3 Procedure 3 . 28
B.5 Calculation and expression of results . 29
B.6 Test report . 29
Annex C (normative) Mass conversion . 33
C.1 Background . 33
C.2 Calculation . 33
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No 305/2011 . 34
ZA.1 Scope and relevant characteristics . 34
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 41
ZA.3 Assignment of AVCP tasks . 41
Bibliography . 44

European foreword
This document prEN 13055 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 the withdrawn harmonized standards:
EN 13055-1:2002, Lightweight aggregates — Part 1: Lightweight aggregates for concrete, mortar and
grout;
EN 13055-2:2004, Lightweight aggregates — Part 2: Lightweight aggregates for bituminous mixtures and
surface treatments and for unbound and bound applications.
This document will also supersede the non-harmonized standard:
— EN 13055:2016, Lightweight aggregates.
For information, EN 13055:2016 was published, but this version has failed to be cited in the OJEU.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Regulation(s).
For relationship with Regulation (EU) No 305/2011 on construction products (CPR), see informative
Annex ZA, which is an integral part of this document.
In comparison with the previous editions (2002, 2004 and 2016), the following technical modifications
have been made:
a) Merging of the former two parts, changing the title and clarifying the scope of the standard;
b) Reorganization, alignment and revision of terminology and text according to the Construction
Product Regulation, templates for harmonized standards, AVCP clauses and Annex ZA and in line
with the CEN/TC 154 approach for all aggregate product standards;
c) All normative references are made dated references;
d) Common terms and definitions are in accordance with prEN 17555-1:2021 Aggregates for
construction works — Part 1: Characteristics;
e) Previous Table 1 with sieve sized for specifying aggregate size replaced by a normative reference to
EN 933-2:2020;
f) Percentage of crushed particles is deleted as a characteristic and shall no longer be determined. (This
is in accordance with the revised answer to the mandate);
g) Deleting the clauses related to thermal conductivity;
h) Essential characteristics without a European test method have no longer been considered;
i) Replacement of 3 former test method annexes with normative references to separate EN test method
standards;
j) Information from the previous annex on test frequencies for factory production control are now
included in new Clause 6 on AVCP;
k) The previous annex on source material is deleted, see Bibliography;
l) The previous annex on chemical constituents and organic components is deleted. Text on chlorides
(because it is a concrete matter), alkali aggregate reaction and sulphates is deleted.
m) Referring certain LWA for specific applications to other aggregate standards in a normative Annex A
Standards covering other applications of LWA;
n) Annex B Determination of bulk crushing resistance includes a new procedure 3 for factory production
control of material up to 63 mm;
o) New normative Annex C on mass conversion;
p) Deleting previous annex on Determination of water absorption for fine LWA as a result of the ongoing
revision of prEN 1097-6:2020;
Characteristics for other aggregates are specified in the following European Standards:
— prEN 13383-1:2021, Armourstone — Part 1: Characteristics;
— prEN 13450-1:2021, Aggregates for railway ballast — Part 1: Characteristics;
— prEN 17555-1:2021, Aggregates for construction works — Part 1: Characteristics.
Some LWA for specific applications are covered in separate European product Standards, see normative
Annex A.
1 Scope
This document specifies the characteristics of lightweight aggregates (LWA) and LWA fillers and mixtures
of them intended to be used in concrete, mortar and grout, bituminous mixtures, surface treatments and
for unbound and hydraulically bound applications in construction works.
This document covers LWA and LWA fillers from mineral materials having particle densities less or equal
3 3 3 3
to 2000 kg/m (2,000 Mg/m ) or loose bulk densities less or equal to 1200 kg/m (1,200 Mg/m ).
With regard to the aggregate size, this document covers LWA: fine lightweight aggregate (see 3.1.7),
coarse lightweight aggregate (hereafter called coarse LWA) (see 3.1.8), all-in lightweight aggregate
(hereafter called all-in LWA) (see 3.1.9) and LWA fillers (see 3.1.10).
With regard to the material source and production technique, this document covers LWA and LWA fillers:
a) of natural origin (see 3.1.2),
b) manufactured from natural materials (see 3.1.3),
c) manufactured from by-products of industrial processes (see 3.1.4) or from recycled source materials
(see 3.1.5), and
d) as by-products of industrial processes (see 3.1.4).
Limits given to densities are related to some test methods which might not be applicable to some
lightweight aggregates and lightweight aggregate fillers. This limitation is purely based on technical
reasons and not to exclude any products from the market.
This document also specifies procedures for assessment and verification of constancy (AVCP) of
performance of characteristics of LWA and LWA fillers.
This document does not cover LWA and LWA fillers of recycled aggregates from construction and
demolition waste and Municipal Solid Waste Incinerator Bottom Ash (MIBA) (covered by
prEN 17555-1:2021).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 932-1:1996, Tests for general properties of aggregates — Part 1: Methods for sampling
EN 932-2:1999, Tests for general properties of aggregates — Part 2: Methods for reducing laboratory
samples
EN 932-5:2012 , Tests for general properties of aggregates — Part 5: Common equipment and calibration
EN 933-1:2012, Tests for geometrical properties of aggregates — Part 1: Determination of particle size
distribution — Sieving method
EN 933-2:2020, Tests for geometrical properties of aggregates — Part 2: Determination of particle size
distribution — Test sieves, nominal size of apertures

As impacted by corrigendum EN 932-5:2012/AC:2014.
EN 933-10:2009, Tests for geometrical properties of aggregates — Part 10: Assessment of fines — Grading
of filler aggregates (air jet sieving)
EN 1097-1:2011, Tests for mechanical and physical properties of aggregates — Part 1: Determination of
the resistance to wear (micro-Deval)
EN 1097-2:2020, Tests for mechanical and physical properties of aggregates — Part 2: Methods for the
determination of resistance to fragmentation
EN 1097-3:1998, Tests for mechanical and physical properties of aggregates — Part 3: Determination of
loose bulk density and voids
EN 1097-4:2008, Tests for mechanical and physical properties of aggregates — Part 4: Determination of
the voids of dry compacted filler
EN 1097-5:2008, Tests for mechanical and physical properties of aggregates — Part 5: Determination of
the water content by drying in a ventilated oven
prEN 1097-6:2020, Tests for mechanical and physical properties of aggregates — Part 6: Determination of
particle density and water absorption
prEN 1097-7:2020, Tests for mechanical and physical properties of aggregates — Part 7: Determination of
the particle density of filler — Pyknometer method
EN 1097-8:2020, Tests for mechanical and physical properties of aggregates — Part 8: Determination of
the polished stone value
EN 1097-9:2014, Tests for mechanical and physical properties of aggregates — Part 9: Determination of
the resistance to wear by abrasion from studded tyres — Nordic test
EN 1097-10:2014, Tests for mechanical and physical properties of aggregates — Part 10: Determination of
water suction height
EN 1097-11:2013, Tests for mechanical and physical properties of aggregates — Part 11: Determination of
compressibility and confined compressive strength of lightweight aggregates
EN 1367-5:2011, Tests for thermal and weathering properties of aggregates — Part 5: Determination of
resistance to thermal shock
EN 1367-7:2014, Tests for thermal and weathering properties of aggregates — Part 7: Determination of
resistance to freezing and thawing of Lightweight aggregates
EN 1367-8:2014, Tests for thermal and weathering properties of aggregates — Part 8: Determination of
resistance to disintegration of Lightweight Aggregates
EN 1744-1:2009+A1:2012, Tests for chemical properties of aggregates — Part 1: Chemical analysis
EN 12697-11:2020, Bituminous mixtures — Test methods — Part 11: Determination of the affinity between
aggregate and bitumen
EN 13179-1:2013, Tests for filler aggregate used in bituminous mixtures — Part 1: Delta ring and ball test
EN 13286-7:2004, Unbound and hydraulically bound mixtures — Part 7: Cyclic load triaxial test for
unbound mixtures
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
lightweight aggregate
granular material of mineral origin having a particle density less or equal to (≤) 2000 kg/m (2,000
3 3 3
Mg/m ) or a loose bulk density less or equal to (≤) 1200 kg/m (1,200 Mg/m )
3.1.2
natural lightweight aggregate
aggregate from mineral sources which has been subjected to nothing more than mechanical processing
and sometimes washing
[SOURCE: prEN 17555-1:2021, 3.1.2]
3.1.3
manufactured lightweight aggregate
aggregate of mineral origin resulting from an industrial process involving thermal or other modification
[SOURCE: prEN 17555-1:2021, 3.1.3, modified — Note to entry has been deleted.]
3.1.4
by-product lightweight aggregate
aggregate of mineral origin from an industrial process which subsequently has been subjected to nothing
more than mechanical processing
3.1.5
recycled source material
raw material of inorganic or mineral origin from waste sources for use in manufactured LWA
3.1.6
recycled aggregate
aggregate resulting from processing of inorganic or mineral material previously used in construction
3.1.7
fine lightweight aggregate
designation given to the smaller aggregate sizes with D less than or equal to 4 mm and d greater than or
equal to 0 mm
[SOURCE: prEN 17555-1:2021, 3.1.12]
3.1.8
coarse lightweight aggregate
designation given to the larger aggregate sizes with D greater than 4 mm and less than 90 mm and d
greater than or equal to 1 mm
[SOURCE: prEN 17555-1:2021, 3.1.8]
3.1.9
all-in lightweight aggregate
processed aggregate consisting of a mixture of coarse and fine aggregates with D greater than 4 mm and
d equal to 0 mm
Note 1 to entry: It can be produced without separating into coarse and fine fractions or it can be produced by
combining coarse and fine aggregates.
[SOURCE: prEN 17555-1:2021, 3.1.13]
3.1.10
lightweight aggregate filler
fine lightweight aggregate, most of which passes a 0,063 mm sieve
3.1.11
grading
particle size distribution expressed as the percentage by mass passing a specified set of sieves
[SOURCE: prEN 17555-1:2021, 3.1.6, modified — Note to entry has been deleted.]
3.1.12
aggregate size
designation of aggregate in terms of lower (d) and upper (D) sieve sizes expressed as d/D, where d/D is
less than 0,72
Note 1 to entry: Sieve sizes are selected from those in EN 933-2:2020.
Note 2 to entry: The designation accepts the presence of some particles which are retained on the upper sieve
(oversize) and some particles which pass the lower sieve (undersize).
[SOURCE: prEN 17555-1:2021, 3.1.5]
3.1.13
constant mass
successive weighings after drying and conditioning at least 1 h apart not differing by more than 0,1 %
3.2 Symbols and abbreviations
For the purposes of this document, the following symbols and abbreviations apply.
AVCP Assessment and Verification of Constancy of Performance
d Lower sieve size designation in mm
D Upper sieve size designation in mm
DoP Declaration of Performance
FPC Factory production control
LWA Lightweight aggregate(s)
PSV Polished stone value
4 Characteristics
4.1 Fineness, particle shape, size and density
4.1.1 Loose bulk density
Loose bulk density of LWA and LWA fillers shall be determined according to 5.3. Measured values shall
3 3
be in the range of ± 15 % with a maximum of ± 100 kg/m (0,100 Mg/m ) of the declared value. The
3 3
performance shall be expressed as a level in kg/m (Mg/m ).
4.1.2 Particle density of LWA
Particle density of LWA shall be determined according to 5.4. Measured values shall be in the range
3 3
of ± 15 % with a maximum of ± 150 kg/m (0,150 Mg/m ) of the declared value. The performance shall
3 3
be expressed as a level in kg/m (Mg/m ).
4.1.3 Particle density of LWA fillers
Particle density of LWA fillers shall be determined according to 5.5. Measured values shall be in the range
3 3
of ± 15 % with a maximum of ± 150 kg/m (0,150 Mg/m ) of the declared value. The performance shall
3 3
be expressed as a level in kg/m (Mg/m ).
4.1.4 Aggregate size
The performance of LWA related to its aggregate size (d/D) is the quantity of aggregate passing the lower
(undersize) sieve (d) and retained on the upper (oversize) sieve (D) and shall be determined respectively,
as:
— the lower sized aggregate (d), and
— the upper sized aggregate (D).
The quantity of the lower sized LWA shall be determined according to 5.6. The quantity obtained shall
not exceed 15 % by mass.
The quantity of the upper sized LWA shall be determined according to 5.6. The quantity obtained shall
not exceed 10 % by mass.
The performance shall be expressed as d/D in mm/mm. The ratio d/D shall not exceed 0,72.
4.1.5 Grading
4.1.5.1 Grading of LWA
Grading of LWA shall be determined according to 5.7. The performance shall be expressed as particle size
distribution.
4.1.5.2 Grading of LWA fillers
Grading of LWA fillers shall be determined according to 5.8. The performance shall be expressed as
particle size distribution.
4.1.6 Particle shape
Particle shape of LWA shall be determined according to 5.9. The particle shape shall be described.
4.2 Cleanliness
Cleanliness is expressed through the absence of organic components in natural LWA i.e. which alter the
rate of setting and hardening of concrete, mortar and grout shall be determined according to 5.10. The
cleanliness shall be described.
4.3 Water absorption and suction
4.3.1 Water absorption of LWA
Water absorption of LWA shall be determined according to 5.11. The performance shall be expressed as
a level in % by mass.
4.3.2 Water content of LWA
The water content of LWA shall be determined according to 5.12. The performance shall be expressed as
a level in % by mass.
4.3.3 Water suction height of coarse LWA
Water suction height of coarse LWA shall be determined according to 5.13. The performance shall be
expressed as a level in mm.
4.4 Resistance to fragmentation and crushing
4.4.1 Bulk crushing resistance of coarse LWA
Bulk crushing resistance of coarse LWA shall be determined according to 5.14. The performance shall be
expressed as a level in N/mm .
4.4.2 Resistance to fragmentation of coarse LWA
Resistance to fragmentation of coarse LWA shall be determined according to 5.15. The performance shall
be expressed as a level in % by mass.
4.4.3 Compressibility and confined compressive strength of LWA
The compressibility and confined compressive strength of LWA shall be determined according to 5.16.
The compressibility performance shall be expressed as a level in %. The confined compressive strength
performance shall be expressed as a level in MPa.
4.4.4 Cyclic load shear strength of LWA
The cyclic load shear strength is expressed through resilient modulus and shall be determined by cyclic
triaxial tests according to 5.17. The performance shall be expressed as a level in MPa.
4.5 Volume stability of coarse LWA
Volume stability is expressed through resistance to disintegration of coarse LWA and shall be determined
according to 5.18. The performance shall be expressed as a level in % by mass.
4.6 Resistance to polishing, abrasion and wear
4.6.1 Resistance to polishing
Resistance to polishing of coarse LWA shall be determined according to 5.19. The performance shall be
expressed as a level.
4.6.2 Resistance to wear by abrasion from studded tyres
Resistance to wear by abrasion from studded tyres of coarse LWA in surface treatments shall be
determined according to 5.20. The performance shall be expressed as a level.
4.6.3 Resistance to wear
Resistance to wear of coarse LWA shall be determined according to 5.21 The performance shall be
expressed as a level in % by mass.
4.7 Resistance to thermal shock
Resistance to thermal shock of coarse LWA shall be determined according to 5.22. The performance shall
be expressed as a level in % by mass.
4.8 Stiffening properties
Stiffening properties of LWA fillers shall be determined according to 5.23. The performance shall be
expressed as a level.
4.9 Porosity and volume of voids
Porosity and volume of voids are expressed through voids of dry compacted LWA fillers and shall be
determined according to 5.24. The performance shall be expressed as a level in % by volume.
4.10 Affinity to bituminous binders
Affinity between coarse LWA and bitumen shall be determined according to 5.25. The performance shall
be expressed as a level in %.
4.11 Water solubility
Water solubility of LWA fillers shall be determined according to 5.26. The performance shall be expressed
as a level in % by mass.
4.12 Composition and content
4.12.1 Content of chloride
The content of chloride shall be determined according to 5.27. The performance shall be expressed as a
level in % by mass.
For mass conversion, see Annex C.
4.12.2 Content of acid-soluble sulphate
The content of acid-soluble sulphate shall be determined according to 5.28. The performance shall be
expressed as a level in % by mass.
For mass conversion, see Annex C.
4.12.3 Total sulphur content
The total sulphur content shall be determined according to 5.29. The performance shall be expressed as
a level in % by mass.
For mass conversion, see Annex C.
4.13 Loss on ignition
Loss on ignition shall be determined according to 5.30. The performance shall be expressed as a level in
% by mass.
For mass conversion, see Annex C.
4.14 Durability against freeze and thaw of coarse LWA
Durability is expressed through freezing and thawing resistance of coarse LWA and shall be determined
according to 5.31. The performance shall be expressed as a level in % by mass.
5 Testing, assessment and sampling methods
5.1 Sampling and sample reduction
Where sampling and sample reduction is not mentioned specifically in the test method, sampling shall be
carried out in accordance with EN 932-1:1996, and necessary sample reduction shall be carried out in
accordance with EN 932-2:1999.
To ensure a representative sample, segregation and degradation shall be minimized.
5.2 Quantity of test specimens
The test specimen quantity specified in any test method shall, if not taken into account for LWA, be
corrected on the basis of loose bulk density.
5.3 Loose bulk density
The loose bulk density of LWA and LWA fillers shall be determined in accordance with EN 1097-3:1998.
The container shall be filled using a standard scoop held centrally over the container and without
touching it.
5.4 Particle density of LWA
The particle density of LWA shall be determined in accordance with prEN 1097-6:2020.
3 3
NOTE This test method does not work for all LWA having a bulk density of less than 150 kg/m (0,150 Mg/m ).
5.5 Particle density of LWA fillers
The particle density of LWA fillers shall be determined in accordance with prEN 1097-7:2020.
5.6 Aggregate size
The lower and upper aggregate size shall be determined using sieving according to EN 933-1:2012 in
terms of d in mm as the lower limit designation sieve and D in mm as the upper limit designation sieve
between which most of the particle size distribution lies. Sieve sizes shall be selected from those given in
EN 933-2:2020.
5.7 Grading of LWA
The particle size distribution of LWA shall be determined together with the content of fines by dry sieving
in accordance with EN 933-1:2012.
5.8 Grading of LWA fillers
The particle size distribution of LWA fillers shall be determined in accordance with EN 933-10:2009.
5.9 Particle shape
The particle shape of LWA shall be described.
5.10 Cleanliness
The presence of harmful organic components in natural LWA i.e. which alter the rate of setting and
hardening of concrete, mortar and grout shall be determined in accordance with
EN 1744-1:2009+A1:2012.
5.11 Water absorption of LWA
The water absorption of LWA shall be determined in accordance with prEN 1097-6:2020.
5.12 Water content of LWA
The water content of LWA shall be determined in accordance with EN 1097-5:2008.
5.13 Water suction height of coarse LWA
The water suction height of coarse LWA shall be determined in accordance with EN 1097-10:2014.
5.14 Bulk crushing resistance of coarse LWA
The bulk crushing resistance of coarse LWA shall be determined in accordance with Annex B.
NOTE 1 The bulk crushing resistance is intended only for factory production control.
NOTE 2 There is no simple correlation between the results obtained by the three procedures in Annex B.
5.15 Resistance to fragmentation of coarse LWA
The resistance to fragmentation (Los Angeles) of coarse LWA shall be determined in accordance with
EN 1097-2:2020.
NOTE This test method does not work for all types of LWA.
5.16 Compressibility and confined compressive strength of LWA
The compressibility and confined compressive strength of LWA shall be determined in accordance with
EN 1097-11:2013.
5.17 Cyclic load shear strength of LWA
The resilient modulus shall be determined by cyclic triaxial test in accordance with EN 13286-7:2004.
5.18 Resistance to disintegration of coarse LWA
The resistance to disintegration of coarse LWA shall be determined in accordance with EN 1367-8:2014.
5.19 Resistance to polishing
The polished stone value (PSV) of coarse LWA shall be determined in accordance with EN 1097-8:2020.
5.20 Resistance to wear by abrasion from studded tyres
The resistance to abrasion from studded tyres of coarse LWA shall be determined in accordance with
EN 1097-9:2014.
NOTE The expression “Nordic abrasion value(s)” is used in the referred test standard.
5.21 Resistance to wear
The resistance to wear (micro-Deval) of coarse LWA shall be determined in accordance with
EN 1097-1:2011.
NOTE This test method does not work for all types of LWA.
5.22 Resistance to thermal shock
The resistance to thermal shock of coarse LWA shall be determined in accordance with EN 1367-5:2011.
5.23 Stiffening properties
The stiffening properties of LWA fillers in bituminous mixtures shall be determined in accordance with
EN 13179-1:2013.
5.24 Porosity and volume of voids
The voids of dry compacted LWA fillers shall be determined in accordance with EN 1097-4:2008.
5.25 Affinity to bituminous binders
The affinity between coarse LWA and bitumen shall be determined in accordance with
EN 12697-11:2020.
5.26 Water solubility
The water solubility of LWA fillers used in bituminous mixtures shall be determined in accordance with
EN 1744-1:2009+A1:2012.
5.27 Content of chloride
The water-soluble chloride ion content shall be determined in accordance with
EN 1744-1:2009+A1:2012.
5.28 Content of acid-soluble sulphate
The acid-soluble sulphate content shall be determined in accordance with EN 1744-1:2009+A1:2012.
5.29 Total sulphur content
The total sulphur content shall be determined in accordance with EN 1744-1:2009+A1:2012.
5.30 Loss on ignition
The loss on ignition of by-products of industrial processes shall be determined in accordance with
EN 1744-1:2009+A1:2012.
5.31 Durability against freeze and thaw of coarse LWA
The resistance to freezing and thawing of coarse LWA having a loose bulk density of not less than
3 3
150 kg/m (0,150 Mg/m ) shall be determined in accordance with EN 1367-7:2014.
Alternatively, aggregates can be assessed on the basis of satisfactory service record of performance.
6 As
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