ISO 19595:2017

Natural aggregates for concrete

ISO 19595:2017 specifies the properties and requirements of aggregates obtained by processing natural materials and mixtures of these aggregates for use in concrete. It is applicable to aggregates with an oven-dried particle density greater than 2,00 Mg/m3 (2 000 kg/m3) in accordance with ISO 22965 (all parts). ISO 19595:2017 incorporates a general requirement that natural aggregates are not intended to release any harmful substances in excess of the maximum permitted levels specified for the material or permitted in the national regulations of the place in use. National provisions, preferably given in a national annex or a project specification, can specify additional or deviating requirements. NOTE Requirements for the end use of aggregates in concrete are specified in ISO 22965 (all parts).

Granulats pour béton

General Information

• Status: Published
• Publication Date: 11-Jul-2017
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: ISO/TC 71/SC 3 - Concrete production and execution of concrete structures
• Drafting Committee: ISO/TC 71/SC 3 - Concrete production and execution of concrete structures
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 31-May-2023

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19595
First edition
2017-07
Natural aggregates for concrete
Granulats pour béton
Reference number
ISO 19595:2017(E)
©
ISO 2017

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ISO 19595:2017(E)

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© ISO 2017, Published in Switzerland
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ISO 19595:2017(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
5 Geometrical requirements . 3
5.1 General . 3
5.2 Aggregate sizes . 3
5.3 Grading. 4
5.3.1 General. 4
5.3.2 Coarse aggregates . 4
5.3.3 Fine aggregates . 5
5.3.4 All-in aggregates . 5
5.3.5 Special use aggregates and declared grading categories . 6
5.3.6 Grading for filler aggregate . 6
5.3.7 Natural graded 0/8 mm aggregates . 6
5.4 Fines content . 7
5.5 Fines quality . 7
5.6 Particle shape of coarse and all-in aggregates — Flakiness index and shape index . 7
5.7 Shell content of coarse and all-in aggregates. 8
6 Physical requirements . 8
6.1 General . 8
6.2 Resistance to fragmentation . 8
6.3 Resistance to wear . 8
6.4 Particle density and water absorption . 8
6.4.1 Particle density . 8
6.4.2 Water absorption . . 8
6.5 Bulk density . 8
6.6 Resistance to polishing for surface courses . 8
6.7 Resistance to surface abrasion . 9
6.8 Resistance to abrasion from studded tyres to be used for surface courses . 9
7 Chemical requirements . 9
7.1 General . 9
7.2 Petrographic description. 9
7.3 Sulfur containing compounds . 9
7.3.1 Acid-soluble sulfate . 9
7.3.2 Total sulfur . 9
7.4 Chlorides .10
7.5 Constituents which alter the rate of setting and hardening of concrete .10
8 Durability .11
8.1 General .11
8.2 Soundness of coarse aggregates .11
8.3 Freeze-thaw resistance .11
8.3.1 Water absorption as a screening test for freeze-thaw resistance .11
8.3.2 Resistance to freezing and thawing .12
8.3.3 Resistance to freezing and thawing in the presence of salt
(extreme conditions) . .12
8.4 Volume stability — Drying shrinkage .13
8.5 Alkali-silica reactivity .13
9 Evaluation of conformity .13
10 Designation .14
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ISO 19595:2017(E)

10.1 Designation and description .14
10.2 Additional information for the description of an aggregate .14
11 Marking and labelling .14
Annex A (informative) Guidance on the description of coarseness/fineness of fine aggregates .15
Annex B (informative) Guidance on the effects of some chemical constituents of aggregates
on the durability of concrete in which they are incorporated .16
Bibliography .18
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ISO 19595:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre-
stressed concrete, Subcommittee SC 3, Concrete production and execution of concrete structures.
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INTERNATIONAL STANDARD ISO 19595:2017(E)
Natural aggregates for concrete
1 Scope
This document specifies the properties and requirements of aggregates obtained by processing
natural materials and mixtures of these aggregates for use in concrete. It is applicable to aggregates
3 3
with an oven-dried particle density greater than 2,00 Mg/m (2 000 kg/m ) in accordance with
ISO 22965 (all parts).
This document incorporates a general requirement that natural aggregates are not intended to release
any harmful substances in excess of the maximum permitted levels specified for the material or
permitted in the national regulations of the place in use.
National provisions, preferably given in a national annex or a project specification, can specify
additional or deviating requirements.
NOTE Requirements for the end use of aggregates in concrete are specified in ISO 22965 (all parts).
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.
ISO 6274, Concrete — Sieve analysis of aggregates
ISO 6782, Aggregates for concrete — Determination of bulk density
ISO 6783, Coarse aggregates for concrete — Determination of particle density and water absorption —
Hydrostatic balance method
ISO 7033, Fine and coarse aggregates for concrete — Determination of the particle mass-per-volume and
water absorption — Pycnometer method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
aggregate
granular material of natural, manufactured or recycled origin used in construction
3.2
natural aggregate
aggregate from mineral sources which has been subjected to nothing more than mechanical processing,
such as crushing, washing and sieving
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ISO 19595:2017(E)

3.3
aggregate size
designation of aggregate in terms of lower (d) and upper (D) sieve sizes expressed as d/D
Note 1 to entry: This designation accepts the presence of some particles which are retained on the upper sieve
(oversize) and some which pass the lower sieve (undersize).
Note 2 to entry: Other designations may be used where specified in a national standard.
3.4
grading
particle size distribution expressed as the percentages by mass passing a specified set of sieves
3.5
fines
particle size fraction of an aggregate that passes the 0,063 mm sieve
Note 1 to entry: The 0,075 mm sieve may be used where specified in a national standard.
3.6
coarse aggregate
designation given to the larger aggregate sizes with D greater than 4 mm and d greater than or
equal to 1 mm
Note 1 to entry: Aggregates that do not fit the definitions for fine or coarse (1 mm to 3 mm or 2 mm to 4 mm) are
treated as coarse aggregate.
Note 2 to entry: Coarse aggregate may be separated by other sizes where specified in a national standard.
3.7
fine aggregate
designation given to the smaller aggregate sizes with D less than or equal to 4 mm and d = 0
Note 1 to entry: Fine aggregate can be produced from natural disintegration of rock or gravel and/or by the
crushing of rock or gravel or processing of manufactured aggregates.
Note 2 to entry: Fine aggregate may be separated by other sizes where specified in a national standard.
3.8
all-in aggregate
aggregate consisting of a mixture of coarse and fine aggregates and fines with D greater than 4 mm
and d = 0
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.
3.9
filler aggregate
aggregate, most of which passes a 0,063 mm sieve, which can be added to construction materials to
provide certain properties
Note 1 to entry: Other sieve sizes, as the 0,075 mm sieve, may be used where specified in a national standard.
3.10
declared value
value declared and documented by a manufacturer, which is derived from measured values under
specified conditions and rules, for identification of performance requirements
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ISO 19595:2017(E)

4 Symbols and abbreviated terms
Symbol                 Description
AAV resistance to surface abrasion — aggregate abrasion value
AN resistance to abrasion from studded tyres — Nordic abrasion value
AS acid soluble sulfate content
F resistance to freezing and thawing — percentage loss of mass
f fines content
F resistance to freezing and thawing in the presence of salt (extreme conditions) — percentage
EC
loss of mass
FI particle shape of coarse and all-in aggregates — flakiness index
LA resistance to fragmentation — Los Angeles coefficient
MB fines quality — methylene method
MD resistance to wear — micro-Deval coefficient
MS magnesium sulfate value
PSV resistance to polishing of surface courses — polished stone value
S total sulfur content
SC shell content of coarse and all-in aggregates
SE fines quality — sand equivalent method
SI particle shape of coarse and all-in aggregates — shape index
SS sodium sulfate value
SZ resistance to fragmentation — impact value
WA water absorption value after 24 h
5 Geometrical requirements
5.1 General
The necessity for testing and declaring all properties specified in this clause shall be limited according
to the particular application at end use or origin of the aggregate. When required, the aggregates shall
be tested as specified in this clause to determine the relevant geometrical properties.
NOTE Guidance on selection of appropriate categories for specific applications can be found in national
provisions in the place of use of the aggregate.
5.2 Aggregate sizes
All aggregates shall be described in terms of aggregate sizes using the designations d/D and shall
conform to the grading requirements specified in 5.3, except for aggregates added as fillers, which shall
be specified as filler aggregate.
Aggregate sizes shall be specified using a pair of sieve sizes selected from one of the basic sets given in
Table 1. The basic sets are based on the R 20 series in ISO 565.
Other sieves specified in national standards may be used.
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ISO 19595:2017(E)

Table 1 — Sieve sizes for specifying aggregate sizes
Basic set 1 Basic set 2 Basic set 3 Basic set 4
mm mm mm mm
0 0 0 0
1 1 1 1,25 (1,2)
2 2 2 2,5
4 4 4 -
— 5,6 (5) — 5,0
— — 6,3 (6) —
8 8 8 —
— — 10 10
— 11,2 (11) — —
— — 12,5 (12) —
— — 14 —
16 16 16 —
— — 20 20
— 22,4 (22) — —
31,5 (32) 31,5 (32) 31,5 (32) 31,5 (30)
— — 40 40
— 45 — —
— 56 — 50
63 63 63 63 (60)
80 80 80 80
100 100 100 100
NOTE Rounded sizes shown in parentheses can be used as simplified descriptions of aggregate sizes.
5.3 Grading
5.3.1 General
The grading of the aggregate shall be determined in accordance with ISO 6274 and shall conform to the
requirements of 5.3.2 to 5.3.5 as appropriate to its aggregate size d/D.
Aggregates may comprise single sizes, all-in aggregates or combinations of two or more sizes.
Aggregates supplied as a mixture of different sizes or types should be uniformly blended. When
aggregates of significantly different density are blended, caution is necessary to avoid segregation.
Where the specification requires the use of sieves which are a fraction of the upper sieve size (e.g. D/2
or D/1,4) the sieve chosen shall be the next nearest from basic set plus set 1 or basic set plus set 2.
NOTE When a sieve size of the ISO 565 R 20 series is closer to the calculated d/2, D/1,4 or D/2 size, the
producer can choose to use this R 20 size.
5.3.2 Coarse aggregates
Coarse aggregates shall conform to the general requirements specified in Table 2, appropriate to their
size designation D/d.
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ISO 19595:2017(E)

Table 2 — Overall limits and tolerances for coarse aggregate
Coarse aggregate
Requirement
Property
Tolerance class 1 Tolerance Class 2 Tolerance Class 3
Particle distribution (grading):
—  percentage > d/2 Declared value ± 7,0 % Declared value ± 5,0 % Declared value ± 3,0 %
—  percentage > d Declared value ± 5,0 % Declared value ± 10,0 % Declared value ± 7,0 %
—  percentage > mid sieve, Declared value ± 20,0 % Declared value ± 15,0 % Declared value ± 12,0 %
   if D > 2d
—  percentage > D Declared value ± 15,0 % Declared value ± 10,0 % Declared value ± 7,0 %
—  percentage < 2D 100 % 100 % 100 %
Fines Declared value ± 3,0 % Declared value ± 2,0 % Declared value ± 1,0 %
Particle density Declared value Declared value Declared value
3 3 3
± 0,09 Mg/m ± 0,07 Mg/m ± 0,05 Mg/m
Water absorption Declared value ± 0,5 % Declared value ± 0,3 % Declared value ± 0,2 %
Particle shape Declared value ± 9 Declared value ± 7 Declared value ± 5
(flakiness index)
5.3.3 Fine aggregates
Fine aggregates shall conform to the general requirements of Table 3, appropriate to their upper
sieve size D.
National standards specifying other sieve sizes may be used where available.
NOTE Guidance on the description of coarseness/fineness of fine aggregates is given in Annex A.
Table 3 — Overall limits and tolerances for fine aggregate
Fine aggregate
Requirement
Property
Tolerance class 1 Tolerance Class 2 Tolerance Class 3
Particle distribution (grad-
ing): Declared value ± 5,0 % Declared value ± 3,0 % Declared value ± 2,0 %
—  percentage > 0,125 mm Declared value ± 8,0 % Declared value ± 5,0 % Declared value ± 3,0 %
—  percentage > 0,5 mm Declared value ± 15,0 % Declared value ± 10,0 % Declared value ± 7,0 %
—  percentage > 2 mm Declared value ± 9,0 % Declared value ± 7,0 % Declared value ± 6,0 %
—  percentage > D
Fines Declared value ± 5,0 % Declared value ± 3,0 % Declared value ± 2,0 %
Particle density Declared value Declared value Declared value
3 3 3
± 0,05 Mg/m ± 0,03 Mg/m ± 0,02 Mg/m
Water absorption Declared value ± 0,5 % Declared value ± 0,3 % Declared value ± 0,2 %
5.3.4 All-in aggregates
All-in aggregates shall conform to the general requirements of Table 4, appropriate to their upper
sieve size D.
National Standards specifying other sieve sizes may be used where available.
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ISO 19595:2017(E)

Table 4 — Tolerances on declared typical grading for all-in aggregate
All-in aggregate
Requirement
Property
Tolerance class 1 Tolerance Class 2 Tolerance Class 3
Particle distribution (grading):
—  percentage > 0,063 mm Declared value ± 7,0 % Declared value ± 5,0 % Declared value ± 3,0 %
—  percentage > 0,250 mm Declared value ± 25,0 % Declared value ± 25,0 % Declared value ± 20,0 %
—  percentage > D/2 Declared value ± 25,0 % Declared value ± 20,0 % Declared value ± 10,0 %
—  percentage > D Declared value ± 7,5 % Declared value ± 5,0 % Declared value ± 5,0 %
—  percentage < 2D 100 % 100 % 100 %
Fines Declared value ± 3,0 % Declared value ± 2,0 % Declared value ± 1,0 %
Particle density Declared value Declared value Declared value
3 3 3
± 0,09 Mg/m ± 0,07 Mg/m ± 0,05 Mg/m
Water absorption Declared value ± 0,5 % Declared value ± 0,3 % Declared value ± 0,2 %
Particle shape (flakiness index) Declared value ± 9 Declared value ± 7 Declared value ± 5
5.3.5 Special use aggregates and declared grading categories
When special aggregates gradings are required for a particular end use, or to define a specific source,
special grading envelopes shall be defined using the appropriate sieves from Table 1. The general
principles of this clause shall be applied using appropriate requirements at 2D, 1,4D, D, d, d/2. The
aggregate shall conform to the grading requirements specified.
NOTE This recognizes that size designations and grading categories are essentially categories of convenience
and different sizes and grading categories can be used by agreement between supplier and purchaser.
5.3.6 Grading for filler aggregate
The grading shall conform to the values specified in Table 5.
National Standards specifying other sieve sizes may be used where available.
Table 5 — Grading requirements for filler aggregate
Percentage passing by mass
Sieve size
Overall range for Producer’s maximum
mm
a
individual results declared range
2 100
0,125 85 to 100 10
0,063 70 to 100 10
a
Declared grading range on the basis of the last 20 values. 90 % of the results shall be within this range,
but all the results shall be within the overall grading range.
5.3.7 Natural graded 0/8 mm aggregates
Natural graded 0/8 mm aggregates shall conform to the general requirements specified in Table 6.
National Standards specifying other sieve sizes may be used where available.
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ISO 19595:2017(E)

Table 6 — Grading requirements for 0/8 mm natural graded aggregates
Natural graded aggregate (d = 0 mm and D < 8 mm)
Requirement
Property
Tolerance class 1 Tolerance Class 2 Tolerance Class 3
Particle distribution
(grading):
—  percentage > 0,125 mm Declared value ± 50 % Declared value ± 3,0 % Declared value ± 2,0 %
—  percentage > 0,250 mm Declared value ± 8,0 % Declared value ± 5,0 % Declared value ± 3,0 %
—  percentage > 2 mm Declared value ± 15,0 % Declared value ± 10,0 % Declared value ± 7,0 %
—  percentage > D Declared value ± 9 % Declared value ± 7,0 % Declared value ± 6,0 %
Fines Declared value ± 5,0 % Declared value ± 3,0 % Declared value ± 2,0 %
Particle density Declared value Declared value Declared value
3 3 3
± 0,05 Mg/m ± 0,03 Mg/m ± 0,02 Mg/m
Water absorption Declared value ± 0,5 % Declared value ± 0,3 % Declared value ± 0,2 %
5.4 Fines content
When required, the fines content shall be determined and the results declared using the designation
f .
Declared
5.5 Fines quality
When required, the fines quality shall be determined in accordance with EN 933-8 or EN 933-9 and
evaluated and declared as follows.
When the fines content in the fine aggregate is not greater than 3 %, or any other value according to the
provisions valid in the place of use of the aggregate, no further testing is required.
If the fines content is greater than 3 %, the fines of fine aggregate shall be considered non-harmful
(e.g. swelling of clay) when one of the two following conditions applies:
a) The sand equivalent value (SE), when tested in accordance with EN 933-8, and declared value
SE is higher than a specified limit;
Declared
b) The methylene blue value (MB) on the 0/2 mm fraction, when tested in accordance with EN 933-9,
and declared value MB is lower than a specified limit.
Declared
The compliance requirements for the sand equivalent test and the methylene blue test should normally
be expressed with a probability of 90 %.
NOTE If the fines content is greater than 3 % by mass and there is documented evidence of satisfactory use,
further testing might not be necessary.
5.6 Particle shape of coarse and all-in aggregates — Flakiness index and shape index
When required, the shape shall be determined in accordance with EN 933-3 in terms of the flakiness
index, and the results declared using the designation FI .
Declared
The flakiness index shall be the reference test for the determination of the shape.
For all-in aggregates the flakiness index shall be measured on the fraction 4/D.
When required, the shape index shall be determined in accordance with EN 933-4 and the results
declared using the designation SI .
Declared
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