ISO 1014:2021

INTERNATIONAL ISO
STANDARD 1014
Third edition
2021-11
Coke — Determination of true relative
density, apparent relative density and
porosity
Coke — Détermination de la densité relative vraie, de la densité
relative apparente et de la porosité
Reference number
© ISO 2021
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ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 True relative density . 1
4.1 Principle . 1
4.2 Apparatus . 1
4.3 Preparation of sample . 2
4.4 Procedure . 3
4.5 Expression of results . . 3
4.5.1 Calculations . . 3
4.5.2 Precision . 4
5 Apparent relative density . 4
5.1 General . 4
5.2 Principle . 4
5.3 Apparatus . 4
5.4 Sample . 6
5.5 Procedure . 7
5.5.1 Procedure using an elliptical tank (5.3.2) . 7
5.5.2 Procedure using a rectangular cross-sectioned container with a spout
(5.3.2) . 7
5.6 Expression of results . . 7
5.6.1 Calculations . . 7
5.6.2 Precision . 8
6 Porosity . 8
6.1 Principle . 8
6.2 Expression of results . 8
7 Test report . 9
Bibliography .10
iii
Foreword
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 3,
Coke.
This third edition cancels and replaces the second edition (ISO 1014:1985), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 1014:1985/Cor 1:1994.
The main changes compared to the previous edition are as follows:
— the normative references (see Clause 2) have been updated;
— the mandatory Terms and definitions clause (Clause 3) has been added and subsequent clauses have
been renumbered;
— general and technical revision.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 1014:2021(E)
Coke — Determination of true relative density, apparent
relative density and porosity
1 Scope
This document specifies methods for
a) determining the true relative density of coke, crushed to <212 µm, in relation to water;
NOTE “True relative density” varies according to the displacement liquid used.
b) determining the apparent relative density of coke, i.e. the ratio of the mass of a volume of dry coke
to the mass of an equal volume of water;
c) calculating the porosity of the coke.
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 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal
plate
ISO 13909-6, Hard coal and coke — Mechanical sampling — Part 6: Coke — Preparation of test samples
ISO 18283, Hard Coal and Coke — Manual sampling
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 True relative density
4.1 Principle
The mass of water displaced by a known mass of dry coke, ground to pass a sieve of nominal size
of openings 212 µm, is determined using a pyknometer. Air is displaced by boiling during the
determination. Air-free distilled water is specified. Thermostatic control of the temperature is essential
since a difference of 1 °C can cause an error of about 0,012 in the result.
4.2 Apparatus
4.2.1 Pyknometer, 50 ml capacity, Figure 1.
4.2.2 Water bath, with stirrer, thermostatically controlled to maintain a desired temperature 0 °C to
within ±1 °C.
4.2.3 Two wash bottles, each containing about 50 ml of air free distilled water. One wash bottle is
kept hot (80 °C to 90 °C) and the other is left in the water bath (4.2.2).
4.2.4 Reflux air condenser: a glass tube about 1 m long, of the same external diameter as the neck of
the pyknometer (4.2.1) with a short length of rubber tubing for attaching it to the latter.
4.2.5 Glycerol bath: a suitable vessel in which sufficient glycerol can be heated for the lower two-
thirds of the pyknometer (4.2.1) to be immersed.
4.2.6 Balance, accurate to 0,1 mg.
Key
1 marked line
Figure 1 — Example of pyknometer
4.3 Preparation of sample
The coke used for the determination is the analysis sample, ground to pass a sieve of nominal size of
openings 212 µm (see ISO 13909-6, ISO 18283 and ISO 3310-2). Before commencing the determination,
mix the sample thoroughly for at least 1 min,
...