ISO 12985-2:2000
(Main)Carbonaceous materials used in the production of aluminium — Baked anodes and cathode blocks — Part 2: Determination of apparent density and of open porosity using a hydrostatic method
Carbonaceous materials used in the production of aluminium — Baked anodes and cathode blocks — Part 2: Determination of apparent density and of open porosity using a hydrostatic method
Produits carbonés utilisés pour la production de l'aluminium — Anodes cuites et blocs cathodiques — Partie 2: Détermination de la masse volumique apparente et de la porosité ouverte par une méthode hydrostatique
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 12985-2
First edition
2000-06-01
Carbonaceous materials used in the
production of aluminium — Baked anodes
and cathode blocks —
Part 2:
Determination of apparent density and of
open porosity using a hydrostatic method
Produits carbonés utilisés pour la production de l'aluminium — Anodes
cuites et blocs cathodiques —
Partie 2: Détermination de la masse volumique apparente et de la porosité
ouverte par une méthode hydrostatique
Reference number
ISO 12985-2:2000(E)
©
ISO 2000
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ISO 12985-2:2000(E)
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ISO 12985-2:2000(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 12985 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 12985-2 was prepared by Technical Committee ISO/TC 47, Chemistry, Subcommittee
SC 7, Aluminium oxide, cryolite, aluminium fluoride, sodium fluoride, carbonaceous products for the aluminium
industry.
ISO 12985 consists of the following parts, under the general title Carbonaceous materials used in the production of
aluminium — Baked anodes and cathode blocks:
� Part 1: Determination of apparent density using a dimensions method
� Part 2: Determination of apparent density and of open porosity using a hydrostatic method
© ISO 2000 – All rights reserved iii
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INTERNATIONAL STANDARD ISO 12985-2:2000(E)
Carbonaceous materials used in the production of aluminium —
Baked anodes and cathode blocks —
Part 2:
Determination of apparent density and of open porosity
using a hydrostatic method
1 Scope
This part of ISO 12985 specifies a hydrostatic method for the determination of the apparent density and the open
(to water) porosity of carbonaceous products used in the production of aluminium.
This hydrostatic method was developed principally to determine the open porosity but can also be used to measure
the apparent density. This part of ISO 12985 is especially applicable to samples of complex on irregular geometry
(due to drilling difficulties).
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 12985. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 12985 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 8007-1, Carbonaceous materials used in the production of aluminium — Sampling plans and sampling from
individual units — Part 1: Cathode blocks.
ISO 8007-2, Carbonaceous materials used in the production of aluminium — Sampling plans and sampling from
individual units — Part 2: Prebaked anodes.
3Principle
The apparent density of a material is defined as the ratio of its dry mass to its volume. The volume is determined by
the measurement of the Archimede's force (the mass of the displaced liquid) applied to the sample saturated with
water after boiling. The open porosity is simply measured by calculating the ratio of the mass (volume) of water,
which has penetrated into the sample after boiling, to the mass (volume) of the displaced water measured with the
hydrostatic balance.
4 Reagents
4.1 Distill
...
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