ISO/FDIS 22685

Refractory products -- Determination of compressive strength at elevated temperature

Produits réfractaires -- Détermination de la résistance à la compression à température élevée

General Information

• Status: Published
• ICS: 81.080 - Refractories
• Technical Committee: ISO/TC 33 - Refractories
• Drafting Committee: ISO/TC 33/WG 29 - Determination of compressive strength at elevated temperatures
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 15-Jun-2021
• Completion Date: 15-Jun-2021

Standards Content (sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 22685
ISO/TC 33
Refractory products — Determination
Secretariat: BSI
of compressive strength at elevated
Voting begins on:
2021­06­15 temperature
Voting terminates on:
Produits réfractaires — Détermination de la résistance à la
2021­08­10
compression à température élevée
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 22685:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 22685:2021(E)
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© ISO 2021

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ii © ISO 2021 – All rights reserved
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ISO/FDIS 22685:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Apparatus ..................................................................................................................................................................................................................... 2

5.1 Furnace .......................................................................................................................................................................................................... 2

5.2 Loading device......................................................................................................................................................................................... 2

5.2.1 General...................................................................................................................................................................................... 2

5.2.2 Loading column ................................................................................................................................................................ 2

5.2.3 Supporting column ........................................................................................................................................................ 2

5.2.4 Discs ............................................................................................................................................................................................ 2

5.3 Deformation measuring device ................................................................................................................................................ 2

5.4 Calipers .......................................................................................................................................................................................................... 3

5.5 Electrical oven ......................................................................................................................................................................................... 3

5.6 Set square .................................................................................................................................................................................................... 3

5.7 Feeler gauge ............................................................................................................................................................................................... 3

6 Test pieces ................................................................................................................................................................................................................... 3

6.1 Sampling ....................................................................................................................................................................................................... 3

6.2 Dimensions ................................................................................................................................................................................................. 3

6.3 Preparation ................................................................................................................................................................................................ 3

6.3.1 Shaped refractory products .................................................................................................................................... 3

6.3.2 Dense unshaped refractory products ............................................................................................................ 3

6.4 Dimension checking ........................................................................................................................................................................... 4

6.4.1 Plane of loading surfaces .......................................................................................................................................... 4

6.4.2 Parallelism of loading surfaces ............................................................................................................................ 4

6.4.3 Perpendicularity .............................................................................................................................................................. 4

6.5 Drying and treatments ..................................................................................................................................................................... 4

7 Procedures .................................................................................................................................................................................................................. 4

7.1 Dimension measurement ............................................................................................................................................................... 4

7.1.1 Diameter ................................................................................................................................................................................. 4

7.1.2 Height ........................................................................................................................................................................................ 4

7.2 Installation .................................................................................................................................................................................................. 5

7.3 Heating ........................................................................................................................................................................................................... 5

7.3.1 Test temperature ............................................................................................................................................................. 5

7.3.2 Heating rate .......................................................................................................................................................................... 6

7.3.3 Dwell time .............................................................................................................................................................................. 6

7.4 Loading .......................................................................................................................................................................................................... 6

7.4.1 Dense refractory products ....................................................................................................................................... 6

7.4.2 Insulating refractory products ............................................................................................................................. 6

8 Calculation of results ....................................................................................................................................................................................... 6

9 Precision and bias ............................................................................................................................................................................................... 6

9.1 Interlaboratory data ........................................................................................................................................................................... 6

9.2 Precision ....................................................................................................................................................................................................... 7

9.3 Bias .................................................................................................................................................................................................................... 7

10 Test report ................................................................................................................................................................................................................... 7

© ISO 2021 – All rights reserved iii
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ISO/FDIS 22685:2021(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

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organizations, governmental and non­governmental, 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).

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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 33, Refractories.

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 © ISO 2021 – All rights reserved
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 22685:2021(E)
Refractory products — Determination of compressive
strength at elevated temperature
1 Scope

This document specifies a test method for determining the compressive strength of refractory products

at elevated temperature.

This test method could also be used for materials development, quality control, characterization, design

and data generation purposes.

NOTE This document also could be used for determining the compressive strength of carbon containing

refractory products at elevated temperature in an airtight furnace with reducing atmosphere.

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 5022, Shaped refractory products — Sampling and acceptance testing

ISO 1927­2, Monolithic (unshaped) refractory products — Part 2: Sampling for testing

ISO 1927­5, Monolithic (unshaped) refractory products — Part 5: Prepar
...