Glasindustri och keramisk industri

Ämnesområden: Eldfasta material
Kommittébeteckning: SIS/TK 998 (Standardiseringsarbete utan svenskt deltagande)
Källa: CEN
Svarsdatum: den 2 mar 2024
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his International Standard describes the procedure for the preparation of test panels from refractory materials by gunning through pneumatic nozzle mixing type guns at ambient temperatures. The test pieces are for the determination of properties on as-gunned products prepared under either “standard conditions” (as required for quality assurance or product development) or “site conditions”. In the case of “site conditions”, the purpose of the testing is to establish the properties pertaining to a given installation or a given set of installation conditions. In this case, the panel is obtained during the on-site installation. Such parameters as ambient temperature, gunning elevation, air pressure and curing conditions (temperature, orientation of the panel) applying during the preparation of the panel are as near as possible to the same parameters pertaining to the site installation. This International Standard does not apply to plastic gunning mixes and might not apply to those mixes that contain aggregates that are susceptible to hydration. It also does not apply to shotcrete type mixes. (These are dealt with in ISO 18886, “Refractory test-piece preparation – Gunning refractory panels by wet gunning techniques.”).

Ämnesområden: Konstruktionskeramer
Kommittébeteckning: SIS/TK 998 (Standardiseringsarbete utan svenskt deltagande)
Källa: CEN
Svarsdatum: den 2 apr 2024
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This document describes procedures for determination of the tensile behaviour of ceramic matrix composite materials with continuous fibre reinforcement at elevated temperature in air, vacuum and inert gas atmospheres. This method applies to all ceramic matrix composites with a continuous fibre reinforcement, uni-directional (1D), bidirectional (2D) and multi-directional (xD, with x > 2), tested along one principal axis of reinforcement or off axis conditions for 2D and xD materials. This method also applies to carbon-fibre-reinforced carbon matrix composites (also known as carbon/carbon or C/C). NOTE In most cases, ceramic matrix composites to be used at high temperature in air are coated with an anti-oxidation coating.

Ämnesområden: Konstruktionskeramer
Kommittébeteckning: SIS/TK 998 (Standardiseringsarbete utan svenskt deltagande)
Källa: CEN
Svarsdatum: den 2 apr 2024
Se merSe mindre
 

This document describes procedures for determination of the compressive behaviour of ceramic matrix composite materials with continuous fibre reinforcement at elevated temperature in air, vacuum and inert gas atmospheres. This method applies to all ceramic matrix composites with a continuous fibre reinforcement, uni-directional (1D), bidirectional (2D) and multi-directional (xD, with x > 2), tested along one principal axis of reinforcement or off axis conditions for 2D and xD materials. This method also applies to carbon-fibre-reinforced carbon matrix composites (also known as carbon/carbon or C/C). Two cases of testing are distinguished: compression between platens and compression using grips.

Ämnesområden: Eldfasta material
Kommittébeteckning: SIS/TK 998 (Standardiseringsarbete utan svenskt deltagande)
Källa: CEN
Svarsdatum: den 5 apr 2024
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As per ISO document i.e. This document specifies three methods for the determination of the bulk density of granular refractory materials (grain density) having a grain size larger than 2 mm: — Method 1: mercury method with vacuum; — Method 2: arrested water absorption method; — Method 3: vacuum method with spin dryer option according to ISO 5017. Method 1 is intended as the reference method. NOTE Depending on the nature of the material tested, the three methods can give different results. Any statement of the value of a bulk density can therefore be accompanied by an indication of the method used or to be used in case of dispute. The same method can be used for the determination of the volume of the sample, for selecting and preparing the sample, for calculating the bulk density and for presenting the test report.