BS ISO 20202:2004 pdf free.Carbon aceous materials used in the production of aluminium- Cold and tepid ramming pastes一Preparation of baked test pieces and determination of loss on baking.
BS ISO 20202 This International Standard describes a method of baking green test specimens made by compacting carbonaceous ramming pastes. It includes the baking procedure (heating rate and holding time) and the determination of the loss on baking (relative mass loss).Baked test specimens of ramming paste need to be prepared for the determination of properties after baking,for instance apparent density, crushing strength and porosity.2 Normative references The following referenced documents are indispensable for the application 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 4955, Heat-resisting steels and alloys ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results一Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method Iso 14422, Carbonaceous materials used in the production of aluminium一Cold-ramming pastes一Methods of sampling ISO 14427, Carbonaceous materials used in the production of aluminium 一Cold and tepid ramming pastes一Preparation of unbaked test specimens and determination of apparent density after compaction ASTM E 220, Standard Test Method for Calibration of Thermocouples by Comparison Techniques.Compacted test specimens of carbonaceous ramming paste are baked in a furnace by raising the temperature at a specified rate to 1 000 °C and holding the temperature at this value for 2 h. The mass of each test specimen is measured before and after baking and the loss on baking calculated.Determine the mass mo of each unbaked test specimen to the nearest 0,1 g.Insert the test specimens in the baking container (4.3). Surround the test specimens on all sides by at least 10 mm of packing material (4 .4). Insert the container, with its cover fitted, into the furnace (4.2). Heat the furnace in accordance with the heating programme given in Table 1.BS ISO 20202 pdf downlaod.