ISO 16835-2014 pdf free download

ISO 16835-2014 pdf free download.Refractory products — Determination of thermal expansion
Produits réfractaires — Dosage de Ia dilatation thermique.
b) Supporting rod (9): The supporting rod (9) shall be a cylindrical refractory material of at least 45 mm outside diameter. In the apparatus in Figure 1 and Figure 2. the hole of concentric circle for passing through the tubes for detecting the upper and lower positions shall be provided.
c) Disk-type spacers (2) and (6): The disk-type spacers (2) and (6) shall be the refractory material inserted for preventing the test piece from adhering to (1) and (9) by fusion due to chemical reaction, for example a disk of at least 50 mm outside diameter and 5 mm to 10 mm thickness of the aluminosilicate refractory such as high temperature sintered mullite or alumina, or the basic refractory such as magnesia or spinel. The hole of concentric circle passing through (7) shall be provided at (6) in the apparatus shown in FigurLi and Figure2, and at (2) in the apparatus shown in Figurea. Both ends of(1) and (9) shall be processed so as to be flat and in parallel position, and the spacers (2) and (6) contacted with it shall be processed to make them vertical to the central axis.
When the test piece ready to react with other refractory material, such as silica especially, is measured, the foil of platinum or platinum rhodium alloy (9) of approximately 0,2 mm in thickness may be placed between the test piece and both spacers as shown in Figurel.
d) Tube for detecting the lower position of test piece (8): The tube for detecting the lower position of test piece (8) shall be the alumina tube of which the tip penetrates the supporting rod (9) in apparatus in Figure 1 and Figure 2 or the pressure rod (1) in the apparatus in Figure 3 and is contacted with the lower disk-type spacer adhering closely to the lower surface of the test piece, and shall be capable of moving freely so as not to make contact with the supporting rod.
e) Tube for detecting the upper position of test piece (7): The tube detecting the upper position of test piece (7) shall be the alumina tube of which the tip penetrates the supporting rod (9), the lower disk type spacer (6), and test piece (5) in the apparatus In Figure 1 and Figure 2 and is contacted with the upper disk-type spacer adhering closely to the upper surface of test piece, and shall be capable of moving freely so as not to be contacted with those. In the apparatus in Figure 3. the structures of these d) and e) are reversed.
f) Material and preparation of jigs: For the jigs, the material capable of enduring the load without deformation and reaction up to the final (highest) test temperature shall be selected.
The material from which the jigs are made should have a T1 value greater than or equal to the temperature at which the test material has a 7’s value. T1 and T are obtained according to Iso 1893:2007.
4.2.2 Heating furnace
The heating furnace shall be the tubular furnace of which the central axis conforms to the measurement system. It shall he capable of heating the test piece up to the final (highest) test temperature at the specified rate of rising temperature [see c) in 4A,11 in the atmosphere and of heating uniformly 12,5 mm of the upper and lower sides of test piece at 500 °C or higher within ± 20°C of the specified temperature. The uniform heating zone around the test piece shall be measured beforehand.ISO 16835-2014 pdf free download.