ISO 16835:2014 pdf free

ISO 16835:2014 pdf free.Refractory products一Determination of thermal expansion
The apparatus shall be comprised of the following.
a) Fixed pressure rod (1): The fixed pressure rod (1) shall be a cylindrical refractory material of at least 45 mm outside diameter. In the apparatus in Figure 3, the hole of concentric circle for passing through the tubes for detecting the upper and lower positions shall be provided.
Care shall be taken so as not to contact with the hole of the upper lid of the heating furnace.
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 alumino-silicate 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 Figure 1 and Figure 2, and at (2) in the apparatus shown in Figure 3. 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 Figure 2.
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.ISO 16835 pdf download.