Results
Two reactive samples, “RG_WN47LEB024_003coal” and “RG_WEST49LAU_009” were selected to use for the inhibited product test as described in Report GC17-05-22. Sample “5071C028” was also tested at elevated temperature because it contained >10% reactive sulphide which was inhibited by the coal that was also in the sample. These sample were used to test the 3 blends as described in Table 1. An additional control test was performed using ammonium nitrate in place of inhibited product.
Table 1 - Blends Tested as per AEISG Code of Practice for Testing Inhibited Products
Gassers was also added to each sample before adding the reactive sample and the weathering agent. The samples were tested over a period of 28 days and no significant temperature Isotherms were recorded (refer to Table 1, Figure 1, Figure 2 and Figure 3). The AEISG Code of Practive classifies >2°C isotherm as significant.
Table 2 - Results for Testing using AEISG Code of Practice for Inhibited Product Testing
Figure 1 -AEISG Temperature graph of all samples over 5 hours showing control sample reacting (expected)
Figure 2- AEISG Temperature graph of all samples over 3 days showing control sample reacting (expected)
Figure 3 -AEISG Temperature graph of all samples for 3 to 28 days hours showing no reactions
Conclusion:
Several inhibited samples exhibited <2°C isotherms on heating due to the elevated temperature; However, there were no reactions for the rest of the duration of the test.
Less than 2°C isotherm is considered as not reactive for testing as per the AEISG Code of Practice.
Bulk explosive products S371, S330 and S364 inhibited reactions with samples “RG_WN47LEB024_003”, “RG_WEST49LAU_009” and 5071CO28 when tested as per the AEISG Code of Practice for testing of inhibited products at 90°C.
Assessed By:
Dr G. Cavanough
Date:
29th August 2022