Samples Tested
Results
Table 1 - AEISG Test Results:
Table 2 - QMR Test Results:
Figure 1– AEISG test result not reactive for isotherm of sample C13139-ER03:
Figure 2:
QMR test measurement for C13139-ER03 showing reaction when the sample becomes acidic - this occurs due to weathering and is replicated in accelerated time by QMR Test – see temperate rise from 43°C to 83°C when 10 grams of sample C13139_ER03 added to a nitrate saturated solution.
Each sample was assessed for reactivity risk based on pH, carbonate content, reactive sulphide content and coal content using the QMR Reactive Ground Test. Sample C13129_ER03 is the only sample with a high level of reactive sulphide. Should this sample become weathered and acidic it will be reactive. Blast holes should not be left open for a long period of time and sleep time should be minimised so as to prevent this ground from being weathered. Weathering will cause the oxidation of the pyrite resulting in acidic conditions caused a reaction and may wash away the coal that is currently acting as an inhibiter also causing a reaction
Conclusion:
All samples were found to be not reactive when tested as per the AEISG Code of Practice. The QMR test identified Samples C13139_ER03 will become reactive if allowed to weather.
Assessed By:
Dr G. Cavanough
Date:
28th September 2024
References:
Test data files: rga22.xlxs, templog22.xlxs, data23-second batch and tablet2.xlxs