GB/T 540-2008Test methods for oil-resisting compressed asbestos fibre jointing (English PDF)

3.1 Summary of Method

The sample was dried at 800 °C burn 60min, wherein the organic and inorganic crystal water evaporation, measure the ignition Save

The amount of indirect inspect its heat resistance.

3.2 Test equipment and materials

a) balance. a sense of not more than 0.001g;

b) electric oven. the temperature can be controlled at 102 °C ± 2 °C;

c) high temperature furnace. temperature-controlled at 800 °C ± 20 °C;

d) dryer. packages containing anhydrous calcium chloride;

e) Crucible. at least three, each containing a volume of not less than 10cm3.

3.3 Test procedure

3.3.1

Weigh 3g ~ 5g sample in triplicate.

3.3.2

The samples were placed in three has been burned to constant weight of the crucible, at a temperature of 102 °C ± 2 °C electric drying oven to

Constant weight (apart 30min absolute error is less than twice the weighing 0.001g).

3.3.3

Remove the crucible containing the sample was cooled to room temperature in a desiccator, weigh the quality of the crucible and the sample after drying together, to accurately

0.001g.

3.3.4

After weighing the crucible containing the sample was placed in a temperature of 800 °C ± 20 °C high temperature furnace, the door ajar, burning 60min.

3.3.5

Remove the crucible containing the sample after burning, cooled to room temperature in a desiccator, weigh the quality of the crucible and the sample after burning together, to accurately

0.001g.

3.4 Calculation Results

Loss on ignition according to formula (1).

Sh = m1 1- 2 m1 m1 m1 × 1-

100 (1) […]