Objective: To ascertain the percentage of water absorption of bricks
Apparatus
A delicate balance which is capable of weighing within 0.1% of the weight of the sample and aired oven.
Specimen
Three numbers of whole bricks from specimen gathered for testing has to be undertaken.
Process
- Put out the sample for drying in a well- ventilated oven at an approximate temperature of 105 °C to 115°C until it acquires considerably constant mass.
- Leave the sample to room temperature and acquire its weight (
) sample too warm to touch should not be utilized for this resolve . - Submerge completely dried sample in clean water at an approximate temperature of 27+2°C for at least a day.
- Detach the specimen and wipe out any kind of traces of water with moist cloth and measure the weight of the sample after it has been detached from water (
).
Calculation
Water absorption, % by mass, after 24 hours immersion in cold water in given by the formula,
The average of result should be noted down
Result
Water absorption of the given bricks = ………….%