Does the type of sand affect the durability of bricks
The materials required for this science fair project are:
- 10 wooden frames ( length 200mm x Width 100mm x Height 65mm)
- 8 liters of clay
- 1 liter of fine sand
- 1 liter of coarse sand
- Tap water
- 2 empty pails
- 1 chair
- 1roll of measurement tape
- 1 large industrial oven or kiln. 1 black marker pen
- 1 bottle of grease
1. The independent variable in this science fair project is the type of sand used to make the brick – fine or coarse sand. The dependent variable is the number of times the bricks are dropped before they disintegrate . This is determined by counting the number of times the bricks are dropped from a stipulated height and observing the state of disintegration on the bricks after dropping them. The constants (control variables) are the weight of the brick, the volume of the brick, the mix ratio used to make the brick, the height from which the bricks are dropped and the temperature of the oven.
2. Label 5 wooden frames “fine sand”. Label the emaining 5 frames “coarse sand”. Coat the inner surface of the frames with grease to prevent the bricks from sticking onto the frames.
3. Mix 1 liter of fine sand with 4 liters of clay in an empty pail. Add water and mix until a a soft mixture is obtained. Pour the mixture into the 5 wooden frames labeled “fine sand”.
4. Repeat step 3 using the coarse sand. Use the same amount of water to prepare the mixture. Pour the mixture into the 5 wooden frames labeled “coarse sand”.
5. Leave the 10 wooden frames to dry for 2 days. Separate the bricks from the frames after that. Label the bricks “fine sand” or “coarse sand” respectively depending on the wooden frame from which they are being removed from. Place the bricks in the dry box oven for 24 hours at 900 °C. Remove the bricks from the oven after that and allow them to cool
6. Measure a height of 2 meters using a measuring tape. Dropthe bricks from a height of 2 meters. Do this while standing on a chair. The chair is placed beside a wall and using the measuring tape, a line is drawn on the wall to mark the height of 2 meters. The bricks are then dropped while standing on the chair and holding the brick at that height. Record the number of times the bricks are dropped before they disintegrate in the table provided below.
Basic safety requirements