OK so I am sticking with . . . "What materials work best in a sandbag for preventing a flood?"
So far the aim is: to determine what materials work best in a sandbag for preventing a flood.
Hypothesis: If the density of the material used in the sandbag is increased there is a decrease in the amount of the water that escapes past the sandbags.
So far the aim is: to determine what materials work best in a sandbag for preventing a flood.
Hypothesis: If the density of the material used in the sandbag is increased there is a decrease in the amount of the water that escapes past the sandbags.
Equipment List and where they’re available:
1m² of hessian – available @ Spotlight
1kg Sand – available @ Flower Power
1kg Coarse Gravel – available @ Flower Power
1kg Wood Chips – available @ home
1kg Soil – available @ home
1 x Aluminium Foil – available @ Woolworths
1 x Labelled bucket – available @ home
1 x 1.25L milk carton – available @ home
1 x Stopwatch – available @ home
1 x Sewing Machine – available @ home
Water – available @ home
> Dependent/Independent/Controlled Variables described in detail in previous blog
> Risk Assessment mentioned in detail in previous blog
Method: 1 ⁄3 of an aluminium foil container was sawed off. Sandbags were made with the material hessian into 13.5cm x 7.0cm bags with a sewing machine. Then, 100g of sand was filled into a sandbag. 1cm was left at the top so that the flap could be folded down. This was done until there were 9 sandbags that contained the same material. This was repeated with the other three materials as well: coarse gravel; soil; and wood chips.
Three sandbags (with the same material in it) were placed side by side in the middle of the aluminium container. Another three sandbags (of the same material) were placed on top of those sandbags and the last three bags were stacked on top so that there were three levels of sandbags. A labelled bucket was placed beneath the aluminium container and a 1.25L milk carton was filled with water. The water was steadily poured at the closed end of the aluminium container and a stopwatch was pressed simultaneously. After 5mins the bucket was removed and the amount of water in it was measured and recorded in a results table. The experiment was repeated with the other three materials (coarse gravel, soil and wood chips) and tested 3-4 times each for accuracy.
[This method will be edited and “cleaned up” in the final report once I’ve completed the experiment. It’ll be likely that during the experiment something will go amiss or that I discovered a better solution to doing the experiment? :) ]
Method: 1 ⁄3 of an aluminium foil container was sawed off. Sandbags were made with the material hessian into 13.5cm x 7.0cm bags with a sewing machine. Then, 100g of sand was filled into a sandbag. 1cm was left at the top so that the flap could be folded down. This was done until there were 9 sandbags that contained the same material. This was repeated with the other three materials as well: coarse gravel; soil; and wood chips.
Three sandbags (with the same material in it) were placed side by side in the middle of the aluminium container. Another three sandbags (of the same material) were placed on top of those sandbags and the last three bags were stacked on top so that there were three levels of sandbags. A labelled bucket was placed beneath the aluminium container and a 1.25L milk carton was filled with water. The water was steadily poured at the closed end of the aluminium container and a stopwatch was pressed simultaneously. After 5mins the bucket was removed and the amount of water in it was measured and recorded in a results table. The experiment was repeated with the other three materials (coarse gravel, soil and wood chips) and tested 3-4 times each for accuracy.
[This method will be edited and “cleaned up” in the final report once I’ve completed the experiment. It’ll be likely that during the experiment something will go amiss or that I discovered a better solution to doing the experiment? :) ]
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