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Does the type of sand affect the durability of bricks Featured science projectScience project video

Conclusion

The hypothesis that coarse sand particles  make more durable  bricks than those made of  fine sand particles is proven to be true.

Bricks have been used in the construction of homes for hundreds of years. Their high thermal properties have also made them suitable for use to line the walls of furnaces  used in glass manufacturing and metallurgy.
 

Also consider

The science fair project can be repeated by varying the ratios of the materials used to make the bricks or by varying the materials used to make the bricks.

You might also want to consider testing how much compression or weight the bricks are able to bear.
 

References

http://en.wikipedia.org/wiki/Brick

Brick - http://www.enotes.com/how-products-encyclopedia/brick

Composition of bricks - http://chestofbooks.com/architecture/Construction-Superintendence/215-Composition-of-Bricks.html
 

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Complexity level:
7
Project cost ($):
90
Time required:
5 days for preparation, 1 day for observation
Material availability:
Access to an industrial oven/dry box or kiln is required, in order to achieve temperatures required for baking the bricks.
Safety concerns:

Basic safety requirements