Stones

What do you see in the puzzle?

An structure made of stones that seems to be the entrance to a kind of castle or any other ancient construction.

What is the material used?

The material used is stone

How many types of uses are given to the material?

There is a lot of uses for this material, it usually is used on facades because of the beauty that this materials could bring. Also is a very strong material, that is why formerly this material was used for the construction of entire buildings like houses, bridges, and others. Nowadays the stone has been sistituted by other materials on the contruction of estructural parts.

What are stones?

Stones are solids made of compressed minerals and mineraloids.

How many types of stone do you know?

I know about three types of stones, sedimentary stones, igneus stones and metamorphic stones.

What characteristics do stones have?

The characteristics of a particular stone depends of its type.

Igneus stones: they are made of volcanic lava and ashes, like granite. There is at least 700 subtypes of igneus stones discovered and their characteristics vary between them.

Sedimentary stones: they are made of sedimentations of materials at the earth surface, such like animal bodies, dead plants and others plus other minerals on the earth. Sedimentary rocks are also important sources of natural resources like fuel oils.

Metamorphic stones: they are the transformation of another rock, could be sedimentary or igneus. This transformation is produced by all the natural changes that pur planet face everyday, but is needed a long time for the creation of rocks.

Why are stones used in constructions?

They are used in construction because of their useful characteristics. Is a strong and tough material perfect for the facades of any building or for the construction of an structural element; is a good-looking material that is why stones are very usefull as a decoration element, and the variety of stones with differents properties and characteristics makes that there always is going to be a stone perfect for any use.

Parragraph

Stone, as construction material, has advantages and disadvantages. This material show sign of durability, adaptability to sculptural treatments and is used naturally; but stones also **are difficult to quarry, transport and cut, making that using this material on a construction required a lot of work, in addition this material is very expensive, weak in tension** and unstable with loads at angle. There are a lot of types of stones that can be used for many purposes, for example: **In conclusion, stone is a material with advantages and disadvantages very used in ancient world and nowadays. Stones are one option at the moment of construction
 * Rubble: is the cheapest one and it can be used in walkways and ornamental walls.
 * Ashlar Masonry: Used in monumental architecture. **Usually cut in blocks, and because of its weight it doesn’t depend of strong bonding.**

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