It goes without saying that the construction trade has been in existence for thousands of years. From the Pyramids in Egypt, to the Coliseum and other structures in Rome, were all constructed using the strongest form of material known for that time, which was marble and granite, both of which come from the earth and must be cut and shaped to the builders specifications.
Another construction material of strength is concrete, whose use has been employed for over 200 years. The major drawback with this material is being prone to erosion over time. Concrete in itself is durable, but when re-enforced with iron, as when building roads and other projects that must support enormous weight, its strength is maximized. Also, concrete begins in a semi-liquid state that can be poured into forms to achieve most any shape.
The third example of strength in a construction material is steel. Most high-rise buildings are constructed using a steel frame that acts as the skeleton of the structure. Steel is fabricated by man, in that it is cast from molten metals, poured then dries to its hardened state. Of the three mentioned, steel is the choice for durability and can be recycled repeatedly.
Jul 11
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