Building materials have come a long way since the early days of human civilization. From mud and straw to concrete and steel, the materials we use to construct buildings have evolved to meet the demands of modern architecture. However, the quest for the strongest building material in the world continues to this day. In this article, we will explore the different materials that have been tested and evaluated for their strength, durability, and other properties.

Body:

1. Concrete: Concrete is one of the most widely used building materials in the world. It is a mixture of cement, water, and aggregates such as sand and gravel. While concrete is strong and durable, it is not the strongest building material in the world. Its compressive strength ranges from 20 to 40 MPa, which is relatively low compared to other materials.
2. Steel: Steel is another popular building material that is known for its strength and durability. It is widely used in the construction of high-rise buildings, bridges, and other structures. Steel has a high tensile strength, which means it can withstand a lot of stress without breaking. However, steel is not the strongest building material in the world either.
3. Carbon fiber: Carbon fiber is a relatively new material that has gained popularity in recent years. It is made of thin, strong fibers that are woven together to create a lightweight, yet incredibly strong material. Carbon fiber has a tensile strength of up to 6,000 MPa, which is much higher than steel. However, it is also expensive and difficult to work with, which limits its use in construction.
4. Graphene: Graphene is a two-dimensional material that is made of a single layer of carbon atoms. It is incredibly strong, lightweight, and flexible. Graphene has a tensile strength of up to 130 GPa, which is much higher than any other material. However, it is still in the experimental stage and has not yet been widely used in construction.

Conclusion:
In conclusion, the quest for the strongest building material in the world continues. While there are several materials that are incredibly strong and durable, none of them are perfect. Each material has its own strengths and weaknesses, and the choice of material depends on the specific needs of the project. As technology continues to advance, we may discover new materials that are even stronger and more durable than those we have today.