Crushed rock, also known as aggregate, is a versatile and cost-effective material commonly used in construction projects. The most popular composition of crushed rock is limestone, a sedimentary rock that is primarily composed of calcium carbonate.

Limestone is a popular choice for construction projects because of its durability and strength. It is also relatively inexpensive and easy to find, making it a cost-effective option for a wide range of construction projects. Additionally, limestone is able to withstand harsh weather conditions and is resistant to erosion, making it a great choice for outdoor projects such as road construction and land development.

Limestone can be used in a variety of ways in construction projects. It is often used as a base material for roads, parking lots, building pads, and other paved surfaces, as well as for drainage systems and retaining walls. It can also be used in the production of cement and as a filler in asphalt.

Another popular composition of crushed rock is granite, a type of igneous rock that is known for its durability and strength. Granite is often used in construction projects where high levels of durability and strength are required, such as in the construction of bridges, rail roads, and buildings.

In addition to limestone and granite, other types of crushed rock that are commonly used in construction projects include sandstone, basalt, and dolomite. Each of these types of rock has its own unique properties and characteristics, making them well-suited for different types of construction projects.

Overall, limestone is the most popular composition of crushed rock used in construction projects due to its durability, strength, availability, and cost-effectiveness. Other types of crushed rock, such as granite, sandstone, basalt, and dolomite, are also commonly used for specific types of construction projects.