Rockology 101

Welcome to class! This is a place for students of all ages to learn about Rogers Group operations and products or just have a little fun!

Rockology 101: Learning
Bet You Didn't Know
How Aggregates Are Made
How Aggregates Are Transported
How Aggregates Impact Your Life
Why Quarries Are Good Neighbors
The Mining Process
The Open Road
Sand, It's Not Just For Beaches
Farmers Like a Twist of Aglime
Modern Life and The Rock
Properties of Rocks
Rockology 101: Fun Facts
Rockology 101: Activities

How Aggregates Impact Your Life

Housing Build A House With Crushed Stone

Most people do not realize just how much sand, gravel or crushed stone goes into the construction of an average home.

15,000 tons of aggregates are required for the construction of an average size school or hospital. It is estimated that 85,000 tons of aggregates are necessary to construct one mile of a four-lane interstate highway. In the United States, the construction of a new home uses an average of 120 tons of aggregates. Sidewalks, driveways, roofs, foundations, floors, fences, and walls all contain aggregates in one form or another.

Aggregates will always play an important role in building America's houses.

Commercial Structures Build a City with Crushed Stone

The skyline of any city is an impressive site to visitors and residents. Concrete is commonly used in the construction of all large buildings. Crushed stone, sand and gravel are used to make concrete. Buildings like the Denver National Airport located in Denver, Colorado required 5 million tons of crushed stone, sand and gravel. The Sears tower in Chicago, Illinois has enough concrete, crushed stone, sand and gravel in it to pave 8 one-mile lanes of interstate highway.


Modern road paving brought us asphalt pavements. The basic paving materials, concrete and asphalt, are composed primarily of crushed stone, sand and gravel. Sub-bases, upon which roads, pavements, many landscaping and drainage installations are constructed, require thousands of tons of aggregates.

Special Uses

Aggregates play vital roles in providing food, water, electricity, recreation, and other basic of our modern society. The dams that store our water supplies and create our fishing and boating opportunities are constructed with concrete, crushed stone and gravel. Our sewer and waste water treatment facilities could not be built without available aggregates and concrete. Concrete-lined canals are built to conserve agricultural water to ensure productive farming. Crushed stone, ground into a powder, is used as an important mineral supplement in our agriculture industry. Large material, called "rip rap", is used to prevent erosion along rivers and shorelines.

Dimension Stone

Used for external or interior parts of buildings, foundations, curbing, paving, flagging, bridges or other architectural or engineering purposes, dimension stone is naturally occurring rock material that has been cut, shaped or selected for use in blocks, slaps, sheets or other specified construction units. The term also applies to quarry blocks from which pieces of fixed dimension may be cut. Marble, granite, limestone, and sandstone provide the bulk of dimension stone; however, slate, diorite, basalt and diabase may also be sources. Many public and governmental buildings and areas rely on dimension stone to supply both strength and community aesthetics.

Source: The National Energy Foundation