Lets Rock

1
Lets Rock

• By Pam Rountree
• ECE 7540 7540

2
Bet You Didnt Know..

• Aggregates are the only mineral commodity
  produced in every state in the union. Every year
  more than two billion tons of this material are
  used in the United States.

3
Imagine life without . . .

• highways
• paint
• plastics
• medicines
• glass
• driveways
• concrete sidewalks
• bridges
• wallboard
• vinyl
• brick and stone buildings and homes
• concrete blocks
• roofing tiles
• asphalt shingles
• minerals for agriculture

.. all these things are made possible with
crushed stone products ..
4
AND . . .

• More than a million employees and their families
  rely on the countrys construction materials
  industries for their livelihoods. Many live and
  work in your community. Thousands of other folks
  rely on this resource and industry to make
  possible other things like schools, hospitals,
  and airports. Rogers Group employs 1,700 people
  and does business in 5 states and numerous
  communities.

5
Remember that

• Every small town,Every big city,and Every road
  and building in themare built with stone!

6
Where do you see stone in your town?
7
Where do we get this rock from?

• Open pit mining and quarrying is the most common.
• Some are mined underground too.

8
How Aggregates Are Made

• First - Geologists locate large sources of
  aggregate in the earth called reserves.
  Geologists are scientists who specialize in the
  study of earth sciences and rocks and minerals.

9
Next..

• dozers remove the top layer of grass, dirt and
  rock called overburden. Near the rocks outer
  edge, long holes are drilled downward and loaded
  with explosive. The rock is blasted to loosen and
  break the rock into pieces. Workers follow
  special safety precautions, rules and regulations
  when blasting occurs in a quarry.

10
After that

• A haul truck transports rock to the crushing
  plant. Rocks can be crushed into many different
  sizes of aggregate with a machine called a jaw
  crusher. The machine works like a jaw by crushing
  and chewing large rocks into small rocks. It is
  usually stationed in a permanent place at the
  quarry. (Activity Chocolate Chip Cookie Mining)

11
Then

• crushed stone passes through vibrating screens.
  Screening sorts and separates the rock into the
  different sizes which our company produces.

Some stone will be washed with water to clean it
so it can be used in cement and other types of
building products. Washing removes fine grains of
sand, clay and dirt from the rock.
12
Finally

• After crushing, screening and washing, the
  crushed stone is conveyed or hauled to stock
  piles

Loaders move the rock and place it into customer
trucks when the rock is sold.
13
What is reclamation?

• The goal of reclamation is to return the land to
  a beneficial use.
• Geologist make a plan for how the quarry will
  look when mining is complete.

14

• Quarries can be turned into
• Lakes
• Wildlife parks
• Golf courses
• Office parks
• Roller coaster rides

15
How does this relate to my community?

• Operators and planners have to select a strategy
  that will benefit the community.
• They also want to make sure that their plan
  provides an economic incentive for the operator.

16
Why A Quarry Should Be In Your Neighborhood

• It is estimated that between 70 and 85 percent of
  crushed stone is used in the construction of
  roads, buildings and communities.
• A quarry is usually located closed to where
  crushed stone will be used.

17
Think About This!

• Do you think it makes a difference if the crushed
  stone is transported far away or close by?
• The distance crushed stone must be transported
  plays a significant role in it's actual cost.
  Cost for crushed stone increases as distance to
  delivery increases

18
Example..

• Think about all of the construction going on
  around us.
• Do you think our community would save or spend
  more money if the quarry were close by? Why?

19
Finally

• Having a quarry near you adds tax dollars and
  jobs to your community.
• Quarries can make good neighbors!

LIME E. STONE SAYS "A QUARRY SHOULD BE NEAR
YOU!"
20
Glossary

• Aggregate - consisting of a mixture of minerals
  separable by mechanical means.
• Economic incentive the operator needs to make
  as much money as possible in order to continue
  mining.