2016-01-18_REPORT - M1977493

• Permit No: M1977493
• IBM Index Class Name: REPORT
• Doc Date: 1/18/2016
• Doc Name: Asbestos Disposal Shaft Closure Report
• From: Climax Molybdenum
• To: DRMS
• Email Name: ECS
• Media Type: D
• Archive: No

SPECIFICATION NUMBER:
Climax MolybdenumCONCRETE CONSTRUCTION 03 30 00 SPE
A Freeport-McM°Ran Company TECHNICAL SPECIFICATION PROJECT NAME:
CAVR Shaft Closure Project
2. Concrete temperatures and curing periods shall conform to the following
charts:
a. Minimum Concrete temperature(*) as delivered:
Minimum Placement Dimension
Ambient Temperature Less Than „ „ Larger than
12”
12"-36" 36"-72" 72"
Above 30°F 60°F 55°F 50°F 45°F
0°F to 30°F 65°F 60°F 55°F 50°F
Below 0°F 70°F 65°F 60°F 55°F
(*)Concrete temperature as delivered shall not exceed the above minimum concrete
temperatures by more than 15°F.
b. Concrete temperatures as placed and maintained for curing period:
Minimum Placement Dimension
Less Than 12"-36" 36"-72" Larger
12" Than 72"
Min.Concrete Temp 55°F 50°F 45°F 40°F
Max.Air Temp.at 75°F 70°F 65°F 60°F
Concrete Surface
Min.Curing Period 7 7 6 5
(Days)
c. Temperatures of forms., reinforcements, embedments or earth to be
in contact with fresh concrete shall be at least 35°F, but shall not
exceed 60°F.
d. Enclosures shall be windproof, weatherproof and provide for the
circulation of air in contact with concrete surfaces or forms.
e. Heating units shall be located so as not to heat or dry the concrete
locally. Heaters shall be vented, if necessary, so that the concrete is
not exposed to carbon dioxide. Open type or oil pot salamanders
shall not be used.
f. Blanket or batt insulation shall be protected by a tough moisture
proof cover from wind, rain or snow which will impair its insulating
properties. Such insulation shall be lapped and kept in close contact
with the concrete or formed surfaces.
114-910345 CONCRETE CONSTRUCTION
Climax CAVR Shaft Closure Project 03 30 00 SPE-22