[an error occurred while processing this directive]
CCHRC Research and Testing Facility (RTF)
Cold-Pour Concrete Monitoring
The Cold Climate Housing Research Center is hosting a new
cold-weather concrete mixture demonstration site. The test pours are being supported by
SpringBoard. SpringBoard is a component
of the Juneau Economic Development Council, a nonprofit corporation based in Alaska.
SpringBoard and the Department of Defense are partners for this work. Funding support
is also being provided by the
Alaska University Transportation Center (AUTC), and the U.S. Army
Cold Regions Research and Engineering
Laboratory.
Additional support was provided by
University Ready Mix,
Yukon Equipment and
Geo-Watersheds Scientific.
Fairbanks Daily News-Miner article on test pours.
North Bay 10" Test Slab
The 10" Slab has 2" of underlying blueboard insulation and is approximately
10 feet by 20 feet. The slab will be used as the future home for a test generator to incorporate
hybrid fuels. There are three temperature profile measuring points. Each profile has 5 sensors locations.
One set of sensors is located 0.5" from the top of the concrete pad, another set is
located 5" from the top, and once set at the base of the concrete pad. An additional sensor is
is located at the bottom of the insulation, and a final sensor is located approximately 6"
down into the underlying earth fill material. The full pour for the slab started approximately
at noon on 3/28/06. Data collection started before the pour to help show the initial conditions.
The applied concrete initially is above freezing. After initial placement, the concrete will start
to cool until the heat of hydration begins. The slab temperature will then increase for a period
of time. Near the center of the slab, were there is more thermal mass, the temperatures will be
the highest. The temperature in the pad near the edge will be colder due to the greater heat loss
at the edges. The temperatures in the slab near the corners will have the greatest heat loss and
coldest temperatures.
The following figures show temperature profiles in various location in the test pad.
During the initial concrete pour and curing period, data is shown for the most recent 2-day and 7-day
periods.
South Bay Patio Slab, 5-6" slab, No Insulation
[ Sensors for the South Bay Patio have been moved - changes to this page are pending. ]
The 5-6" Patio Slab does not have any underlying insulation. The slab is typical of a
patio or walkway. The thickness of the slab varies some due to the preparation characteristics of
frozen ground. There are three temperature profile measuring points. Each profile has 5 sensors locations.
One set of sensors is located 0.5" from the top of the concrete pad, another set is
located halfway between the top and bottom of the slab, and once set at the base of the concrete pad.
A final sensor is located approximately 6" down into the underlying earth fill material. The full
pour for the slab started approximately at 10:00am on 3/28/06. Data collection started before the pour
to help show the initial conditions.
The following figures show temperature profiles in various location in the test pad.
Data was shown for the initial concrete pour and curing period, however we are not collecting data from these sensors at this time, so some links have been temporarily disabled.
| Plot Period |
Center Profile |
Side Profile |
Corner Profile |
Comments |
| 7-Day |
-- |
-- |
-- |
Most recent 7 days |
| 14-Day |
-- |
-- |
-- |
Most recent 14 days |
| 2-Month |
-- |
-- |
-- |
Most recent 1-2 months |
[an error occurred while processing this directive]