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CC-2 Test Strip NDT Plan & Data

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CC2 Phase I NDT Procedure and Data



Back to CC2 Phase I Experimental Test Strip

HWD Testing

On February 26, 2002, HWD testing was conducted to compare the deflections at the slab edges along both sides of the test strip (north and south lanes). Twelve points were tested at center of each slab and twenty-four points will be tested at the corners. At each location, four HWD drops with a maximum load of 7,264 kg (16,000 lbs) were conducted.


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NDT Test Results

On February 26, 2002, HWD testing was conducted to compare the deflections at the slab edges along both sides of the test strip north and south lanes. A total of 28 locations were tested on slabs 1, 2, and 3. Four HWD drops with a maximum load of 7,264 kg (16,000 lbs)  were conducted. From the HWD measured deflections, at sensor distance “zero” ( D0)  shown in  Figure 6, the following was observed:

-      The measured deflections on the “C” slabs (north lane) show evidence of joint formation. However, the deflections on the “S” slabs indicate that joint J12 has not yet been formed.



-      The deflections on the “S” slabs (new concrete mix) are consistently larger than the deflections on the “C” slabs (original concrete mix), which can be interpreted as more “curling” occurrence in the “S” slabs.

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Figure 5. Progression of Joint Formation