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Questions and Answers
What does the Windsor probe measure?
What does the Windsor probe measure?
- Relative strength of the concrete (correct)
- Presence of air voids in the concrete
- Surface smoothness of the concrete
- Water content of the concrete
How is the Windsor probe related to the type of coarse aggregate used in the concrete?
How is the Windsor probe related to the type of coarse aggregate used in the concrete?
- It has no impact on the test results
- It greatly influences the test results (correct)
- It determines the water content of the concrete
- It affects the surface smoothness of the concrete
How does the rebound hammer affect the concrete surface?
How does the rebound hammer affect the concrete surface?
- It leaves a small hole in the surface
- It leaves a small indentation on the surface (correct)
- It causes major cracks in the surface
- It has no impact on the surface
What should be done to improve the accuracy of the estimated in-place strength using the Windsor probe?
What should be done to improve the accuracy of the estimated in-place strength using the Windsor probe?
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What is the purpose of using companion cores or cast cylinders in relation to the Windsor probe test?
What is the purpose of using companion cores or cast cylinders in relation to the Windsor probe test?
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Study Notes
Windsor Probe
- Measures the in-place strength of concrete
- Related to the type of coarse aggregate used in the concrete, as the probe's results can be affected by the size and type of aggregate
- The rebound hammer, which is used in conjunction with the Windsor probe, can affect the concrete surface by creating a rebound value that is influenced by the surface hardness and roughness of the concrete
Improving Accuracy
- To improve the accuracy of the estimated in-place strength using the Windsor probe, multiple tests should be performed at different locations and depths to account for variations in the concrete
Companion Cores and Cast Cylinders
- Companion cores or cast cylinders are used in conjunction with the Windsor probe test to provide a more accurate representation of the concrete's in-place strength by comparing the probe's results with the actual strength of the cores or cylinders
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