Measuring Long-Term Strength of Concrete Using Time-Domain Reflectometry
- Summary
- Researchers at Purdue University have developed a method for measuring the water and cement content, water-cement ratio, and compressive strength of concrete from time domain-reflectometry in a nondestructive, quick manner. This method uses a step electrical pulse that is applied to a simple, rugged, disposable probe embedded in concrete and the principle of time-domain reflectometry to estimate the free water and the cement content that are used to calculate the water-cement ratio. Monitoring the signal and temperature with time allows for the calculation of long-term strength estimates based on the data gathered at short times, typically within one day.
- Technology Benefits
- Nondestructive testingFast test times
- Technology Application
- Construction industryCement companies
- Detailed Technology Description
- Vincent DrnevichPurdue Civil Engineering
- Countries
- United States
- Application No.
- 7,289,916
- *Abstract
-
- *Background
- Current techniques for measuring the properties of concrete, such as water-cement ratios and compressive strengths, are often destructive and time consuming. New technologies are needed to increase the efficiency of concrete property testing.
- *IP Issue Date
- Oct 30, 2007
- *IP Type
- Utility
- *Stage of Development
- Product
- *Web Links
- Purdue Office of Technology CommercializationPurdueInnovation and EntrepreneurshipVincent DrnevichPurdue Civil Engineering
- Country/Region
- USA
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