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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

Country/Region

USA

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