Measuring Long-Term Strength of Concrete Using Time-Domain Reflectometry
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.
Nondestructive testingFast test times
Construction industryCement companies
Vincent DrnevichPurdue Civil Engineering
United States
7,289,916
美国
