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Implementing Rapid Durability Measure For Concrete Using Resistivity And Formation Factor, W. Jason Weiss, Chunyu Qiao, Burkan Isgor, Jan Olek

JTRP Technical Reports

The durability of in-place concrete is a high priority issue for concrete pavements and bridges. Several studies have been conducted by INDOT to use electrical resistivity as a measure of fluid transport properties. Resistivity is dependent on the chemistry of the cement and supplementary cementitious system used, as such it has been recommended that rather than specifying resistivity it may be more general to specify the formation factor. Samples were tested to establish the current levels of performance for concrete pavements in the state of Indiana. Temperature and moisture corrections are presented and acceptable accelerated aging procedure is presented. A …

Determining The Optimal Traffic Opening Timing Through An In-Situ Ndt Method For Concrete Early Age Properties, Yen-Fang Su, Guangshuai Han, Na (Luna) Lu

JTRP Technical Reports

Developing a reliable in-situ testing method to determine the strength of concrete for traffic opening is a critical need for INDOT, due to the fast-pace construction schedule exposes concrete pavements and/or structures undergoing a substantial loading conditions even at its early ages. Nevertheless, the current methods for determining traffic opening times are inefficient and expensive, often causing construction delays or cost overruns. To address this critical need, we propose to develop an in-situ nondestructive testing (NDT) method that enables an accurate and efficient understanding of early age properties of concrete using electromechanical impedance (EMI) method coupled with piezoelectric sensors.

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