https://orcid.org/0000-0002-4446-1605
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ABSTRACT
Partial-depth repairs performed on jointed concrete pavements have not always achieved their expected service life. High stresses generated due to incompatibility between the repair material and the in-situ concrete can contribute to reduced life. A coupled laboratory and computational investigation were performed to quantify the contribution of different incompatibilities to additional stresses generated in a partial depth repair, and to identify the critical incompatibility criteria. Then, a guideline to design a performance-engineered repair mixture (PERM) for a material-compatible repair (MCR) was developed. Based on the results, thermal expansion compatibility between the repair material and the in-situ concrete and controlled drying shrinkage of the repair material are the two main compatibility criteria. The thermal expansion compatibility criteria can be achieved by a mindful selection of coarse aggregate type for the repair material. In addition, controlled drying shrinkage criteria can be achieved through internal curing. The results also indicate that using an MCR can reduce stresses induced at the bond interface by up to 50% when compared to that of conventional repair materials.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Data availability statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Notes
1 It should be noted that the results and conclusions provided in this study are valid for other types of cement, too. Type I OPC was selected for this study solely because it a widely used cement. However, the guideline developed in this study is independent of the cement type.