Durability Of Saw Cut Joints In Plain Cement Concrete Pavements

The objective of this project was to evaluate factors influencing the durability of the joints in portland cement concrete pavement in the state of Indiana. Specifically this work evaluated the absorption of water, the absorption of deicing solutions, the relationship between the degree of saturation and concrete deterioration, and the role of Soy Mehyl Esters as a potential concrete sealant. The aforementioned items were studied in conjunction with the observation of premature joint deterioration in concrete pavements. To better understand the potential mechanisms responsible for joint deterioration, a series of mortars were tested that are consistent with the mortar fraction of concrete paving mixtures. The first portion of the work examined the role of deicing salt solutions on the wetting and drying behavior of concrete elements (this was a joint series of experiments with SPR 3093). The second portion of the work examined the concept of the degree of saturation and its relationship with freeze-thaw damage. Specifically mortars with different air contents were examined. The final portion of the work examined the potential use of penetrating concrete sealers (like soy methyl esters) to reduce water absorption and the corresponding freeze-thaw damage.