A Workability Test for Slip Formed Concrete Pavements

Evaluating the workability of concrete pavements prior to paving with the mixture is challenging. In this paper a novel test method is developed that measures the response of the concrete to vibration and the ability to hold an edge. The test is simple, economical, and can be completed in the laboratory or in the field. Results are presented to compare repeatability of the method with single and multiple operators and the impact of single versus sequential dosages of water reducer. Comparisons are also made between the test method and a slip formed paver. Finally, results are presented to show how the method can be used to investigate the impacts of aggregate gradation on the workability of slip formed paving mixtures.