Workability Assessment of Low-Slump Concrete (05-2349)**
Jussara Tanesi, SES Group & Associates, LLC

The slump test is the most widely used test for measuring concrete workability. Nevertheless, it is not an adequate tool for assessing “low-slump” concrete workability. In other to better quantify the workability of such concretes, U.S. Army Corps of Engineers (USACE) has developed the Vibrating Slope Apparatus (VSA). This study presents an evaluation of Vibrating Slope Apparatus (VSA). Two test methods were investigated: the original test method created by USACE, i.e., concrete mass loss under vibration as a function of time, and a method involving initial energy and time/energy to concrete movement.