What is a common test method for assessing the workability of concrete other than the slump test?

The Vebe test is a well-established method used to evaluate the workability of concrete, particularly for mixtures that may not provide reliable results through the traditional slump test. This test is especially beneficial for assessing the workability of very dry or sticky mixes, which can be challenging to measure with a slump cone.

In the Vebe test, a standard vibrating table is used, and the time it takes for a concrete sample to undergo complete consolidation is measured. The more workable the concrete is, the less time will be required for it to flow and consolidate on the vibratory surface. This method allows for a more dynamic evaluation of workability, capturing the concrete's behavior when subjected to vibration and simulating conditions that may occur during actual placement.

While the other options listed serve important roles in concrete testing—such as assessing compressive strength (which is crucial for structural integrity) or obtaining core samples for analysis—they do not directly measure workability. The lateral pressure test is generally used to assess how concrete behaves under lateral loads, rather than its workability. This makes the Vebe test a specific choice for determining how easily concrete can be worked and placed during construction.