What describes no-slump concrete?

No-slump concrete is characterized by its very low workability, specifically when it has a slump of 1 inch or less. This type of concrete is typically quite stiff and is used for applications where a robust mixture that can hold its shape is required, such as in precast elements, roadways, or various structural components.

The low slump indicates that the concrete will not flow easily, making it suitable for situations where high stability is necessary. The nature of no-slump concrete also means that it can be placed in forms with minimal spreading, thus maintaining its shape and integrity during the curing process.

In contrast, options referring to the use of concrete mainly in exterior structures, a higher slump, or simply having high compressive strength do not accurately define no-slump concrete since they do not address the specific characteristic of slump measurement which is the defining feature of this type of concrete.