We just ran across a requirement for no-slump concrete. What concretes are considered to be no-slump concretes?
According to ACI's Cement and Concrete Terminology (ACI 116R-90), no-slump concrete is freshly mixed concrete exhibiting a slump of less than 1/4 inch. Zero-slump concrete is defined in the same document, as concrete of stiff or extremely dry consistency showing no measurable slump after removal of the slump cone. And negative-slump concrete is concrete of a consistency such that it not only has zero slump but still has zero slump after additional water is added.