What is slump and why is it important?
Slump is used as a measure of consistency of concrete, and is most often associated with the amount of water added to the concrete mix to increase ease of placement (the higher the slump, the wetter the mix). The addition of water to increase slump beyond the design specification will result in reduced-strength potential for the concrete and possible surface deterioration. Quality Wisconsin contractors place concrete for exterior pavement applications at a moderate slump — not more than 4 to 5-inches — unless a water-reducing admixture is used.
