What is slump ,when dealing with concrete?

Answer 1

These four pages should cover just about all of it.
http://www.tpub.com/content/engineering/14069/css/14069_550.htm
http://www.tpub.com/content/engineering/14069/css/14069_551.htm
http://www.tpub.com/content/engineering/14069/css/14069_552.htm
http://www.tpub.com/content/engineering/14069/css/14069_553.htm
Hope it helps.

Answer 2

Slump is an indication of how well the concrete flows. This is important to determine how much water is in the concrete. Usually, the lower the slump, the less water is in the mix and the stronger the concrete will be. The slump is measured by putting concrete in a 12" tall cone with a flat top, then pulling the cone up and allowing the concrete to slump down. The distance the concrete falls from the top of the cone to the top of the slumped concrete is the slump. With today's concrete though, you can achieve a high slump without using much water with the application of superplasticizers or mid-range water reducers.

Hope this helps....

Answer 3

It is an indication of how wet or dry the concrete is after mixing, before you pour it.

A cone-shaped form, open at the top and bottom (like an orange highway maintenance cone) is filled with concrete, then the form is removed. The concrete will slump down a bit (lose its shape.)

If the mix is too dry, it won't slump much at all. The mix might not be fully mixed, and will be too difficult to pour.

If the mix slumps too much, the concrete is way too wet and won't achieve the rated strength characteristics. That batch of concrete should be rejected.

Slump testing is very important for concrete applications requiring high and consistent strength performance, such a bridges, tall buildings, concrete dams, etc. It should be done frequently - on almost every load of concrete mixed.

Answer 4

slump is the consistency of the mix.......gov. standards is they pour some of the mix in a cone and turn it upside down and it must stay at that form for som many mins......for everyday use u should ask for ur concrete to be a 4 slump and dont add more than 10 gals of water to it while on the truck or u void the warranty....

lic. gen. contractor