What should be the maximum and minimum slump of concrete?

In case of a dry sample, slump will be in the range of 25-50 mm. But in case of a wet concrete, the slump may vary from 150-175 mm. So the value of slump is specifically mentioned along the mix design and thus it should be checked as per local location.

Recommended slumps:

Reinforced foundation walls and footings:

a. Maximum Slump 75mm

b. Minimum Slump 25mm

Plain footings, caissons, and substructure walls:

a. Maximum Slump 75mm

b. Minimum Slump 25mm

Beams and reinforced walls:

a. Maximum Slump 100mm

b. Minimum Slump 25mm

Building columns:

a. Maximum Slump 100mm

b. Minimum Slump 25mm

Pavements and slabs:

a. Maximum Slump 75mm

b. Minimum Slump 25 mm

Mass Concrete Mix:

a. Maximum Slump 75mm

b. Minimum Slump 25mm

maximum 125cm minimum 75cm

maximum 100cm minimum 75cm

It varies  from country to country  and also depends on the type of the of buildings

 you should follow the condition of your country 

a. Maximum Slump 75mm

b. Minimum Slump 25mm

gernal concrete slump 75 cm +-25 cm with out pump concrete if add chemical then depend on concrete desgine

for all structure elements : maximum 75mm and minimum 25mm

but beams,columns and walls : maximum 100mm and minimum 25mm

 If it's consolidated any other way, the slump should be 5 inches or less. 

100 + & - 25

max 125 mm

min 75 mm