Slump Cones measure the workability of a fresh concrete mix in
accordance with applicable ASTM and AASHTO standards. The slump cone
test is performed for acceptance purposes, to record mixture
characteristics, or as an indirect method of determining the
water/cement ratio.
Recommended Values of Concrete Slump Tests for Various Purposes:
No. |
Types of concrete |
Slump |
1 |
Concrete for road construction |
20 to 40 mm |
2 |
Concrete for tops of curbs, parapets, piers, slabs and wall |
40 to 50 mm |
3 |
Concrete for canal lining |
70 to 80 mm |
4 |
Normal RCC work |
80 to 150 mm |
5 |
Mass concrete |
20 to 50 mm |
6 |
Concrete to be vibrated |
10 to 25 mm |
What Is a Concrete Slump Test?
A concrete slump test measures the consistency and workability of freshly mixed concrete. The concrete sample is placed into a slump cone in layers and consolidated with a tamping rod. After the cone is vertically lifted away, the reduction in height of the concrete is measured as the slump.
Deslauriers recommends a basic setup consisting of a slump cone, base, scoop and tamping rod, with additional accessories available for more convenient testing.