Everything about slump test

1. SLUMP TEST
ASTM C-143
Presented by Muhammad Bilal
UET peshawar

2. What is slump test?
This test is used to check the
consistency (fluidity) of concrete in a
batch
The slump test measure the workability
of the concrete or the ability of concrete
to flow, workability related to the type of
construction, placing and finishing
methods

3. Apparatus used in this test
• Slump cone
Dimensions are ( upper dia 4inch lower 8inch height 12”)
• Tamping rod

4. Procedure for slump test
• First mix all the ingredients to form a concrete mix
• Now sample of concrete is placed in slump cone
in three layers each layer is tamped 25 times so it
can set well
• Now slump is removed and the concrete is
allowed to subside
• The distance by which concrete falls is called
slump
• This test is very popular due to simplicity

5. Different types of slump
• True slump ( slump 1-2 inches)

6. Types Cont..
• Collapse slump (slump greater than 4 inches)

7. Types Cont..
• Shear slump (slump 2-4 inches)

8. Tamping procedure

9. slump and workability
• Slump between 1 to 2 (25mm-50mm) inches means that
the concrete mix has low workability
• Slump between 2 to 4 inches indicates medium
workability
• Slump greater than 4 inches indicates higher workability