1. SLUMP TEST

2. AIMS BROAD OUTCOMES UNDERSTAND THE IMPORTANCE OF WATER CONTENT
KNOW WHEN AND WHY A SLUMP TEST IS CARRIED OUT

3. Trainees will be able to:
OBJECTIVES
Trainees will be able to:
TO DETERMINE SLUMP CLASS OF A CONCRETE SAMPLE
DRAW AND LABEL SLUMP CONE APPARATUS
CARRY OUT A SLUMP TEST

4. Slump cone and tamping rod
TOOLS NEEDED
Slump cone and tamping rod
Water proof base
Trowel
Measuring tape
Concrete

5. TOOLS NEEDED
SLUMP CONE AND TAMPING ROD

6. TOOLS NEEDED
WATERPROOF BASE

7. TOOLS NEEDED
WATERPROOF BASE

8. TOOLS NEEDED
TROWEL

9. TOOLS NEEDED
MEASURING TAPES

10. TOOLS NEEDED
CONCRETE

11. WHAT IS A SLUMP TEST?
A SLUMP TEST IS A TEST OF THE WORKABILITY OF CONCRETE

12. WORKABILITY OF CONCRETE
THE WORKABILITY OF CONCRETE IS AFFECTED BY THE AMOUNT OF WATER IN THE MIX
TOO MUCH WATER CAN MAKE CONCRETE WEAK
NOT ENOUGH CONCRETE CAN MAKE THE CONCRETE TOO HARD TO WORK WITH

13. WHEN IS A SLUMP TEST CARRIED OUT?
A SLUMP TEST IS CARRIED OUT ON SITE BEFORE THE CONCRETE IS POURED IN PLACE . A SAMPLE IS TAKEN FROM THE LORRY WHEN IT ARRIVES ON SITE.

14. PROCEDURE Place the cone on a level waterproof base
Place your feet on the holding down lugs
Place 75mm of concrete in the cone and tamp 25times
Repeat this action 3 more times until the cone is full and screed off the top

15. PROCEDURE Gently lift cone from the concrete
Area cone beside concrete and put tamping rod across the top of the cone
Measure down from bottom of tamping rod to top of concrete
The measurement is the slump of the concrete

16. AVERAGE SLUMPS SLUMP CLASS SLUMP RANGE(MM) WORKABILITY S1 10-40 LOW S2
50-90
MEDIUM S3
MEDIUM/HIG H

17. CONCRETE SAMPLE ______
SLUMP CLASS
SLUMP RANGE (MM)
WORKABILITY

18. _____mm
______mm

19. What does a slump test measure?
WORKABILITY
What affects slump?
AMOUNT OF WATER IN MIX
How many times do you tamp a 75mm layer of concrete?
25 TIMES