1. COMPACTING FACTOR TEST
NO GROUP MEMBERS METRIC NO
1 DOROTHY CANDIE DOMINGGO 20DKA14F2019
2 NUR FATIHAH ABDULLAH 20DKA14F1806
3 CLINTON SEMPURAI ANAK PETER SUMBANG 20DKA14F2020
4 SAFUAN BIN SARBANI 20DKA14F2018
2. WHAT IS COMPACTING FACTOR
TEST?
- To determine the workability of freshly
mixed concrete.
3. PROCEDURE?
1. Concrete and water cement is mixed into upper hopper.
Concrete excess must be levelled accordingly.
2. The trap door of upper hopper is opened in order for the concrete
to fall into the lower hopper.
3. The trap door of lower hopper is opened for the concrete to fall
into the cylinder
4. The remaining concrete which remains above the top level of
cylinder is cut off by plane blades.
5. The concrete in the cylinder is weighed and labeled as partially
compacted concrete.
6. Fresh sample of concrete is filled into the cylinder and vibrated
until it is fully compacted.
7. It is then weighed and labeled as fully compacted concrete.
4. METHOD OF CALCULATION
Consistency Compacting Factor
Very Dry 0.70
Very Hard 0.78
Hard 0.85
Plastic Hard 0.89
Plastic 0.92
Liquid 0.95
High Liquid 1.00
5. FACTORS THAT AFFECT
CONCRETE STRENGTH
1. RELATIVE HUMADITY
The hydration cannot proceed without moisture.
If the concrete is allowed to dry out, the hydration
reaction will stop.
The three curves shows the strength development of
similar concretes exposed to different conditions.
7. 2. WATER / CEMENT RATIO
The workability of the concrete is reduced if the
water/cement ratio is reduced.
A lower water cement ratio means less water, or more
cement and lower workability.
If the workability becomes too low the concrete becomes
difficult to compact and the strength reduces.
8. STRENGHT
WATER / CEMENT RATIO
The relation between water cement ratio
and strength of concrete
9. 3. TEMPERATURE
The rate of hydration reaction is temperature
dependent.
Temperature increases, the reaction also increases.
The concrete kept at higher temperature will gain
strength more quickly than a similar concrete kept at
a lower temperature.
