DEFECTS IN CONCRETE

PRESENTATION

CONCRETE TECHNOLOGY

CRACKING ON FLOOR

FACTOR :

Drying shrinkage.

Step placement of concrete from well barrow.

The fast evaporation process

HOW TO OVERCOME

The dump placed correctly into the face of concrete.

The time to place concrete must suitable.

CRACKING ON BEAM

FACTOR :

Corruption of reinforcement.

Quality of concrete is less.

Standard form of cover concrete is not followed.

HOW TO OVERCOME

Use quality concrete.

Use water free from other particles.

The contractor has to be honestly.

CRACKING ON THE COLUM

FACTOR :

Silt of plastic.

HOW TO OVERCOME

Perfect vibration.

Perfect curing.

CRACKING ON WALL

FACTOR :

Joint uneffective.

Curing process is not sufficient

HOW TO OVERCOME:

Plaster back on the surface.

make the process of curing on time.

FACTOR OF CONCRETE

DAMAGE

1. Design errors.

2. Construction errors.

3. The problem of quality of construction

materials.

4. Geotechnical problems.

5. Problems that can not be predicted.

Lakaran jenis keretakan yang boleh berlaku pada struktur konkrit.

1. Errors can occur when making

the assumption the total cost,

followed by carelessness when

making detailed.

2. The design process using the

standard code can produce work

that is not well satisfied.

1. DESIGN ERRORS.

3. The designer must balance

between the theoretical and

practical design.

4. Errors in design will lead to

cracks due to excessive stress

applied to the structural elements.

The diagram describes the mechanisms of cracking due to loading.

communication between the engineer and contractor should be

agree well.

Job skills are main factors to the occurrence of any structural

damage.

ERRORS DURING

CONSTRUCTION

To produce high quality

concrete, the materials used,

such as cement and

aggregates must be in good

condition and meet the set

specifications.

All contractors working

on construction sites should

be monitored to ensure good

quality work.

MATERIALS QUALITY

PROBLEMS

GEOTECHNICAL PROBLEMS

Geotechnical problems

refers to the basic structure

or pile and the soil itself is a

problem.

insufficient number of

piles during piling or error,

or is likely also the loss of

soil bearing strength due to

the close working.

Explosion Effect

Effects of Accident

(Collision)

Earthquake Effects

Concrete Deterioration

Factors

Fire Effects

PROBLEMS CAN NOT BE

PREDICTED

TQVM PN.NORHAYATI BT PALIL

PREPARED BY :

SURAYA BT ISMAIL

ADAM BIN YUSOFF

ABDULLAH TARMIZI BIN ABD RAHMAN

RAJA NOOR AMIRA

AHMAD FITREE

YOUNG JIA EE