Introduction of PCC Concrete

What Is PCC Concrete?

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Purpose of Plain Cement Concrete (PCC)

• The Plain Cement concrete is laid to prepare a strong impermeable bed for the RCC foundation.
• The plain cement concrete is used to provide a firm layer where the soil is soft and flexible.
• It is spread on the surface of the soil to avoid the direct contact of the reinforcement with soil and moisture that is present in the soil.

PCC Ratio

Ingredients of PCC In Construction

• Cement
• Sand (Fine aggregate)
• Coarse aggregate
• Water

1. Cement:

2. Sand (Fine aggregate):

3. Coarse Aggregate:

4. Water:

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Making of PCC Concrete

• Selection of Ingredients required for PCC.
• Mixing of all Ingredients.
• Transportation and placing of PCC.
• Compaction of PCC.
• Finishing of the concrete.
• Curing of concrete.

1. Selection of Ingredients required for PCC:

2. Mixing of all Ingredients:

3. Transportation and Placing of PCC:

4. Compaction of PCC:

5. Finishing of the Concrete:

6. Curing of Concrete:

Methods for Mixing of Concrete

• Hand Mixing of the Concrete.
• Machine Mixing of the Concrete.
• Ready Mix Concrete.

1. Hand Mixing of Concrete:

Process of Hand Mixing of Concrete

1. The Hand mixing of the concrete should be done on a rigid, clean, and non-porous surface so that there will not be any loss of water from the mix of the concrete.
2. Use the measurement boxes for the batching of various ingredients of the concrete.
3. First upon, the dry mix of the concrete is prepared by mixing all the ingredients of concrete except water.
4. The measured amount of water then added at the center of the dry mix of the concrete and mix the concrete properly so that the uniform concrete mix will be formed.
5. Add water in the dry mix step by step and in a very slow manner. Don’t add full water as it will flow out and the concrete with required consistency will not be formed.
6. Mix all the materials for at least 3-5 minutes until a uniform homogenous concrete mix will not be formed.

Precautions to Be Taken During Shaking the Concrete

• The base platform at which the concrete is mixed and prepared should be clean and should not absorb water.
• The tools and equipment which are used in the mixing of the concrete should be clean and in good working condition.
• The aggregate should not contain any kind of dirt and debris, if there any impurities present wash it properly.
• The labors should wear all the safety equipment while working on site.
• The platform at which the concrete is mixed should be cleaned at end of the day.

2. Machine Mixing of Concrete:

Process of Machine Mixing of Concrete

• Firstly, the internal surface of the concrete mixer is sprinkles with water.
• The coarse aggregates are added in the concrete mixer which are followed by the sand and then cement.
• The ingredients are mixed dry in the concrete mixer for approx. 2 min to 5 min.
• After proper mixing of the ingredients in the dry state, the water is added slowly in the appropriate amount.
• Do not add extra water as it will reduce the strength of the concrete.
• After adding water in the concrete, the concrete should be mixed for at least 2 minutes so that the homogenous concrete will be formed.

• The concrete mixer should be made wet before using it.
• The time, speed and the number of revolutions of the concrete mixer drum should be followed as per given by the manufacturers of the mixer machine.
• The concrete should be used within 30 minutes after mixing and discharging from the concrete mixer.
• If the concrete mixer is of continuous type, then it is necessary that the mixer should be clean at a fixed interval of time.
• The internal part of the concrete mixer should be inspected regularly to check whether there any damages to it.

3. Ready Mix Concrete

Factors Affecting Method of Mixing of Concrete

1. Location of the construction site also affects the method of the mixing of the concrete.
2. Volume of the concrete required for the construction also governs the type of method mixing to be used on the site.
3. The method of concrete mixing is also affected by the cost of the construction project.
4. Height at which the concrete is to be placed.
5. Nature of the work for which concreting work is to be done.

Work Procedure of PCC Construction

1. All the materials that are required for making PCC are selected. The batching, mixing, placing and compacting is done.
2. The required cement, sand and aggregates are taken as per the required proportionate quantities and form a depo.
3. It is recommended to dump a depo required for a half bag for better and uniform mixing of all the ingredients.
4. Firstly, mix the dry depo properly with the help of the spade and ensure that the all ingredients are mixed properly.
5. Add the required quantity of water in the mixture and mix it properly to make the concrete workable.
6. Place the concrete at the required location. The Plain cement concrete is directly placed to the required place by the means of labors or pump depending upon the nature of the construction work.
7. The concrete should be compacted properly with the help of steel rod or  vibrator depending upon the depth of the PCC.
8. The sides of the shuttering should be properly tamped and finished with the help of Thapi in order to get a smooth and uniform finish after de-shuttering.

Uses of PCC Concrete

1. Plain cement concrete (PCC) is mainly used for the foundations of the structures.
2. PCC provides a leveled surface for the construction of the footings.
3. Plain cement concrete is also used for making Tennis courts, Basketball courts etc.
4. It is also used in construction of the storm or sewer on drains.
5. Plain cement concrete avoids the direct contact of the foundation with soil and moisture.
6. PCC is used for the construction of the pavements and the protection of Plinth.
7. It is also used for concrete coping over the parapet walls as well as compound walls.

PCC Concrete Grades

• Normal Grade of Concrete
• Standard Grade of Concrete
• High Strength of Concrete

1. Normal Grade of Concrete

• Standard Grade of Concrete
• The Standard Grade of concrete are M25, M30, M 35 which are used in the Reinforced cement concrete (RCC) works.

• M20 grade of concrete is usually used for the construction of the Reinforced cement concrete (RCC) for the construction of the slabs, beams, columns, and footings etc.
• M45 and M50 grade of concrete is also used in the construction of the runways, prestressed concrete girders, and prestressed beams etc.

2. High Strength Concrete

Do’s and Don’ts of PCC Works

Advantages of PCC Concrete

1. Plain cement concrete provides a rigid Impervious bed for the construction of the foundation.
2. PCC helps to provide a level to foundation construction and avoid unequal settlement of the foundation.
3. It also helps to avoid direct contact of the foundation reinforcement with the soil which may cause dampness due to the action of capillarity.
4. The required coverage for the lower reinforcement of the RCC foundation is ensured as the cover blocks rest on the firm Plain cement concrete.
5. It forms a barrier and avoids direct contact with the reinforcement due to the corrosion of the reinforcement is restricted.
6. It provides ease in the placement of the Steel cages and increased productivity.

Disadvantages of PCC Concrete

1. The Tensile strength of the Plain cement concrete (PCC) is very low as it does not consist of reinforcement.
2. Due to low Tensile Strength, there may be chances of the development of cracks in the PCC.
3. It required adequate curing till hydration to achieve the desired strength of the concrete.

PCC Concrete

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What Is Difference Between Lean Concrete and PCC?

PCC Material

PCC in Construction

What Is the Ratio for PCC?

Where Is PCC Concrete Used?

Which Is Better PCC or RCC?

Why Do We Give PCC?

Which Cement Is Best for PCC?

Which Grade Cement Is Best for PCC?

Which Grade Cement Is Used for PCC?

Why Is PCC Used in Construction?

PCC Construction

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