by : Nandni Rajput upcoming civil engineer the presentation on batching plant and hot mix plants and its types etc.

1. SUBMITTED TO:- ER. AMANJOT SINGH
SUBMITTED BY:- NANDNI
ROLL NO. :- 1730762
CLASS:- CIVIL(4TH)SEM

2. BATCHING PLANT
 A CONCRETE PLANT IS ALSO KNOWN AS BETCHING PLANT.IT IS A
DEVICE WHICH COMBINES VARIOUS INGRIDIENTS TO FORM
CONCRETE.
 SOME OIF THESE INPUTS INCLUDE:-
1. SAND
2. Water
3. Aggregate(rocks , gravel)
4. Fly ash
5. Admixtures
6. Cement

3. AGGRIGATES
 Aggregates forms the
skeleton matrix 60-75%
by volume.
 25-40% Paste
 1-2% Voids.
Cement-sand
Mortar
Aggregate
Aggregate shall be inert and strong.

4. CEMENT
4
– Most commonly used cement is called Portland Cement
discovered in 1824 in England, when it mixed with water,
it gets hardens, hence become hydraulic cement .
Basic raw materials used in the manufacture of
cement are calcium carbonate found in lime Stone
or chalk, and silica, alumina and iron- oxide found in
clay or shale.

5. ADMIXTURES
Chemical Admixture:- Used for specific
Property/performance enhancement.
Mineral Admixture:- Used for improvement of
long term strength and durability performance.
Using above admixtures together, high Strength and
high performance concrete Materials can be designed.

6. 2
General Outline
Concrete Production.
 Production
 Batching
 Mixing.

7. PRODUCTION PROCESS
Mixing
Compaction
Transport Placing
Curing
QUALITY CONTROL IS
MOST IMPORTANT
CONCRETE
BATCHING

8. What is CONCRETE?
– Ordinarily concrete
is made by mixing an
inorganic material
known as cement
with water together
with natural sand or
stone dusts and
natural stones which
may be uncrushed or
crushed.
Cement
Sand/
Fine Aggregate
Stone /
Coarse Agg.

9. CONCRETE &COMPOSITES
 Normal strength Concrete.
 High strength/performance concrete.
 Ultra high strength concrete.
 Fiber Reinforced Concrete.
 Densified with small particle (DSP).
 Macro Defect Free (MDF) Matrix.
 Reactive Powder Concrete (RPC).
 Polymer Concrete (PC).
 Polymer cement concrete.

10. PERFORMANCE OF CONCRETE
1. Normal strength concrete:  60MPa.
2. High strength concrete: 60  f C 120MPa.
3. Ultra High strength concrete:  120MPa.
4. Performance at fresh state:- Self Compacting
5. Long term durability performance.
 Concrete is a versatile construction material.

11. DESIGNATION OF NORMAL STRENGTH
CONCRETE
-Concrete is designated through 28 day
Standard cube compressive strength.
- In Indian Standard Code of practice
(IS456) a concrete is designated by its
characteristic cube compressive strength
at 28 days, the cube being cast, cured and
tested in a standard manner.
Concrete is designated as M25 has a 28 day
Characteristic standard cube strength of 25 Mpa.

12. ADVANTAGES AND
DISADVANTAGES OF CONCRETE
Lower life cycle cost.
Mould – ability.
Robustness.
Can be designed for desired property
Low tensile strength.
Lower ductility (brittle).
Concrete is most popular construction
material.

13. BATCHING
– Batching is the process of
measurement of specified quantities
of cement, aggregates, water and
admixture, i.e., ingredients of concrete
in correct proportion.
Batching plant:- A CONCRETE PLANT IS
ALSO KNOWN AS BETCHING PLANT.IT IS A DEVICE
WHICH COMBINES VARIOUS INGRIDIENTS TO FORM
CONCRETE.

14. TYPES OF BATCHING PLANT
 READY MIX PLANT.
 CENTERAL MIX PLANT.
 Ready mix plant (RMC):-
1. A ready mix plant combines all ingredients except for water at the
concrete plant. This mixture is then discharge into a ready mix truck.
2. water is then added to the mix in the truck . And mix during
transport to the job site.

15. Central mix plant
1. It combines all the ingredients + water at a
location.
2. The final product is transported to the job site.
3. CMP is different from RMC as it gives much more
consistent product, since all the ingredient mixing
is done at the central location and is computer
assisted to ensure the uniformity of product.

16. BATCHING PLANT
components
Components of a Batching Plant
- A) Aggregate bins for various types of
aggregates.
- B) Feeding mechanisms such as
scrappers, conveyors or hoists etc. to
transfer aggregate to scales (balances).
- C) Balance and measuring system.

17. BATCHING PLANT
components
Components of a Batching Plant
-D) Cement silos and a conveyor screw or
bucket conveyor .
-E) The storage tank for water and water
measuring system .
-F) Dispenser for chemical (liquid)
admixture.

18. BATCHING PROCESS
 – Batching by mass (weights) as
reproducibility of loose volume is
inadequate and is not economical .
 – Control and storage of materials
Aggregate bins for storing aggregate. Silos
for storing cement and cementitious
materials

19. BATCHING process
– Plant Type can be cyclic or continuous.
– Plant Type can be automatic or manual.
– Accuracy.
 Recommendation of IS 456 is 2% for the
quantity of cement measured and 3% for
the quantity of aggregate, water and
admixture being measured.

20. BATCHING PLANT
Scrapper
Fly ash silo
Cement Silos
Aggregate bins

21. BATCHING PLANT
Screw Conveyors
Control Room
Mixer

22. MIXING
– Thorough mixing is essential for production of
uniform quality concrete.
– Equipment and method should be capable of
effectively mixing concrete material containing
largest specified aggregate to produce uniform
mixtures of the lowest slump practical for the
work.

23. MIXING
– cyclic or batch mixers, and continuous
mixers.
– gravity mixers or mixers with forced
movements.
– Counter-flow mixer or open–pan
mixers

24. MIXING
– uniformity tests on samples of fresh concrete collected
from the mixer at different stages of its discharge from a
given batch.
– Mixing Time: 1minute is required for 0.75 m3 capacity
mixer and 0.25 minute is required for each additional 0.75
m3 capacity.

25. Mixers
 The centre of the concrete batching plant is known as
mixer.
 There are three type of mixer:-
1.Tilting drum mixer.
2.Pan mixer.
3.Twin shaft mixer.

26. Tilting drum mixer:- They are fast and efficient , but
can be maintenance- intensive since they include several moving
parts that are subjected to a heavy load.
Pan mixer:- pan mixer are generally lower capacity mixers . They
are used at precast concrete plant.
Twin shaft mixer:-
1.it can ensure an even mixture of concrete and large output with high
quality.
2. it consist a mixer ,with counter rotating shafts, delivers fast mixing
action and rapid discharge.

27. Tilting drum mixer Twin shaft mixer

28. PAN MIXER
.

29. PAN MIXER

30. MIXING TIME
 –increasing mixing time may result in more uniform
distribution of hydration product resulting in higher
compressive strength
 –prolonging the mixing process too long may not
increase the strength proportionally and may result in
a decrease in some cases.
 –over grinding of the material and in some cases
may increase the proportion of fines. Quite often
excessive mixing leads to segregation in case of
leaner concretes.

31. SUMMARY
 Concrete production process.
 Batching process and its importance in producing
quality concrete.
 Mixing process for producing uniform quality
concrete.

32. “Hot mix” plant
 Asphaltic concrete is a mixture of asphalt ,
coarse aggregates , fine aggregates & filler
material . After mixing we are heating them up
to final product called “Hot Mix”.
 There are two types of hot mix plant:
 Batch type plant
 Drum(continuous)type plant

33. Batch mix plant
Asphalt Batch mix plants: These plants produce hot mix
asphalt in a series of batches.
1.Cold aggregate four - bin feeder.
2.Cold conveyor.
3.Aggregate dryer.
4.Mixing chamber.
5.Asphalt tank.
6.Mineral filler unit.
7.Load out conveyor.
8.Centralized control panel.

34. Drum type plant
Drum mix asphalt plant:- These plants produce hot mix asphalt in a
continuous process. These are usually drum mix plants and counter flow
plants.
 Usually drum type plant is smaller than asphalt batch plant.
 It require less space, less energy , less energy and less efforts to run.
 The components are also less in the drum asphalt plant which make
them easy to transport.

35. THANK YOU
FOR HEARING