Ready-mix concrete is a ready-to-use material consisting of predetermined mixtures of cement, sand, aggregates and water. It is manufactured in a batching plant according to given proportions, then delivered in trucks with mixers to the work site. This results in precise mixtures that allow specialized concrete to be used on construction sites. Each batch is tailored to the contractor's specifications and delivered in a plastic state in cylindrical trucks. Ready-mix concrete is sometimes preferred over on-site mixing due to its ability to precisely control mixtures and reduce work site confusion.

1. READY MIX
CONCRETE

2. INTRODUCTION
• Ready-mix concrete (RMC) is a ready-to-use material, with
predetermined mixture of cement, sand, aggregates and
water.
• The Idea of Ready Mix Concrete (RMC) was first introduced
by Architect Jurgen Heinrich Magens, he got his patent of
RMC in Germany in 1903.
• It is manufactured in a cement factory, or specifically
known as the batching plant, according to a given set of
proportions, and then delivered to a work site, by truck
mounted with mixers.
• This results in a precise mixture, allowing specially
developed concrete mixtures to be implemented on
construction sites.
• Each batch of ready-mixed concrete is tailor-made
according to the specifics of the contractor and is delivered
to the contractor in a plastic condition, usually in the
cylindrical trucks often known as "cement mixers”.
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RMC being delivered to a site and put to work

3. INTRODUCTION
• The increasing availability of special transport vehicles, supplied
by the new and fast growing automobile industry, played a
positive role in the development of RMC industry.
• Ready mix concrete is sometimes preferred over on-site concrete
mixing because of the volume it can produce with precision of
proportion of mixtures and also due to reduced work site
confusion.
• RMC is manufactured under controlled operations.
• The performance of a concrete mix can be altered by use of
admixtures.
• Concrete has a limited lifespan between batching / mixing and
curing. This means that ready-mixed concrete should be placed
within 30 to 45 minutes of batching process.
• It has a long life span on use, when compared to other products
of a similar use, like road ways.
3
A mini Ready-mix Concrete plant

4. HISTORY
• Ready mix concrete was first patented by the German architect Jurgen Heinrich
Magen in 1903.
• Despite this discovery, attempts to supply the building trade did not take off until
the late 1920’s.
• This was successfully achieved by the new range of used trucks which were
fitted with a drum to move the concrete during transportation.
• The first ready mix company to set up in the UK took place in 1930, and it was
only later on in the 1960’s that a successful network of concrete firms had
established themselves in the construction industry.
• In India Ready Mix concrete plant was launched in 2010.
• Lack of proper manuals, higher initial costs than conventional site mixed
concrete, high initial investments for installation of automatic batching plants and
also lack of awareness were the major causes that led to an initial set back to
Ready Mix concrete industry.
• But in India about 3% of the total cement produced is utilized in Ready Mix
concrete plant against 70% of the cement produced being utilized in UK and US.
• In today’s construction market, read ymix concrete is used on a daily basis. The
professional services of Base Concrete are used for the specialist and quality
concrete mixes which are produced.
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• For construction companies, ready mix concrete reduces labor costs and increases the amount of space they have on-site.

5. OBJECTIVES
• To produce better quality of concrete
• Elimination of storage space for basic materials at
site.
• Elimination of Procurement / Hiring of plant and
machinery.
• To avoid wastage of basic materials.

6. READY MIX CONCRETE SITE MIX CONCRETE
Consistent Quality – concrete is made in high
tech bathing plants in a computerized
environment.
Quality is inconsistent – because concrete is hand
mixed.
Construction is double quick time. Manual mixing is time consuming.
Projects take longer time to finish.
Raw materials are chosen after strict material
check.
Quality of raw material is manually checked, or
not checked at all.
Large quantities of concrete can be ordered. This
allows to handle projects of any size.
Takes more time. Repeated mixing needs to be
done for large quantities a the mixer will be too
small to handle the requirement,.
No wastage of raw materials at site. Everything is
premixed at plants, based on the needs.
High wastage of raw material due to manual
mixing.
No hassle of managing labour on site. Involves the use of labourerd for mixing of
concrete on site.
There is no worry about pilferage. Risk of pilferage of raw materials is high.

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7
MATERIALS
AGGREGATE ADMIXTURE
CEMENT WATER
COARSE FINE MINERAL CHEMICAL
MATERIALS REQUIRED

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8
8
 AGGREGATE :-
 FINE AGGREGATE:-
• Aggregate whose size is 4.75 mm and less is considered as fine aggregate.
 COARSE AGGREGATE:-
• The size of the aggregate bigger than 4.75 mm is considered as coarse aggregate.
 CEMENT:-
 OPC (ORDINARY PORTLAND CEMENT):-
• Portland cement is the most common type of cement in general use around the
world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout.
• It is a fine powder, produced by heating limestone and clay minerals in a kiln to
form clinker, grinding the clinker, and adding 2 to 3 percent of gypsum.
 PPC(PORTLAND POZZOLANA CEMENT):-
• PPC cement is generally used for plastering, brick masonry and waterproofing
works.
• PPC has a lower heat of hydration and it is prone to fewer cracks compared to
OPC.
• PPC has lower strength than OPC but PPC provides better workability and
finishing than OPC.
 WATER:-
• The pH value of water should be in between 6.0 and 8.0 according to IS 456-2000.

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9
 ADMIXTURES :-
 CHEMICAL ADMIXTURES:-
• Air-entraining admixtures (mainly used in concrete exposed to freezing)
• Water-reducing admixtures, plasticizers (reduce the dosage of water while maintaining
the workability)
• Retarding admixtures (mainly used in hot weather to retard the reaction of hydration)
• Accelerating admixtures (mainly used in cold weather to accelerate the reaction of
hydration)
• Super plasticizer or high range water-reducer (significantly reduce the dosage of water
while maintaining the workability)
 NATURAL ADMIXTURES:-
• The fly ash is generally used in the concrete in the following ways.
 As partial replace for cement.
 As partial replacement for sand.
 As simultaneous replacement for both cement and sand.

10. EQUIPMENTS REQUIRED:
Silos:-
• Cement and fly ash are stored in a airtight container
called Silos.
• The required amount of cement and fly ash is
extracted by the silos.
• Due to the sensitivity of cement and the cement
supplement to moisture, this is always an enclosed
system.
• Silo Diameter is 2800/3200/3500 mm.
• Shell Thickness 5 mm
• Bottom Cone Section 6 mm Thick
• Top Shell in 5 mm Thick.

11. EQUIPMENTS REQUIRED:
Mixers:-
 The center of the concrete batching plant is the
mixer.
 There are three types of mixer:-
 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 mixers are generally lower capacity mixers
at about 4 to 5 yd3 and are used at precast
concrete plants.
 Twin shaft mixer
• The twin shaft mixer can ensure an even
mixture of concrete and large output with high
quality. It consist of mixer, with Counter
rotating shafts, delivers fast mixing action and
rapid discharge.
Tilting Drum Mixer
Pan Mixer
Twin Shaft Mixer

12. EQUIPMENTS REQUIRED:
 Control Room:-
• The programmable controller can control the production process
with high reliability and stability.
• It can control the unloading ingredients, mixing and automatic
control of the whole process of the concrete.
 Aggregate Batcher:-
• The aggregate batching system includes aggregate supply system,
weighing system and electrical control system.
• The feeding device is driven by conveyor belt.
 Conveyors:-
• Conveyor Systems are mechanical devices or assemblies that
transport material with minimal effort.
• While there are many different kinds of conveyor systems, they
usually consist of a frame that supports either rollers, wheels, or
a belt, upon which materials move from one place to another.

13. A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
A. Aggregate Delivery
B. Aggregate receiving
hopper
C. Aggregate Storage
D. Conveyor Belt
E. Cementitious material
Storages
F. Weigh Hopper
G. Cement Delivery
H. Mixer
I. Admixtures
J. Ready Mix Truck With
Returned Concrete
K. Recycled Water
L. Reclaimed Aggregates
M. Pump
N. Water Storage
O. Concrete Loaded in Ready
Mix Truck
P. Control Room

14. GRADES OF CONCRETE
S o u r c e

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Classification Grade RATIOS OF CONCRETE MIX Applications
Ordinary
M10 1:3:6 PCC (Plain Cement Concrete) e.g. Levelling course, bedding for
footing, concrete roads, etc.
M15 1:2:4 PCC e.g. Levelling course, bedding for footing, concrete roads, etc.
M20 1:1.5:3 RCC (Reinforced Cement Concrete) e.g. Slabs, beams, columns,
footings, etc. (for mild exposure)
Standard
M25 1:1:2 RCC (Reinforced Cement Concrete) e.g. Slabs, beams, columns,
footings, etc.
M30 1:0.75:1.5 RCC e.g. Slabs, beams, columns, footings, etc.
M35 1:0.5:1 RCC e.g. Slabs, beams, columns, footings, etc.
M40 1:0.25:0.5 RCC e.g. Pre-stressed concrete, slabs, beams, columns, footings, etc.
M45 As per Mix Design
RCC e.g. Runways, Concrete Roads (PQC), Prestressed Concrete
Girders, RCC Columns, Prestressed beams.
M50
As per Mix Design RCC e.g. Runways, Concrete Roads (PQC), Prestressed Concrete
Girders, RCC Columns, Prestressed beams.
M55 As per Mix Design RCC e.g. Prestressed Concrete Girders and Piers.
High Strength
M60 -
M80
As per Mix Design
RCC work Where high compressive strength is required such as high
rise buildings, long span bridges, ultra-thin white topping, etc. and
constructions in aggressive environment e.g. Spillways of dams,
coastal construction.

16. TO MAINTAIN THE QUALITY OF
CONCRETE :
• Ready-mix trucks, used for transportation of concrete should clean prior
to loading each time.
• The compression machine which used to finding out compressive
strength should be checked regularly.
• To ensure the quality of all materials used in the production of R.M.C.
They should test for size, shape, cleanliness, density, and moisture
content.
• Sieve analysis on all aggregates and sands performed regularly to ensure
particle size distribution.
• During the transportation of RMC from plant to site, The drum should
agitate to avoid the setting of concrete.
• Depends upon the lead distance, if the time elapsed between plant and
site more, than some admixtures should add in concrete to increase the
setting time.
• The labor used at the site and with a truck should be skilled.
• Concreting is an intermittent process, so as there should be the
availability of concrete without break.

17. APPLICATIONS
Ready mix concrete can be used for a vast array of applications including:
• Civil engineering projects
• Road developments
• Foundations
• Bridges
• Walls
• Floors & bases
• Driveways
• Footpaths.
Any type of construction that requires a durable material can
benefit from the strength and convenience of ready mix concrete.

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• Ready Mix Concrete (RMC) allows speedy construction through programmed
delivery at site, mechanized operation with consequent economy.
• RMC reduces the labor cost and site supervising cost.
• RMC comes with consistency in quality through accurate & computerized control
of sand aggregates and water as per mix designs.
• Production of RMC helps in minimizing cement wastage due to bulk handling.
• Production of RMC is relatively pollution free. Environment-friendly.
• Reduced project time resulting in savings in all aspects.
• Proper control and economy in use of raw material resulting in saving of natural
resources.
• Better quality concrete is produced as it is made from consistent methods and in
advanced equipment.
• No need to store construction materials at the site.
• No delays in completing major projects like constructing dams, roads, bridges,
tunnels, etc.
• Safe work practices - No disruption in the project schedules.
Advantages of Ready-Mix Concrete

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Disadvantages of Ready-Mix Concrete
• Requires huge initial investment.
• Not suitable for small projects (less quantity of concrete is required).
• Need an effective transportation system from the batching plant to
the job site.
• Labor should be ready at the site to cast the concrete in position
without any delay to avoid slumps in the mixture.
• Concrete has limited time and should be used within 210 minutes of
batching the plant. Traffic jam or breakdown of the vehicle can
create a problem.
• It will generate additional road traffic. Generally, Ready Mix Trucks
are large in size and may cover lot of area in the road blocking other
traffic.

20. TRANSPORTATIO
N
• Ready Mixed Concrete shall be transported
from the mixer to the point of placing as
rapidly as possible and practicable by
methods that will maintain the workability
and will prevent segregation loss of any
constituents or ingress of water or foreign
matter.
• The concrete shall be delivered at the site of
work and discharge shall be completed with-
in Two hours of adding mixing water to the
dry mix of cement and aggregate.
• Before the delivery of concrete produced in
Ready Mixed Plant/ captive Batching Plant it
is the responsibility of the producer to
ensure that each truck mixer is inspected to
confirm its compliance with the
requirements.

21. TRANSIT
MIXED
CONCRETE
CENTRAL
MIXED
CONCRETE
SHRINK
MIXED
CONCRETE
MIXING
PROCESS

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TRANSIT MIXED CONCRETE
In transit mix concrete, all of the raw ingredients are loaded directly into the truck mixer. No plant mixer is involved. Some or all of
the mixing water is usually introduced at the plant. The mixer drum is rotated at charging speed during loading.
1. In Transit Mixing, the dry materials are proportioned at the RMC
plant, the water being added & the mixing done in route to the job in
a truck mixer, which essentially consists of a mixer drum mounted on
a conventional chassis.
2. Power for rotating the drum is obtained either from the truck
engine or from an independent petrol engine.
3. The truck mixer is provided with a water supply tank with
equipment for measuring the quality of water entering the drum, & a
revolution counter indicating the extent of mixing.
4. As soon as the mixer drum is charged with its complete batch of
materials from the batching plant, the truck proceeds to the concrete
pouring point, the mixing operation taking place in route, the water
level and the mixing controls being operated by the driver; where the
length of the haul is long, delivery of freshly mixed concrete is
assured by starting the mixing operation towards the end of the haul.
5. On arrival at the worksite, the concrete is discharged over
detachable chutes into receptacles or directly on to the forms.

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PARTS OF TRANSIT MIXER
 DRUM AND BLADES:-
• The mixing drum is made of high abrasion resistant steel and blades of high
abrasion resistant alloy steel to mix any type of ready mix concrete and to
discharge it smoothly.
 HOPPERS:-
• Wide mouth hopper specially designed to receive sticky ready mix concrete in
large quantities with ease.
 HOPPER STEPS AND HANDRAIL:-
• Layout of hopper steps and handrails are made user friendly for standing at ease
for cleaning purpose ensuring better safety.
• Side steps made from rust proof steel are attached as a standard equipment
with stripes for anti slip and fender for easy movement.
 SCOOP:-
• Scoop is made from Abrasion resistant steel for durability and weight
reduction Instead of traditional MS thick plates with liners.

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CENTRAL MIX CONCRETE
• In central mixing, both the operations of proportioning & mixing are
carried out at a batching plant & deliver the mixed concrete to the site
in an agitator truck, which keeps the mix concrete in correct form.
• In case of centrally mixed type, the drum carrying the concrete
revolves slowly so as to prevent the mixed concrete from “segregation”
& prevent its stiffening due to initial set. • Central mixing is resorted to
when there is likely to be a considerable period lag between the time of
mixing and the time of placing. With agitation a maximum of one and
half hours between mixing & placing can be allowed.
• Another important consideration in favour of central mixing method
is the fact that more concrete can be transported in a single trip when
the truck-mixer is used as an agitator.
• The effect of this is to reduce the transportation charges, all other
factors being equal.

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SHRINK MIX CONCRETE
• Shrink mix concrete is partially mixed in a central mixer
and then charged into a truck mixer, where the mixing is
completed.
• The truck mixer is turned at high speed while charging the
concrete. Mixing can be completed at the plant or at the job
site.
• The number of revolutions needed to complete the mixing
of shrink mix concrete in the truck mixer varies depending
on the size of the central mixer vessel and the duration of
mixing or co-mingling of all of the ingredients (often less
than 90 seconds), but generally about 30 turns of the mixer
truck drum produces mix uniformity throughout the load.

26. MARKET SURVEY
S o u r c e
h t t p s : / / d i r . i n d i a m a r t . c o m / i m p c a t / r e a d y - m i x e d - c o n c r e t e . h t m l
h t t p s : / / d i r . i n d i a m a r t . c o m / s e a r c h . m p ? s s = r e a d y + m i x + c o n c r e t e + i n + n o i d a & s r c = a s -
c o n t e x t % 3 A k w d % 3 D r e a d y m i x c o n c r e t e i n % 3 A p o s % 3 D 1 0 % 3 A c a t % 3 D 5 3 % 3 A m c a t % 3 D 3 6 1 3 1 &
p r d s r c = 1 & m c a t i d = 3 6 1 3 1 & c a t i d = 5 3 & c q = n o i d a & c q _ s r c = c i t y - m c a t
h t t p s : / / d i r . i n d i a m a r t . c o m / d e l h i / r e a d y - m i x e d - c o n c r e t e . h t m l

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COMPANY GRADE PRICE
A1 Ready Mic Concrete (Chappraula, Delhi) M35 ₹3300 per cubic meter
Garg Redimix Pvt Ltd. (Delhi) M7.5 – M50 ₹4000 per cubic meter
Gupta Trading Co. (Delhi) As per requirement ₹6100 per cubic meter
Nutech Concrete (Delhi) M35 ₹4400 per cubic meter
Shree Building Solutions Private Ltd. (Goa) As per requirement ₹5200 per cubic meter
Gahlawat Cement Agency (Delhi) M30 ₹4700 per cubic meter
Build Makaan (Delhi) As per requirement ₹4600 per cubic meter
M/S. Shiv Traders (Sector 22, Noida) As per requirement ₹4000 per cubic meter
Shri Krishna Contraction Company And Earth
Movers (Noida)
M20 ₹4600 per cubic meter
Shripati Infraprojects Pvt. Ltd. (Noida) M10 – M50 ₹4000 per cubic meter
KR Kannappa Chettiar (Chennai) M20, M25, M30 ₹4600 per cubic meter
Kishan Trading Co. (Ahmedabad) M10, M20, M25, M30 ₹4550 per cubic meter
B-Easy Solutions India Private Limited (Bengaluru) As per requirement ₹4100 per cubic meter
Kashyap Incorporation (Jalandhar) M20, M25, M30, M35, M40 ₹3500 per cubic meter

28. THANK YOU!