Ready mix concrete scm comp final

Ready Mix Concrete- Supply Chain Management
-Presented by saakshi mehta

READY MIX CONCRETE HISTORY
 Ready mixed refers to concrete that is batched for delivery from a central
plant instead of being mixed on the job site
 First factory was established in the 1930s
 Ready mix concrete is sometimes preferred over on-site concrete mixing
 Ready Mixed Concrete is also referred as the customized concrete products
for commercial purpose
3/29/2014Ready Mix Concrete 3

 As early as 1909, concrete was delivered by a horse-drawn mixer that used
paddles turned by the cart's wheels to mix concrete en route to the jobsite.
 In 1916, Stephen Stepanian of Columbus, Ohio, developed a self-discharging
motorized transit mixer.
 Ready Mixed Concrete is manufactured under controlled operations and
transported and placed at site using sophisticated equipment and methods
READY MIX CONCRETE HISTORY

READY MIX CONCRETE
• Concrete is produced in industrial plants containing storage facilities and
equipment
• The majority of concrete production facilities are located nearby areas
where concrete is used
• A concrete factory must be located within a radius of 20 to 30 km from the
work site, depending on traffic conditions.

A VERY PRECISE MANUFACTURING PROCESS
Silos that contain cement, sand, gravel
preparation bin.
water dosage
mixing
transit mixer

TRANSMIXER
 Designed especially for transporting the fresh
concrete
 Among the most important production tools
Carrying capacities of 4, 6, 8 and even 12
cubic meters

READY-MIX ORDER FULFILLMENT
Service and cost are the two main elements that play all the time in the Order
Fulfillment processes

READY-MIX ORDER FULFILLMENT
Main Challenges
 The Order Fulfillment process of ready-mix
concrete is recognized as one of the most
challenging problems in manufacturing and
logistics.
 Concrete is a perishable product with a usable time
of less than 2 hours
 The majority of the orders require time-
synchronized, staggered deployment of several
trucks.
 Concrete must be poured in a continuous fashion
Every 2-5 minutes, dispatchers have to evaluate
among many alternatives to decide which individual
truck to assign to a delivery and then determining
which plant to direct a truck to after delivery
completion. Added to that, changes operative
conditions and orders occur all the time:
 Unexpected delays in traffic or at customer sites
 High level of cancellation and modifications subject
to weather conditions
 Variable transit times depending on the hours of
the day
 Variable order amounts (bonus load)
 Mechanical failures of trucks and plants

Transmixers
• A transmixer is a vehicle similar to a truck which was designed especially for transporting
the fresh concrete to the place where it will be used without any decomposition in the
characteristics of the concrete.
• Ready mixed concrete is a construction material which must be consumed within
maximum two hours after production.
• Therefore, transmixers are among the most important production tools of a ready mixed
concrete plant. Transmixers may have various carrying capacities of 4, 6, 8 and even 12
cubic meters.

READY MIX CONCRETE INDUSTRY INDIA:
 40 cities currently are using it for several projects
 Specifications by municipal corporations, public works and other Govt.
bodies will play a big role in growth in the segment.
 Major players in India:
 RDC Concrete
 ACC Concrete Ltd
 Larsen & Toubro
 Madras Cements
 Grasim

BASIS OF SUPPLY
 quality and in the quantity in accordance with the requirements agreed
with the purchaser or has agent
 All concrete will be supplied and invoiced in terms of cubic meters (full or
part) of compacted fresh concrete.
 All proportioning is to be carried out by mass except water and admixture,
by volume.

TRANSPORT OF CONCRETE
General
• Ready-mixed concrete shall be transported from the mixer to the point of
placing as rapidly as possible
• Practicable by methods that will maintain the required workability and will
prevent segregation, loss of any constituents or ingress of foreign matter
or water
• Concrete shall be transported in a truck-mixer unless the purchaser
agrees to the use of non-agitating vehicles

TIME IN TRANSPORT
 discharge within 2 hr of the time Gf loading
 The time of loading shall start from adding the mixing water to the dry mix
of cement and aggregate or of adding the cement to the wet aggregate
whichever is applicable.
 Ready-mixed concrete plant shall have test facilities at its premises

INFORMATION TO BE SUPPLIED BY THE
PURCHASER
• The purchaser shall provide to the producer the details of the concrete mix or mixes
required by him and all pertinent information on the use of the concrete and the specified
requirements.
• Prior to supply taking place, it is recommended that a meeting is held between the
purchaser and the producer.
• Its objective to clarify operational matters, such as notice to be given prior to delivery,
delivery rate, the name of the purchaser’s authorized representative who will coordinate
Deliveries, any requirements for additional services such as pumping, on site testing or
training, etc.

INFORMATION TO BE SUPPLIED BY THE
PRODUCER
• When requested, the producer shall provide the purchaser with the following information
before any concrete is supplied:
• Nature and source of each constituent material,
• Source of supply of cement, and
• Proposed proportions or quantity of each constituent/m3 of fresh concrete.
• Delivery Ticket
• Immediately before discharging the concrete at the point of delivery, the producer or his
representative shall provide the purchaser with a preprinted delivery ticket for each delivery of
concrete on which is printed, stamped or written the minimum information detailed in Annex G.
The delivery ticket will form the basis of invoicing.

DELIVERY TICKET INFORMATION
• The following information shall be included in the
delivery ticket to accompany the load to the
purchaser
• Name or number of the ready-mixed concrete
depot.
• Serial number of the ticket.
• Date.
• Truck number.
• Name of the Purchaser.
• Name and location of site.
• Grade or mix description of the concrete.
• Specified target workability.
• Minimum cement content (if specified).
• Type of cement and grade (if specified).
• Maximum fi-eewater-cement ratio (if specified).
• Nominal maximum size of aggregate.
• Generic type or name of any chemical and mineral
admixtures included.
• Quantity of concrete in m’.
• Time of loading.
• Signature of the plant operator.
• A statement

ORDER PROCESSING
• A competent person to interpret the specified requirements and relate these to mix
design criteria shall systematically review specification and orders supplied by the
purchaser.
• These shall be formally recorded together with any modification to the specification
resulting from subsequent agreed documentation to ensure that the plant operator is
given the correct instructions for batching and mixing.
• When mixes or materials are offered as alternatives to requested mixes or where there is
no specification supplied by the purchaser, orders whether received verbally or in writing,
shall be agreed with the purchaser and the fact recorded.
• Alternatives to the mix description or compliance requirements in the purchaser’s
specification shall be clearly identified in the quotation.

Ready mix concrete scm comp final

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Ready mix concrete scm comp final