3. Ready Mix Concrete - Definition
“Ready mix concrete is concrete whose
components are proportioned away from the
construction site for delivery to the construction
site by the truck in a ready-to-use-condition.”
4. History
In 1909, the residents of
Sneridan, Wyoming could
have witnessed the birth
of Ready Mix concrete
industry.
Prior to World War I,
concrete was produced in
stationery plant mixer
hauled to construction
sites in dumps trucks.
Transit Mixer in late 1950’s
5. Need for Ready Mix concrete
Requirement for higher grades of concrete
Correct accountability ingredients
Rapid development of infrastructure industry
Increased demand of concrete
Possibility of manufacture of desired grades
Mega project demands higher output
Timely supply of reliable concrete
6. Progressive growth of Ready mix concrete
in India
PHASE TIME PERIOD
IN YEARS
CEMENT
CONSUMPTION
IN %
VOLUME OF
R.M.C PER
YEAR
PHASE I 1992-2010 5-10% of cement
consumption
20 million cubic
meter/RMC/year
PHASE II 2020-2050 20-25% of cement
consumption
70 million cubic
meter/RMC/year
PHASE III 2050 Onwards 25-40% of cement
consumption
100 - 150 million
cubic
meter/RMC/year
7. Advantages Of Ready Mix Concrete
Quality assurance
Elimination of manual errors
Mass production of concrete possible
Water cement ratio maintained
Reduced material wastage
Labour cost saved
Design mix as per IS standards resulting in standard
deviation and improved characteristics.
8. Disadvantages Of Ready Mix Concrete
The materials are batched at a central plant, and
the mixing begins at that plant
Generation of additional road traffic; furthermore,
access roads, and site access have to be able to
carry the weight of the truck and load.
Concrete's limited time span between mixing and
going-off