The document presents information on ready mix concrete (RMC). It discusses how RMC was developed in the early 1900s as a ready-to-use concrete mixture that could be transported to construction sites. The document outlines the materials, process, specifications, growth, applications, benefits and limitations of RMC. RMC provides consistent, high-quality concrete and reduces errors compared to on-site mixing due to highly mechanized production in a controlled plant environment.

1. PRESENTATION ON
“READY MIX CONCRETE”
PRESENTED BY:-
SAHIL KHAN
8655694348

2. INTRODUCTION:-
Ready-to-use material.
Predetermined mixture of cement, sand, aggregates, water &
suitable admixtures.
Introduced by Architect Jürgen Heinrich Magens.
He got his patent of RMC in Germany in 1903.
In 1907, he discovered that the available time for transportation
could be prolonged by vibrating it during transportation.

3.  First concrete mixed off site and delivered to a construction site was
effectively done in Baltimore, United States in 1913, just before the
First World War.
 The first concept of transit mixer was also born in 1926 in the United
States.
 In 1939, the first RMC plant was installed in United Kingdom.
 Between the years 1950 and 1980 considerable growth of RMC took
place in the United States.
 In India RMC was first initially used in 1950 on the construction sites
of Dams like Bhakra Nangal & Koyna.

4. The increasing availability of special transport vehicles, played a
positive role in the development of RMC industry.

5. MATERIALS REQUIRED IN RMC

7. PROCESS OF RMC:-

9. NEEDS TO BE SPECIFIED BY CUSTOMER
FOR RMC:-
Characteristic strength or grade (N/mm2)
Target workability or slump in mm required at site
Exposure conditions for durability requirements
Maximum water to cement ratio
 Minimum cement content
 Maximum aggregate size
 Type of cement
 Mineral admixture and its proportion (Kg/m3)

10. GROWTH OF RMC CONSUMPTION
COMPARED TO CEMENT PRODUCTION

11. APPLICATION OF RMC

12. MERITS OF RMC:-
Better quality concrete is produced.
Elimination of storage space for basic materials at site.
Elimination of Hiring plant and machinery.
Wastage of basic materials is avoided.
Labour associated with production of concrete is eliminated.
Time required is greatly reduced.
Noise and dust pollution at site is reduced.
No wastage at site.
Environment friendly.

13. DEMERITS OF RMC:-
Need huge initial investment.
Not affordable for small projects (small quantity of concrete)
Needs effective transportation system from R.M.C to site.
Traffic jam or failure of vehicle creates problem if proper dose of
admixture is not given.
Labours should be ready on site to cast the concrete in position to
vibrate it and compact it.
Concrete's limited time span between mixing and going-off means
that ready-mix should be placed within 90 minutes of batching at the
plant.

14. SCOPE OF RMC:-
Major concerting projects like dams, roads, bridges, tunnels, canals
etc.
For concreting in congested areas where storage of materials is not
possible.
Sites where intensity of traffic makes problems.
When supervisor and labour staff is less.
To reduce the time required for construction etc.
Huge industrial and residential projects.

15. SUMMARY:-
RMC is a modern technique of production of concrete in massive
quantities away from the actual site of placing.
The concrete quality produced in RMC plant is highly consistent with
low deviation order.
It provides a high degree of overall strength of hardened concrete
and the performance of the structure at a later date.
 RMC operations are highly mechanized and fully controlled through
electronic controls and hence reduce the probability of errors in
various operations.

16. REFERENCE:-
R. S. Aggrawal , “Concrete Technology” Published by S. Chand
IS 4926:2003, “The Indian Standard Specification”
www.google.com
www.wikipedia.org
www.rdcconcrete.com
www.scribd.com

17. Thank
You