A POWERPOINT PRESENTAION ON READY-MIX CONCRETE • 1. A POWERPOINT PRESENTAION ON READY-MIX CONCRETE • • RMC IN INDIA: In India RMC was first initially was used in 1950 during the construction sites of Dams like Bhakra Nangal, Koyna. At the construction the transportation of concrete is done by either manually or mechanically using ropeways & buckets or conveyor systems. • • General introduction: • Ready Mix Concrete (RMC) is a specialized material in which the cement aggregates and other ingredients are weigh-batched at • a plant in a central mixer or truck mixer, before delivery to the construction site in a condition ready for placing by the builder.

Thus, `fresh' concrete is manufactured in a plant away from the construction site and transported within the requisite journey time. The RMC supplier provides two services, firstly one of processing the materials for making fresh concrete and secondly, of transporting a product within a short time • • ADVANTAGES • A centralized concrete batching plant can serve a wide area. • The plants are located in areas zoned for industrial use, and yet the delivery trucks can service residential districts or inner cities. • Better quality concrete is produced. • Elimination of storage space for basic materials at site.

Hierarchy Process Ashish H. Total cement production. Ready Mixed Concrete (RMC). Framework for Ready Mixed Concrete selection criteria QC QM. A very precise manufacturing process. A ready-mix concrete plant consists of silos that contain cement, sand.

• Elimination of hiring of plant and machinery. • Wastage of basic materials is avoided. • Labors associated with production of concrete is eliminated. • Time required is greatly reduced. • Noise and dust pollution at site is reduced.

• • ADVANTAGE OF RMC • RMC is preferred to on-site concrete mixing because of the precision of the mixture and reduced worksite confusion. It facilitates speedy construction through programmed delivery at site and mechanized operation with consequent economy. It also decreases labor, site supervising cost and project time, resulting in savings.

Proper control and economy in use of raw material results in saving of natural resources. It assures consistent quality through accurate computerized control • • DISADVANTAGES:- • The materials are batched at a central plant, and the mixing begins at that plant, so the traveling time from the plant to site is critical over longer distances. Star Jalsha Bengali Tv Serial. • Access roads, and site access have to be able to carry the weight of the truck and load concrete is approx 2.5tonne per comm. • concrete’s limited time span between mixing and going-off means that ready-mix should be placed within 2hours of batching at the plant • • Disadvantages of ready-mix concrete:- • The materials are batched at a central plant, and the mixing begins at that plant, so the traveling time from the plant to the site is critical over longer distances. Some sites are just too far away, though this is usually a commercial rather than a technical issue. • Generation of additional road traffic.

Furthermore, access roads and site access have to be able to carry the greater weight of the ready- mix truck plus load. (Green concrete is approx. 2.5 tone per m³.) This problem can be overcome by utilizing so-called 'mini mix' companies which use smaller 4m³ capacity mixers able to reach more-restricted sites. • Concrete's limited time span between mixing and curing means that ready-mix should be placed within 210 minutes of batching at the plant.[2] Modern admixtures can modify that time span precisely, however, so the amount and type of admixture added to the mix is very important. • • Standard ready-mix concrete vs.

Site- mix • concrete centralized concrete batching plant can serve a wide area. Site-mix trucks can serve an even larger area including remote locations that standard trucks can not. • The plants are located in areas zoned for industrial use, and yet the delivery trucks can service residential districts or inner cities. Site-mix trucks have the same capabilities. • Better quality concrete is produced. Site mix can produce higher compression strength with less water than standard batching methods. • • MIXING PROCESS: • Thorough mixing of the materials is essential for the production of uniform concrete.

The mixing should ensure that the mass becomes homogeneous, uniform in color and consistency. There are three methods adopted for mixing Ready Mix Concrete. • Following are the three types of mixing process of RMC • 1.