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.
Ready-mix concrete (RMC) is a ready-to-use material, with predetermined mixture of Cement, sand, aggregates and water.
“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.”
Ready-mix concrete is concrete that is manufactured in a batch plant, according to a set engineered mix design.Ready-mix concrete is normally delivered in two ways. First is the barrel truck or in–transit mixers.This type of truck delivers concrete in a plastic state to the site.
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This PPT includes the details about Ready Mix Concrete (RMC) it's History, Application, Equipment required, Tests, Process, Materials Used, Merits, Demerits, Scope, Ready Mix Vs Site Mix, Consumption and Growth in India and it's Conclusion.
Ready-mix concrete (RMC) is a ready-to-use material, with predetermined mixture of Cement, sand, aggregates and water.
“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.”
Ready-mix concrete is concrete that is manufactured in a batch plant, according to a set engineered mix design.Ready-mix concrete is normally delivered in two ways. First is the barrel truck or in–transit mixers.This type of truck delivers concrete in a plastic state to the site.
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ready mix concrete columbus ohio
ready mix concrete near me
local ready mix concrete companies
ready mix concrete company near me
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ready mix concrete calculator
ready mix companies near me
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This PPT includes the details about Ready Mix Concrete (RMC) it's History, Application, Equipment required, Tests, Process, Materials Used, Merits, Demerits, Scope, Ready Mix Vs Site Mix, Consumption and Growth in India and it's Conclusion.
Aggregates: Review of types; sampling and testing; effects on properties of concrete, production of artificial aggregates.
Cements: Review of types of cements, chemical composition; properties and tests, chemical and physical process of hydration,Blended cements.Properties of fresh concrete - basics regarding fresh concrete –
mixing, workability, placement, consolidation, and curing,
segregation and bleeding
Chemical Admixtures: types and classification; actions and
interactions; usage; effects on properties of concrete
Mineral Admixtures: Flyash, ground granulated blast furnace slag,
metakaolin, rice-husk ash and
silica fume; chemical composition; physical characteristics; effects
on properties of concrete; advantages and disadvantages.
Proportioning of concrete mixtures: Factors considered in the design of mix . BIS Method, ACI method.,Properties of hardened concrete: Strength- compressive tensile
and flexure - Elastic properties - Modulus of elasticity - Creep-
factors affecting creep, effect of creep - shrinkage- factors affecting
shrinkage, plastic shrinkage, drying shrinkage, autogeneous
shrinkage, carbonation shrinkage ,Durability of concrete: Durability concept; factors affecting,
reinforcement corrosion; fire resistance; frost damage; sulfate
attack; alkali silica reaction; concrete in sea water, statistical quality
control, acceptance criteria as per BIS code.
Non-destructive testing of concrete: Surface Hardness, Ultrasonic,
Penetration resistance, Pull-out test, chemical testing for chloride
and carbonation- core cutting - measuring reinforcement cover
Special concretes - Lightweight concrete- description of various
types -High strength concrete - Self compacting concrete -Roller
compacted concrete – Ready mixed concrete – Fibre reinforced
concrete - polymer concrete
Special processes and technology for particular types of
structure - Sprayed concrete; underwater concrete, mass concrete;
slip form construction, Prefabrication technology
this slide about new Technics design sefl compecting concrete. it dose not required for compaction. its best to apply where compaction is not possible or critical.
In this Slides definition,types and manufacturing of Ready Mixed Concrete(RMC) has been discussed. This will be of great help to the students of civil engineering. They will find it more handy and easily understandable. This will also help to Teachers and professionals.
Aggregates: Review of types; sampling and testing; effects on properties of concrete, production of artificial aggregates.
Cements: Review of types of cements, chemical composition; properties and tests, chemical and physical process of hydration,Blended cements.Properties of fresh concrete - basics regarding fresh concrete –
mixing, workability, placement, consolidation, and curing,
segregation and bleeding
Chemical Admixtures: types and classification; actions and
interactions; usage; effects on properties of concrete
Mineral Admixtures: Flyash, ground granulated blast furnace slag,
metakaolin, rice-husk ash and
silica fume; chemical composition; physical characteristics; effects
on properties of concrete; advantages and disadvantages.
Proportioning of concrete mixtures: Factors considered in the design of mix . BIS Method, ACI method.,Properties of hardened concrete: Strength- compressive tensile
and flexure - Elastic properties - Modulus of elasticity - Creep-
factors affecting creep, effect of creep - shrinkage- factors affecting
shrinkage, plastic shrinkage, drying shrinkage, autogeneous
shrinkage, carbonation shrinkage ,Durability of concrete: Durability concept; factors affecting,
reinforcement corrosion; fire resistance; frost damage; sulfate
attack; alkali silica reaction; concrete in sea water, statistical quality
control, acceptance criteria as per BIS code.
Non-destructive testing of concrete: Surface Hardness, Ultrasonic,
Penetration resistance, Pull-out test, chemical testing for chloride
and carbonation- core cutting - measuring reinforcement cover
Special concretes - Lightweight concrete- description of various
types -High strength concrete - Self compacting concrete -Roller
compacted concrete – Ready mixed concrete – Fibre reinforced
concrete - polymer concrete
Special processes and technology for particular types of
structure - Sprayed concrete; underwater concrete, mass concrete;
slip form construction, Prefabrication technology
this slide about new Technics design sefl compecting concrete. it dose not required for compaction. its best to apply where compaction is not possible or critical.
In this Slides definition,types and manufacturing of Ready Mixed Concrete(RMC) has been discussed. This will be of great help to the students of civil engineering. They will find it more handy and easily understandable. This will also help to Teachers and professionals.
An Approach for Ready Mixed Concrete Selection for Construction Companies thr...A Makwana
One of the most useful method for selecting a project that is becoming more and more important is the Analytic Hierarchy Process (AHP). This method was developed by Dr. Thomas L. Saaty in 1970s as a tool to help with solving technical and managerial problems. Ready Mix Concrete (RMC) industry is continuously growing all over the world and India is not an exception to it. The pace of mechanization in the past was very slow due to the availability of cheap and abundant labor, lack of capital investment and the highly fragmented nature of the construction sector. The Ready Mixed Concrete in India on commercial basis started in 1994 and has achieved about 2% conversion from the site-mixed concrete by the year 2001. It is heartening that the acceptability of Ready mixed concrete is increasing though at a slow pace. The entry of foreign firms and major Indian cement producers in this field are likely to provide the necessary boost to this industry in the future. The growth prospect of Ready-mixed concrete is enormous, provided requisite support is given by the regulatory authorities, consumers and decision makers. At the present, the cost differential between Ready-mixed concrete and site mixed concrete is proving a major constraint in its growth. This problem will be resolved with the increasing awareness about the advantages of RMC by the end consumers.
Challenges and solution in Ready-Mixed Concrete(RMC) Industry/CONSTRUCTION/BU...VedantKotadiya
Challenges Facing the Concrete Industry
There are still a number of challenges facing the Concrete Industry. From a political and social viewpoint, improving the sustainability of concrete construction has to be the first challenge, not because concrete solutions are poor when compared with alternatives, but due to the volume needed for the modern economy. To get a fair comparison of alternatives, sustainability has to be at the level of the structure and include all three pillars of sustainability. Finding a system for combining the different indicators is essential if sustainability is to be assessed correctly and in a holistic and comparative way.
Ready Mix Concrete enables fast, good quality and reliable construction. Wastages and pilferages at sites are eliminated. Time taken in finishing the day concreting is reduced by 40 to 70 percent. Labour is reduced at the site. Ready Mix Concrete creates an ecosystem for site handling to become more convenient, eco-friendly and efficient. The cost comparisons lead to skewed results when the material cost of site concrete is directly compared with the delivered price of Ready Mix Concrete. However, after incorporating the economies achieved from the material, labor and time savings as well as a reduction in failures and corrective actions, it is easy to conclude that Ready Mix Concrete provides an economically viable alternative to all construction requirements. Apart from the short-term economics, buildings and infrastructure costs are substantially reduced when a superior and durable Ready Mix Concrete is used to reduce the overall lifecycle cost of construction. It should also be appreciated that the production of concrete needs to be done reliably and sustainably. This can be done when production facilities are equipped with a certified environment, health, and safety-related controls. The use of concrete from unorganized plants without QCI or BIS certification may appear cheaper but will be detrimental to the construction industry.
IntroductionFew things are more aggravating to produce on a worksi.pdfsinghanubhav1234
Introduction
Few things are more aggravating to produce on a worksite than concrete. Bags of cement, sand,
aggregate (gravel) and possibly other additives must be delivered to the construction area. A
supply of clean water is also necessary, along with a rented concrete mixing hopper. Even after
all the dusty and heavy ingredients have been loaded into the hopper, one small error in the
wet/dry ratio can render an entire batch of concrete unusable. One common solution to this
messy and time-consuming problem is “READY MIX CONCRETE”.
Ready-mix concrete (RMC) is a ready-to-use material, with predetermined mixture of cement,
sand, aggregates and water. RMC is a type of concrete manufactured in a factory according to a
set recipe or as per specifications of the customer, at a centrally located batching plant.
It is delivered to a worksite, often in truck mixers capable of mixing the ingredients of the
concrete en route or just before delivery of the batch. This results in a precise mixture, allowing
specialty concrete mixtures to be developed and implemented on construction sites. The second
option available is to mix the concrete at the batching plant and deliver the mixed concrete to the
site in an agitator truck, which keeps the mixed concrete in correct form.
In the case of the centrally mixed type, the drum carrying the concrete revolves slowly so as to
prevent the mixed concrete from \"segregation\" and prevent its stiffening due to initial set.
However, in the case of the truck-mixed concrete, the batched materials (sand, gravel and
cement) are carried and water is added just at the time of mixing. In this case the cement remains
in contact with the wet or moist material and this phase cannot exceed the permissible period,
which is normally 90 minutes.
The use of the RMC is facilitated through a truck-mounted \'boom placer\' that can pump the
product for ready use at multi-storied construction sites. A boom placer can pump the concrete
up 80 meters.
Objective -
Manufacturing process of ready mix concrete.
Procedure –
Materials required for RMC –
Admixture: A substance added to the basic concrete mixture to alter one or more properties of
the concrete; i.e. fibrous materials for reinforcing, water repellent treatments, and coloring
compounds.
Aggregate: Inert particles (i.e. gravel, sand, and stone) added to cement and water to form
concrete.
Cement: Dry powder that reacts chemically with water to bind the particles of aggregate,
forming concrete. Portland cement is typically used in concrete production.
Fly ash: Fly ash is a by-product from coal-fired electricity generating power plants. The coal
used in these power plants is mainly composed of combustible elements such as carbon,
hydrogen and oxygen (nitrogen and sulfur being minor elements), and non-combustible
impurities (10 to 40%) usually present in the form of clay, shale, quartz, feldspar and limestone.
As the coal travels through the high-temperature zone in the furnace, the combus.
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Student information management system project report ii.pdfKamal Acharya
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The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
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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.
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
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