The document provides information on ready-mix concrete (RMC), including its introduction and history in India, advantages, disadvantages, mixing processes, and uses of admixtures. Some key points:
- RMC was first used in India in the 1950s for dam construction projects.
- It involves weighing ingredients at a central plant and delivering fresh concrete to sites within the requisite time. This provides consistency and reduces waste.
- However, longer transport times can be an issue, and access for trucks must be considered. Concrete must also be placed within 2 hours of mixing.
- Mixing can be done in transit, at the central plant, or on-site for more remote locations. Proper mixing is important
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 (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.
Admixtures are added in concrete to improve the quality of concrete.
Fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), Metakaolin (MK), and rice husk ash (RHA)
Possess certain characteristics through which they influence the properties of concrete differently.
Effect of mineral admixtures on the properties of fresh concrete is very important as these properties may affect the durability and mechanical properties of concrete.
Quality Control in Concrete and Durability factors : An overviewbybyRAJESH PRASAD,IRSE, CPM/M, RVNL. KOLKATA. An interesting and informative presentation....
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.
ready mix concrete supplier
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ready mix concrete near me
local ready mix concrete companies
ready mix concrete company near me
ready mix concrete prices
ready mix concrete calculator
ready mix companies near me
how is ready mix concrete manufactured
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.
Admixtures are added in concrete to improve the quality of concrete.
Fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), Metakaolin (MK), and rice husk ash (RHA)
Possess certain characteristics through which they influence the properties of concrete differently.
Effect of mineral admixtures on the properties of fresh concrete is very important as these properties may affect the durability and mechanical properties of concrete.
Quality Control in Concrete and Durability factors : An overviewbybyRAJESH PRASAD,IRSE, CPM/M, RVNL. KOLKATA. An interesting and informative presentation....
Use of chemical admixtures and mineral additives in various kinds of high performance and high strength concrete is essential. I have explained how it works.
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.
This presentation gives a brief introduction on FRC's history, definition and why is it used. Types of FRC's and it's applications is explained in detail in later stages.Also, it covers various properties that affects FRC and a Case study in end.
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.
What are the Different Types of Ready Mix ConcreteArkihive
Concrete is a mixture of Portland cement, water, and coarse & fine aggregates mixed at the site. RMC as opposed to site concrete is mixed in a central batching or a mixing plant which is then transported in a truck-mixer and supplied in fresh condition to the site. RMC has the same composition & proportion as traditional concrete, since it is manufactured in a plant it has the added advantage of mixing concrete in precise proportions. This improves the concrete mix and standardizes the quality. This concrete mix is supplied in terms of cubic meters.
Useful for Second year Civil Engineering Students of Savitribai Phule Pune university, Pune (University of Pune)
This PPT shows Concrete Equipments used for concreting and some special concretes. Useful for Civil Engineering Students.
Few more PPTs and Videos are available at my blog tusharhsonawane.wordpress.com
Concrete Batching Plants are used for manufacturing high-quality concrete in a variety of construction applications, like buildings, roads, bridges, airports, and many others, and integrates materials storing, weighing, and mixing processes.
It is a machine that combines various ingredients like aggregates, sand, water, cement, and additives. These components are first weighed individually and then combined to prepared ready-mix concrete
Mixing and handling fresh concrete
Lecturer: Rafah Rasheed Abdul Majeed.
ERBIL PLOYTECHNIC UNIVERSITY
ERBIL TECHNICAL ENGINEERING COLLEGE
#Concrete Technology
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.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
2. • 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.
3. • 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
4. • 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.
• 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.
5. • 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
6. • 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.
• 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
7. • 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.
8. • 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.
9. • 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. Transit Mixed (or "truck-mixed") Concrete
• 2. Shrink Mixed Concrete
• 3. Central Mixed Concrete
10. • TRANSIT MIXING:-
• It is delivered to the worksite, often in transit mixers capable of mixing
the ingredients of the concrete just before the delivery of 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.
• CENTRALLY MIX:-
• 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.
11. • Transit Mixed (or "truck-mixed") Concrete:-
• In transit-mixed concrete, also called truck mixed or dry-
batched, all of the raw ingredients are charged directly in the
truck mixer. Most or all water is usually batched at the plant.
• Concrete mixed at the job site:- While traveling to the job
site the drum is turned at agitating speed (slow speed). After
arriving at the job site, the concrete is completely mixed.
• Concrete mixed in the yard:- The drum is turned at high
speed or 12-15 rpm for 50 revolutions. This allows a quick
check of the batch. The concrete is then agitated slowly while
driving to the job site.
• Concrete mixed in transit:- The drum is turned at medium
speed or about 8 rpm for 70 revolutions while driving to the
job site. The drum is then slowed to agitating speed.
12. • Time in Transport:
• The general requirement is that concrete shall be
discharged from the truck mixer within 2 hours of the
• time of loading. However, longer period may be
permitted if retarding admixtures are used or in cool
• humid weather or when chilled concrete is produced
SAMPLING AND TESTING OF READY-
MIXED CONCRETE (As per IS 4926-
2003):
For the assessment of compliance of ready-mixed concrete, the point and the
time of sampling shall be
at the discharge from the producer’s delivery vehicle or from the mixer to the
site or when delivered
into the purchaser’s vehicle.
13.
14. Volumetric concrete mixer
• As an alternative to ready-mix concrete, volumetric
mobile mixers may be used to provide metered
concrete services. The volumetric mobile mixer is a
truck that contains concrete ingredient materials and
water to be mixed on the truck at the job site to make
and deliver concrete according to the amount needed.
The on-truck mixing at the job site eliminates the
problems of ready-mix concrete such as delays that
can cause the pre-mixed concrete to become
unusable. This is a hybrid approach between ready-
mix concrete and traditional on-site mixing.[3]
15. • A volumetric concrete mixer (also known as volumetric mobile
mixer and metered concrete truck) is a truck that contains
concrete ingredient materials and water to be mixed on the
truck at the job site to make and deliver concrete according to
the amount needed.[1]
• The mixer is a mixing device that measures the raw materials
using volume rather than weight. The volumetric mixer blends
the concrete mixture using an auger or a paddle or a drum
device to mix the ingredients with water. The volumetric
mixing process starts with a batch metering system that
allows the volume of raw materials to be measured prior to
entering the mixing chamber. This process can be as simple
as using a measured bucket, to highly sophisticated and
computerized batch plants that feed the correct volume.[2]
16. • Standard ready-mix concrete vs. site-mix concrete
• A 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.
17.
18. • Table 1 Assumed Standard Deviation
• Grade of Concrete Assumed Standard
Deviation N/sq.mm
• M 10 3.5
• M 15
• M 20 4.0
• M 25
• M 30 5.0
• M 35
• M 40
• M 45
• M 50
19. • 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.
• Air-entraining admixtures (mainly used in concrete exposed to freezing
and thawing cycles)
• Water-reducing admixtures, plasticizers (reduce the dosage of water
while maintaining the workability)
• Retarding admixtures (mainly used in hot weather to retard the reaction
of hydration)
• Accelerating admixtures (mainly used in cold weather to accelerate the
reaction of hydration)
• Super plasticizer or high range water-reducer (significantly reduce the
dosage of water while maintaining the workability)
• Miscellaneous admixtures such as corrosion inhibiting, shrinkage
reducing, coloring, pumping etc.