Cement is manufactured by heating raw materials consisting of lime, silica, alumina, and iron oxide in a kiln. These oxides form complex compounds including tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium aluminoferrite. The proportions of these compounds influence cement properties and are calculated using Bogue's equations. Gypsum is added during grinding to control the hydration of tricalcium aluminate. The chemical composition and compounds present determine cement properties such as setting time, strength development, and resistance to cracking from expansion.
Behaviour of fresh and hardened concretekavithamegha
This PPT discusses the structure and properties of concrete making materials. This is followed by hydration of cement, porosity of cement pastes and a study of selected topics regarding fresh and hardened concrete behaviour.
1. To understand the different complex compounds in cement.
2. Study the behavior of concrete with the fundamental interactions between ingredients
3. Fundamental understanding of the mechanism governing concrete performance.
4. Demonstrating the porosity of cement paste and elastic modulus.
5. Dramatize the rheology of concrete in terms of Bingham’s parameter.
Infomatica, as it stands today, is a manifestation of our values, toil, and dedication towards imparting knowledge to the pupils of the society. Visit us: http://www.infomaticaacademy.com/
This presentation covers the chemical constituents of Portland cement (PC) and the effects and properties of each of the main and minor compounds that make up the (PC). Their typical ranges in PC and in various types of PC. (edited)
Behaviour of fresh and hardened concretekavithamegha
This PPT discusses the structure and properties of concrete making materials. This is followed by hydration of cement, porosity of cement pastes and a study of selected topics regarding fresh and hardened concrete behaviour.
1. To understand the different complex compounds in cement.
2. Study the behavior of concrete with the fundamental interactions between ingredients
3. Fundamental understanding of the mechanism governing concrete performance.
4. Demonstrating the porosity of cement paste and elastic modulus.
5. Dramatize the rheology of concrete in terms of Bingham’s parameter.
Infomatica, as it stands today, is a manifestation of our values, toil, and dedication towards imparting knowledge to the pupils of the society. Visit us: http://www.infomaticaacademy.com/
This presentation covers the chemical constituents of Portland cement (PC) and the effects and properties of each of the main and minor compounds that make up the (PC). Their typical ranges in PC and in various types of PC. (edited)
Concrete Construction: Batching of mixes; casting process, compaction and curing;
requirement of mix design and casting of test cubes – removing cubes from moulds and
curing for strength tests; bar-bending equipments and preparation of reinforcement for
R C C works
It consists of required concrete ingredients such as Cement, Fine Aggregate, coarse aggregate and water. Steps to reduce carbon footprint,Hydration of cement and M-sand introduction.
Introduction- Classification of cements - Portland Cement
Raw materials of Portland cement - Cement Manufacturing Process - Flow chart of Portland Cement manufacturing process - Cement Manufacturing Video - Mixing and Crushing
Dry Process - Wet Process - Burning Process - View of complete setup - Rotary Klin zones - Chemical Reactions -
Grinding and Packaging - Setting and hardening - Flow chart
Sequence - Chemical Reactions - Special Cement -
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
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.
Concrete Construction: Batching of mixes; casting process, compaction and curing;
requirement of mix design and casting of test cubes – removing cubes from moulds and
curing for strength tests; bar-bending equipments and preparation of reinforcement for
R C C works
It consists of required concrete ingredients such as Cement, Fine Aggregate, coarse aggregate and water. Steps to reduce carbon footprint,Hydration of cement and M-sand introduction.
Introduction- Classification of cements - Portland Cement
Raw materials of Portland cement - Cement Manufacturing Process - Flow chart of Portland Cement manufacturing process - Cement Manufacturing Video - Mixing and Crushing
Dry Process - Wet Process - Burning Process - View of complete setup - Rotary Klin zones - Chemical Reactions -
Grinding and Packaging - Setting and hardening - Flow chart
Sequence - Chemical Reactions - Special Cement -
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
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.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
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.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
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.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
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/
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Halogenation process of chemical process industries
chemical composition of cement.pdf
1. 1
Chemical Composition of Cement
The raw materials used for the manufacture of cement consist mainly of lime, silica, alumina
and iron oxide. These oxides interact with one another in the kiln at high temperature to form
more complex compounds. The relative proportions of these oxide compositions are responsible
for influencing the various properties of cement; in addition to rate of cooling and fineness of
grinding. Table 1.4 shows the approximate oxide composition limits of ordinary Portland
cement.
Table 1.4. Approximate Oxide Composition Limits of Ordinary Portland Cement
Oxide Per cent content
CaO 60–67
SiO2 17–25
Al2O3 3.0–8.0
Fe2O3 0.5–6.0
MgO 0.1–4.0
Alkalies ( K2O, Na2O) 0.4–1.3
SO3 1.3–3.0
The identification of the major compounds of cement is largely based on Bogue’s equations
and hence it is called “Bogue’s Compounds”. The four compounds usually regarded as major
compounds are listed in table 1.5.
Table 1.5. Major compounds of cement
Name of Compound Formula Abbreviated Formula
Tricalcium silicate 3 CaO.SiO2 C3S
Dicalcium silicate 2 CaO.SiO2 C2S
Tricalcium aluminate 3 CaO.Al2O3 C3A
Tetracalcium aluminoferrite 4 CaO.Al2O3.Fe2O3 C4AF
It is to be noted that for simplicity’s sake abbreviated notations are used. C stands for CaO, S
stands for SiO2, A for Al2O3, F for Fe2O3 and H for H2O. The equations suggested by Bogue for
calculating the percentages of major compounds are given below.
C3S = 4.07 (CaO) – 7.60 (SiO2) – 6.72 (Al2O3) – 1.43 (Fe2O3) – 2.85 (SO3)
C2S = 2.87 (SiO2) – 0.754 (3CaO.SiO2)
C3A = 2.65 (Al2O3) – 1.69 (Fe2O3)
2. 2
C4AF= 3.04 (Fe2O3)
In addition to the four major compounds, there are many minor compounds formed in the kiln.
Two of the minor oxides namely K2O and Na2O referred to as alkalis in cement are of some
importance and Expressed in terms of Na2O. These alkalis basically react with active silica in
aggregate and produce what is called alkali-silica gel of unlimited swelling type under
favourable conditions of moisture and temperature in voids and cracks and further it causes
disruption and pattern cracking.
Tricalcium silicate and dicalcium silicate are the most important compounds responsible for
strength. Together they constitute 70 to 80 per cent of cement. The average C3S content in
modern cement is about 45 per cent and that of C2S is about 25 per cent.
The calculated quantity of the compounds in cement varies greatly even for a relatively small
change in the oxide composition of the raw materials. To manufacture a cement of stipulated
compound composition, it becomes absolutely necessary to closely control the oxide
composition of the raw materials.
SO3 also appear in cement analysis which comes from adding gypsum (4-6) % during clinker
gridding. The Iraqi and British specification for normal high rapid Portland cement pointed that
SO3 content must be between ( 3-2.5 )% according to type of cement and C3A content.
The percentage of MgO in cement which is come from Magnesia compounds in raw material.
is about ( 4-1)% and 5% as maximum range to control expansion from hydration of this oxide
in hard concrete.
An increase in lime CaO content beyond a certain value makes it difficult to combine with
other compounds and free lime will exist in the clinker which causes unsoundness in cement.
Insoluble residue is that part of the Cement non-soluble in hydrochloric acid HCl and arise
mainly from non active silica to form cement compounds dissolved in this acid therefore it
express the completeness of the chemical reactions inside the rotary kiln.
Loss on Ignition
Loss on ignition is calculated by heating up a cement sample to 900 – 1000°C until a constant
weight is obtained. The weight loss of the sample due to heating is then determined. A high loss
on ignition can indicate prehydration and carbonation, which may be caused by improper and
prolonged storage. Iraqi specification limits is 4% as maximum for normal and rapid hardening
Portland cement.
3. 3
Setting and Hardening of Cement
Setting Process: The process of losing plasticity with time and becoming dense, which is
formed by mixing the cement and water. It happened in two stage initial setting and final
setting.
Hardening Process: The process of forming hardening cement paste, which loses plasticity and
its strength increases with time.
Factors such as fineness and types of cement, blend of gypsum, age, water content, temperature
and humidity which influence setting and hardening of Portland cement.
Setting is important in concrete work to keep fresh concrete plastic for enough time which helps
the processes of transporting, casting, and compaction.
There are four stage occurs during setting of cement, First : when mixing cement with water, a
rapid heat evolution, lasting a few minutes, This heat evolution is probably due to the reaction
of cement compounds then, heat evolution ceases quickly. Second: this stage called “dormant
period” and last (1-4) hours. Also cement particles start to form initial layer of hydration
product. Bleeding and sedimentation appear in this stage. Third: Next heat evolution is on
account of dissolution of weak gel which formed first on surfaces of C3S crystals so water will
reach these surfaces and starts to form new gel. This stage last about 6 hours. Forth: in this stage
cement begin to harden and gain strength.
False and flash Setting
False setting is the rapid development of rigidity in freshly mixed Portland cement paste,
mortar, or concrete occurs after few minutes of mixing cement with water without the
generation of much heat. It can be controlled by re-mixing without additional water or strength
loss. Causes of false setting are:
1. Drying of gypsum: when gypsum (CaSO4.2H2O) gridding with hot clinker it loss 75% of
its water and formed (CaSO4.1/2 H2O) and if temperature of clinker increase gypsum loss
all water in its composition and formed CaSO4. When water add to cement CaSO4 react
causes rapid setting.
2. Bad storage: alkalis in cement react with carbon dioxide forming Alkali carbonate which
reacts with calcium hydroxide forming CaCO3 causing setting of cement paste.
3. Activate effective C3A exposed to humidity: during bad storage water adhere on cement
particles surface and during mixing these active surface combined rapidly with water
within minutes.
4. 4
Flash setting is a rapid development of rigidity in freshly mixed Portland – cement paste,
mortar, or concrete. Further mixing can’t dispel this rigidity, and a large amount of heat is
produced in the process. It happened Due to rapid reaction of aluminates – when insufficient
sulfate present so to prevent It A small amount of gypsum (CaSO4·2H2O) gridding with the
cement clinker retards the hydration reaction of tricalcium aluminate so that the calcium
silicates can set firstly.
Soundness of Cement
It refers to the ability of a hardened cement paste to retain its volume after setting without
delayed destructive expansion. This destructive expansion is caused by excessive amounts of
free lime (CaO), (SO3) or magnesia (MgO).
The hydrating speed of the over burnt CaO or MgO is slow, CaO or MgO begins to hydrate
after cement hardening and causes the hardened cement to expand and crack.
When added too much, gypsum continues to react with calcium aluminate hydrate to form
calcium sulfoaluminate hydrate, whose volume increase 1.5 times as big as gypsum and causes
the hardened cement paste to crack. At this time, sulfoaluminate hydrate is called cement
bacillus.