This document provides a literature review on the effect of elevated temperatures on the properties of geopolymer concrete. It summarizes several research papers that studied how geopolymer concrete performs when subjected to temperatures ranging from 200°C to 1000°C. The key findings include:
1) Specimen size and aggregate size were identified as the most important factors affecting strength at high temperatures, with larger sizes performing better.
2) Thermal mismatch between the geopolymer matrix and aggregates causes strength loss at high temperatures above 600°C.
3) Incorporating ground granulated blast furnace slag (GGBFS) can improve mechanical properties but exacerbates damage at high temperatures compared to fly ash geopolym
Effect of Steel Fiber on Alkali activated Fly Ash ConcreteIJERA Editor
Concrete is the world’s most important Construction material so the demand of cement is increases. The
production of cement is highly energy intensive & the production on one ton of cement liberates about one ton
of CO2 to atmosphere. The contribution of cement industry to the greenhouse gas emission is estimated to be
about 70% of the total green gas emission. Also it consumes large amount of natural resources. Hence it is
essential to find alternative to cement. Geopolymer concrete is an innovative material in which the binder is
produced but the reaction of an alkaline liquid with a source material that is rich in silica alumina.
The present work deals with the result of the experimental investigation carried out on geopolymer concrete
using steel fiber. The study analyses the effect of steel on compressive strength. Geopolymer concrete mixes
were prepared using low calcium fly ash & activated by alkaline solution. (NaOH & Na2SiO3) with alkaline
liquid to fly ash ratio of 0.35 Alkaline solution. Used for present study combination of sodium hydroxide &
sodium silicate with ratio 2.5. The mix was designed for molarity of 16M & grade chosen for investigation was
M30. Hooked end steel fiber . All tests were conducted according to IS-code procedure. The result for each
variation are tabulated & discussed in details & some important conclusions are made.
Effect of Steel Fiber on Alkali activated Fly Ash ConcreteIJERA Editor
Concrete is the world’s most important Construction material so the demand of cement is increases. The
production of cement is highly energy intensive & the production on one ton of cement liberates about one ton
of CO2 to atmosphere. The contribution of cement industry to the greenhouse gas emission is estimated to be
about 70% of the total green gas emission. Also it consumes large amount of natural resources. Hence it is
essential to find alternative to cement. Geopolymer concrete is an innovative material in which the binder is
produced but the reaction of an alkaline liquid with a source material that is rich in silica alumina.
The present work deals with the result of the experimental investigation carried out on geopolymer concrete
using steel fiber. The study analyses the effect of steel on compressive strength. Geopolymer concrete mixes
were prepared using low calcium fly ash & activated by alkaline solution. (NaOH & Na2SiO3) with alkaline
liquid to fly ash ratio of 0.35 Alkaline solution. Used for present study combination of sodium hydroxide &
sodium silicate with ratio 2.5. The mix was designed for molarity of 16M & grade chosen for investigation was
M30. Hooked end steel fiber . All tests were conducted according to IS-code procedure. The result for each
variation are tabulated & discussed in details & some important conclusions are made.
Effect Of Curing Temperature And Curing Hours On The Properties Of Geo-Polyme...ijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
A Review On Development Of Flyash Based High Strength Geopolymer Concretecedmmantc5411
Geopolymer concrete is the latest development in the field of concrete technology and it is still
developing. Geopolymers are inorganic, stable, hard and non-inflammable binder. The application of
geopolymer binder are in fire resistance fiber composite, sealant industry, tooling aeronautics SPF aluminium,
foundry equipment’s, radioactive toxic waste, ceramic, bricks and other precast concrete. The current review is
aims to put forward the development in geopolymer concrete for the production high strength geopolymer
concrete having strength more than 90MPa. The development of high strength concrete is aimed to reduce
structural member sizes and for economical construction in case of long span bridges and tall buildings. Also
the use flyash in concrete to reduce green gas house emission into the atmosphere by reducing cement usage
Performance of Concrete at Elevated Temperatures: Utilizing A Blended Ordinar...IOSR Journals
This study aimed at investigating the effect of subjecting concrete, produced with cement being
partially replaced with saw dust ash (SDA) to elevated temperatures. The performance of the test concrete cubes
was done by exposing them to elevated temperatures of 200oC, 400oC, 600oC and 800oC, and allowed to cool
down to room temperature before testing for their properties. Both the physical and thermal properties of the
concrete cubes were determined. The concrete produced by blending cement with 10% SDA with an average
percentage loss of 23.04% retained more of its compressive strength when exposed to the different
temperatures, than concrete produced using only OPC, which has an average percentage loss of 29.11%. It is
also found that, at an elevated temperature of 800oC, concrete fail totally in flexure due to the effect of high
heat on binding elements. The flexural strength of both the control concrete (at 0% OPC replacement) and
OPC/SDA blended concrete (at 10% OPC replacement) decreased as the temperature is increased. The
replacement of OPC by 10% SDA increased the thermal shock resistance of the concrete by 11 cycles than the
0% OPC concrete at the same temperature. The concrete produced with OPC has better thermal conductivity
than the concrete produced by blending OPC with SDA, as a result, the dislodgement of the concrete edges is
relatively lower in the SDA blended cement concrete than in the OPC concrete. The result shows that, blending
OPC with SDA in concrete performed better at elevated temperatures than concrete produced with only OPC.
Therefore, the replacement of OPC with 10% SDA can be applied as a fire resisting bonding material in
concrete.
Effect Of Curing Temperature And Curing Hours On The Properties Of Geo-Polyme...ijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
A Review On Development Of Flyash Based High Strength Geopolymer Concretecedmmantc5411
Geopolymer concrete is the latest development in the field of concrete technology and it is still
developing. Geopolymers are inorganic, stable, hard and non-inflammable binder. The application of
geopolymer binder are in fire resistance fiber composite, sealant industry, tooling aeronautics SPF aluminium,
foundry equipment’s, radioactive toxic waste, ceramic, bricks and other precast concrete. The current review is
aims to put forward the development in geopolymer concrete for the production high strength geopolymer
concrete having strength more than 90MPa. The development of high strength concrete is aimed to reduce
structural member sizes and for economical construction in case of long span bridges and tall buildings. Also
the use flyash in concrete to reduce green gas house emission into the atmosphere by reducing cement usage
Performance of Concrete at Elevated Temperatures: Utilizing A Blended Ordinar...IOSR Journals
This study aimed at investigating the effect of subjecting concrete, produced with cement being
partially replaced with saw dust ash (SDA) to elevated temperatures. The performance of the test concrete cubes
was done by exposing them to elevated temperatures of 200oC, 400oC, 600oC and 800oC, and allowed to cool
down to room temperature before testing for their properties. Both the physical and thermal properties of the
concrete cubes were determined. The concrete produced by blending cement with 10% SDA with an average
percentage loss of 23.04% retained more of its compressive strength when exposed to the different
temperatures, than concrete produced using only OPC, which has an average percentage loss of 29.11%. It is
also found that, at an elevated temperature of 800oC, concrete fail totally in flexure due to the effect of high
heat on binding elements. The flexural strength of both the control concrete (at 0% OPC replacement) and
OPC/SDA blended concrete (at 10% OPC replacement) decreased as the temperature is increased. The
replacement of OPC by 10% SDA increased the thermal shock resistance of the concrete by 11 cycles than the
0% OPC concrete at the same temperature. The concrete produced with OPC has better thermal conductivity
than the concrete produced by blending OPC with SDA, as a result, the dislodgement of the concrete edges is
relatively lower in the SDA blended cement concrete than in the OPC concrete. The result shows that, blending
OPC with SDA in concrete performed better at elevated temperatures than concrete produced with only OPC.
Therefore, the replacement of OPC with 10% SDA can be applied as a fire resisting bonding material in
concrete.
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/
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.
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
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.
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.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
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.
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.