scholarly journals Effect of GGBS, Metakaolin and Colloidal Nano-Silica on Mechanical Properties of Concrete

2022 ◽  
Vol 10 (1) ◽  
pp. 229-233
Author(s):  
Pranav Andraskar
Keyword(s):  
Mechanical Properties ◽  
Construction Industry ◽  
Greenhouse Effect ◽  
Co2 Emission ◽  
Cement Content ◽  
Nano Silica ◽  
Important Place ◽  
Cement Production ◽  
The Past ◽  
The World

Abstract: Concrete is the most common used material for construction &their design consumes almost the total cement production in the world. The use of large quantities of cement produces increasing CO2 emission and as a consequence the greenhouse effect. A method to reduce the cement content in the concrete mixes is the use of GGBS, Metakaolin Nano-Silica. This project aims to present the state of GGBS, Metakaolin& Nano-Silica's effect on the workability and mechanical properties of concrete and to find out the economy of the experiment as compared to convential concrete. Concrete has occupied an important place in construction industry in the past few decades and it is used widely in all types of constructions ranging from small buildings to large infrastructural dams or reservoirs.. Keywords: GGBFS, Mechanical Properties, Workability, Economy

scholarly journals Effects of Mechanical Properties of Concrete with Tio2 and Ggbs

2020 ◽  
Vol 9 (1) ◽  
pp. 1924-1927
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Building Material ◽  
Co2 Emission ◽  
Split Tensile Strength ◽  
The Past ◽  
Sustainable Environment ◽  
Optimum Content ◽  
Strength Tests ◽  
The World

Concrete is the abundant man made material in the world. The quantity of Co2 emission through the industrialized of OPC is almost one ton. The Co2 emission is approximately 7% of the worlds Co2 emission. In order to decrease the Co2 emission and create the sustainable environment we have to develop greener building material. In this the TiO2and GGBS is use in cement on mixing of concrete. In this TiO2 go about as a self cleaning material and the solid with expansion of TiO2 is 1% by mass of the concrete dependent on the past tasks are finished by the scientists and GGBS with 5%, 10% and 15% by mass of cement was prepared. In this research hardened tests are Compressive, Flexural, Split Tensile strength tests of concrete observations mixed with TiO2 and GGBS for optimum content was considered

Review Paper: Strength Performance of Eggshell as a Cement Replacement in Concrete

2021 ◽  
Vol 879 ◽  
pp. 22-33
Author(s):  
Adnan Zaidatul Syahida ◽  
Ariffin Nur Farhayu ◽  
Sharifah Maszura Syed Mohsin ◽  
Abdul Shukor Lim Nor Hasanah
Keyword(s):  
Mechanical Properties ◽  
Construction Industry ◽  
Carbon Dioxide Emissions ◽  
Egg Production ◽  
Paper Strength ◽  
Normal Concrete ◽  
Cement Production ◽  
Strength Performance ◽  
Cement Replacement ◽  
The Past

The numbers of Malaysian construction industry had been increasing in several years with the large construction building and infrastructures projects had been constructed. Therefore, these developments led to an increase of cement production. The production of cement will cause wider environmental implication such are air pollution, water pollution and soil pollution which are very dangerous for human health. This is due to the manufacturing of cement that release dust, toxic and carbon dioxide emissions, which is a significant contributor of greenhouse gases. To overcome this problem, several researches had been conducted for the past few decade to find a new waste material that have same mechanical properties which can replace cement content in construction. One of the most promising materials that shows great potential is eggshell as a cement replacement. It is reported that the global egg production will increase to about 90 million tons by 2030, therefore the waste of eggshell will be increased too. This paper study the mechanical properties of eggshell as a cement replacement in concrete. Several papers had been reviewed and the results are presented in order to shows the performance of eggshell in concrete. The result shows that the concrete with less than 15% replacement of eggshell produced higher compressive and tensile strength compared to normal concrete. Moreover, the flexural strength of concrete containing eggshell up to 20% replacement shows comparable results with normal concrete. From the results, by replacing cement with eggshell up to 15% show a good performance as well as can reduce the use of cement and reduce the eggshell wasted in landfill.

scholarly journals Fresh and Mechanical Properties of Self-Consolidating Concrete Incorporating Silica Fume and Metakaolin

2021 ◽  
Author(s):  
Syed Ahmed
Keyword(s):  
Mechanical Properties ◽  
Construction Industry ◽  
Silica Fume ◽  
High Flow ◽  
Self Consolidating Concrete ◽  
Supplementary Cementing Materials ◽  
The Past

Self-consolidating concrete (SCC) has been gaining greater interest over the past decades with its excellent offerings of efficiency, beauty, and savings. Due to its high flow ability, resistance to bleeding, and non-segregating properties, SCC holds tremendous potential for use in the construction industry. SCC requires no vibration and can fill capacities, including the ones with even the most congested reinforcements. Since SCC can be obtained by incorporating supplementary cementing materials (SCMs) such as silica fume and metakaolin. It is crucial to develop and test different SCC mixtures with different volumes of SCMs to evaluate fresh and mechanical properties. Although silica fume is used in the production of SCC, the use of metakaoline in SCC is new. In this project, eleven SCC mixtures having different volumes of silica fume and metakaolin are developed. In addition, the influence of the above mentioned pozzolans (silica fume and metakaolin) on the fresh and mechanical properties are analyzed. Recommendations on fresh and mechanical properties of silica fume and metakaoline based SCC mixtures are also provided.

scholarly journals Zero Energy Buildings: A Reached Target or a Starting Point?

2020 ◽  
Vol 10 (2) ◽  
pp. 512
Author(s):  
Enrico Fabrizio
Keyword(s):  
Construction Industry ◽  
Zero Energy ◽  
The Past ◽  
Starting Point ◽  
The World ◽  
Zero Energy Buildings

The debate about zero energy buildings (ZEBs) has been one of the main new drivers of innovation in the construction industry around the world in the past decade [...]

“Yakutia” by A. E. Stroganov. Artistic deconstruction of the mythological idyll

2021 ◽  
pp. 137-147
Author(s):  
I. V. Silantev ◽  
◽  
Yu. V. Shatin ◽  
Keyword(s):  
Individual Freedom ◽  
Important Place ◽  
Realistic Interpretation ◽  
Traditional Form ◽  
The Past ◽  
The World ◽  
The Universe ◽  
The Way

The problem of idyllic space occupies an important place in the mythopoetics of the Siberian text and can rightfully be considered as one of the dominant mythologemes in the culture and literature of the peoples of Siberia. The implementation of this mythologeme is often the mythopoetic topos of Belovodye. Belovodye attracted the attention of writers of the past two centuries, including Siberian authors A. E. Novoselov, M. Plotnikov, and others. The change in the paradigm of realistic writing with postmodern writing, which took place at the turn of the 20th – 21st centuries, allows taking a different look at the mythological idyll to dis- cover other ways of its artistic deconstruction. The play “Yakutia” by Altai playwright A. E. Stroganov is considered as an example of deconstruction of the idyllic myth of the postmodern era. Intended as an idyll of desolation, cold, and asceticism, finally, Yakutia mi-raculously turns into a country of joy, light and, warmth, i.e., it becomes the opposite of the idyll, more consistent with the traditional form of typification. In the context of postmodern-ism, an appeal to the idyll shows that it has the features opposite to the realistic interpretation. The idea of collective happiness is clearly replaced by the idea of individual freedom of a sin-gle person, his existence. At the same time, the main, archetypal features of the transformed world turn out to be very similar to the original prototype: the world of evil left by the heroes opens the way not for an idyll but for a new experience of comprehending the universe.

scholarly journals Modification of cement systems by carbon nanotubes

2019 ◽  
Author(s):  
Skripkiunas Gintautas
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Titanium Dioxide ◽  
Composite Materials ◽  
Construction Industry ◽  
Setting Time ◽  
Oxide Nanoparticles ◽  
Nano Silica ◽  
Hardened State ◽  
Aluminium Oxide Nanoparticles

The nanoparticles and nanostructures such as nano silica, nano metakaolin, titanium dioxide and aluminium oxide nanoparticles, graphite nanomaterials, carbon nanotubes are used for modification of composite materials in construction industry. The considerable attention of researchers is focused on the investigation of cement systems modified by carbon nanotubes (CNT). The present research describes the generalized data about modification of cement systems by CNT suspension in fresh and hardened state. The influence of carbon nanotubes on setting time of cement paste, rheological and mechanical properties of nanomodified cement systems are demonstrated in the present research.

scholarly journals The Sustainable Solution Green Building

2021 ◽  
pp. 435-438
Author(s):  
Aboli Mendhe ◽  
Ankit Ghode ◽  
Umesh Jibhakate ◽  
Ritik Chalurkar ◽  
Niraj Bhople ◽  
...  
Keyword(s):  
Climate Change ◽  
Sustainable Development ◽  
Global Warming ◽  
Construction Industry ◽  
21St Century ◽  
Green Building ◽  
Construction Technology ◽  
The Past ◽  
The World ◽  
The Impact

Since the 21st century, the idea of green constructing has gradually become popular again was launched in many countries, which has become a popular alternative to sustainable development construction industry. Over the past few decades, many scholars and experts have done more research on the green structure. Green construction technology is one of the world’s leading topics set to reduce the major impact of the construction industry on the environment, society and the economy. The world has an urgent need for sustainability and an intelligent development as the problem of pollution and global warming grows rapidly around the world. Major climate change has also been noted and experience globally due to the proliferation of Green House Gases (GHG's). The purpose of this paper is to focus on how sustainable constructing material can help reduce the impact of environmental degradation, and produce healthy buildings that are sustainable for the human being and for our environment.

scholarly journals Fresh and Mechanical Properties of Self-Consolidating Concrete Incorporating Silica Fume and Metakaolin

2021 ◽  
Author(s):  
Syed Ahmed
Keyword(s):  
Mechanical Properties ◽  
Construction Industry ◽  
Silica Fume ◽  
High Flow ◽  
Self Consolidating Concrete ◽  
Supplementary Cementing Materials ◽  
The Past

Self-consolidating concrete (SCC) has been gaining greater interest over the past decades with its excellent offerings of efficiency, beauty, and savings. Due to its high flow ability, resistance to bleeding, and non-segregating properties, SCC holds tremendous potential for use in the construction industry. SCC requires no vibration and can fill capacities, including the ones with even the most congested reinforcements. Since SCC can be obtained by incorporating supplementary cementing materials (SCMs) such as silica fume and metakaolin. It is crucial to develop and test different SCC mixtures with different volumes of SCMs to evaluate fresh and mechanical properties. Although silica fume is used in the production of SCC, the use of metakaoline in SCC is new. In this project, eleven SCC mixtures having different volumes of silica fume and metakaolin are developed. In addition, the influence of the above mentioned pozzolans (silica fume and metakaolin) on the fresh and mechanical properties are analyzed. Recommendations on fresh and mechanical properties of silica fume and metakaoline based SCC mixtures are also provided.

scholarly journals Influence of Different Nano Materials on Mechanical Properties of Plain Concrete

2019 ◽  
Vol 4 (6) ◽  
pp. 129-134
Author(s):  
Mohamad Farouk Abd-elmagied
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Iron Oxide ◽  
Cement Content ◽  
Plain Concrete ◽  
Nano Materials ◽  
Nano Silica ◽  
Concrete Compressive Strength ◽  
Concrete Mix ◽  
Different Types

This research aims to study the influences of three types of Nano materials on concrete compressive strength, considered Nano types were Nano-Iron Oxide Fe2O3 (NF), Nano-Manganese Oxide Mn2O3 (NM), and Nano-Silica SiO2 (NS). A constant concrete mix and water content were considered. The used percentages of different types of (NF, NM, and NS) that replaced by the cement content were (0.5, 1.0, 2.0, and 5.0%) of mixture weight (wt). The results demonstrated that the (NS) Nano type has better effect than other types on the concrete compressive strength.

Light Weight Rigid OCS in Elevated Section of Delhi MRTS

2020 ◽  
Author(s):  
Om Hari Pande ◽  
Ashok Tewari ◽  
Sanjeev Kumar
Keyword(s):  
Mechanical Properties ◽  
Detailed Analysis ◽  
Short Circuit ◽  
Light Weight ◽  
Contact Wire ◽  
The Past ◽  
The World ◽  
National Capital ◽  
Electrical Faults ◽  
The City

Abstract Delhi Metro is the first Metro in the world to provide 25 kV AC Rigid Overhead Conductor System (ROCS) in underground Tunnel. Most of the metros worldwide runs on 1500 V DC. The Elevated section of Delhi Metro is also provided with 25 kV AC Flexible OHE systems. The system is designed in accordance with EN-50119, 50122. MRTS system plays an important role in functioning of the city transport. In the national capital of India, the Delhi Metro has become lifeline of Delhi since it’s inauguration in December 2002. Even occasional disruption of services, not only creates inconvenience & chaos between commuters but also invites severe criticism from public & media. A number of failures in flexible OHE have caused disruption of metro services in the past few years. In elevated & at grade sections, DMRC is using conventional 25 kV AC flexible OHE where contact wire is suspended from a stranded messenger wire. Detailed analysis of the failure incidents indicated that catenaries’ parting and strands breakages due to short circuit contribute a significant portion i.e. 49% of total flexible OHE failures, While ROCS in underground stations is giving almost trouble-free services. Exploration of the possibilities of adopting Rigid OCS in elevated section shall help in reducing the breakdowns in 25kV traction as this will eliminate the component (i.e. Messenger wire) which is responsible for major failure. Also, mechanical properties of ROCS during electrical faults are far superior to that of flexible OHE.

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