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 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 Rheological Properties Of Self-Consolidating Concrete Incorporating Natural And Industrial Pozzolans

2021 ◽  
Author(s):  
Asaad Mousa
Keyword(s):  
Rheological Properties ◽  
Yield Stress ◽  
Silica Fume ◽  
High Performance ◽  
High Performance Concrete ◽  
Cost Effective ◽  
Sustainable Construction ◽  
Self Consolidating Concrete ◽  
Supplementary Cementing Materials ◽  
Passing Ability

Self-consolidation concrete (SCC) is the latest version of high performance concrete with excellent workability and high resistance to segregation and bleeding. The main objective of this project is to study the rheological properties of SCC incorporating natural and industrial pozzolans (silica fume and metakaolin, repectively) as supplementary cementing materials (SCMs). Use of such pozzolanic materials in the development of environmentally friendly and cost effective SCC can lead to sustainable construction. In this project eleven SCC mixtures are developed by incorporating different percentages of silica fume (SF) and metakaolin (MK) as replacement of cement. However, the water cement ratio of all SCC mixtures are optimized so that all mixtures satisfied the requirements of SCC in terms of fresh properties such as workability, stability, passing ability, bleeding and segregation resistance. This study particularly concentrates on evaluation of the rheological properties such as viscosity and yield stress of developed silica fume and metakaolin based SCC mixtures. The influence of SF and MK dosages on viscosity and yield stress of SCC mixtures are evaluated. Correlations among fresh and rheological properties are developed and critically reviewed to make recommendations.

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 Rheological Properties Of Self-Consolidating Concrete Incorporating Natural And Industrial Pozzolans

2021 ◽  
Author(s):  
Asaad Mousa
Keyword(s):  
Rheological Properties ◽  
Yield Stress ◽  
Silica Fume ◽  
High Performance ◽  
High Performance Concrete ◽  
Cost Effective ◽  
Sustainable Construction ◽  
Self Consolidating Concrete ◽  
Supplementary Cementing Materials ◽  
Passing Ability

Self-consolidation concrete (SCC) is the latest version of high performance concrete with excellent workability and high resistance to segregation and bleeding. The main objective of this project is to study the rheological properties of SCC incorporating natural and industrial pozzolans (silica fume and metakaolin, repectively) as supplementary cementing materials (SCMs). Use of such pozzolanic materials in the development of environmentally friendly and cost effective SCC can lead to sustainable construction. In this project eleven SCC mixtures are developed by incorporating different percentages of silica fume (SF) and metakaolin (MK) as replacement of cement. However, the water cement ratio of all SCC mixtures are optimized so that all mixtures satisfied the requirements of SCC in terms of fresh properties such as workability, stability, passing ability, bleeding and segregation resistance. This study particularly concentrates on evaluation of the rheological properties such as viscosity and yield stress of developed silica fume and metakaolin based SCC mixtures. The influence of SF and MK dosages on viscosity and yield stress of SCC mixtures are evaluated. Correlations among fresh and rheological properties are developed and critically reviewed to make recommendations.

Nanotechnology: The Emerging Field of Civil Engineering Particularly in Developing Countries

2014 ◽  
Vol 974 ◽  
pp. 329-334
Author(s):  
Tanvir Manzur ◽  
Ma Bashar Emon ◽  
Kabirul Islam
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Developing Countries ◽  
Construction Industry ◽  
Silica Fume ◽  
Cement Hydration ◽  
Civil Engineering ◽  
Alkali Silicate ◽  
The World ◽  
Research On Application

Nanotechnology has taken the world of science by a storm and construction industry is no exception. The most important aspect of construction industry that can be influenced by nanotechnology is cement and concrete. Recent research on application of carbon nanotubes (CNT), both single-walled and multi-walled, shows significant increase in mechanical properties of concrete. Other properties of concrete e.g. durability, permeability, cement hydration etc. can be conveniently influenced with the help of Alkali-Silicate Reaction (ASR) studies, nanoScale Silica Fume, integration of nanoParticles in cement-synthesis and a lot other methods. And as a matter of fact, the future of cement based construction industry seems to be shaped by nanotechnology as even developing countries like Bangladesh are coming forward now-a-days to harness the potential of this rapid growing field.

scholarly journals STUDY ON MECHANICAL PROPERTIES OF HIGH STRENGTH CONCRETE WITH SILICA FUME, FLYASH AND STEEL FIBER

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Atul Ranjan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fly Ash ◽  
Construction Industry ◽  
Silica Fume ◽  
Steel Fiber ◽  
High Strength ◽  
Steel Fibers ◽  
Split Tensile Strength ◽  
To Come

In this growing world there has always been a strong competition in the market amongst industries in term of economy, profits, shares etc. one such industry is construction industry where concrete is the key building substance which is in limelight. Since past, we have seen much advancement in concrete because of the research which is in progress on concrete to come out with a product which should be economical and strong enough to resist all kind of loads. In this thesis, fly ash and silica fume are used as a replacement for cement along with steel fibers by volume of concrete. Here, fly ash is replaced by 0%, 15%, 30% and silica fume is replaced by 0%, 6%, 12% and 18% for cement. Initially, a set of concrete specimens were casted with 0%, 15%, 30% fly ash and 0%, 6%, 12% and 18% silica fume with 0% addition of steel fibers and tested for compressive, flexural and split tensile strength. Secondly, another set of concrete specimens were casted with 0%, 15%, 30% fly ash and 0%, 6%, 12% and 18% silica fume with 0.5% addition of steel fibers and tested for the same. Similarly, another set of samples were casted 0%, 15%, 30% fly ash and 0%, 6%, 12% and 18% silica fume with 1% addition of steel fibers and tested to determine the mechanical properties of concrete. And it was observed that maximum compressive, flexural and split tensile strength was attained at 15% fly ash and 12% silica fume with 1% steel fiber

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

Effect of waste electronic plastic and silica fume on mechanical properties and thermal performance of concrete

2021 ◽  
Vol 285 ◽  
pp. 122952
Author(s):  
Khawar Ali ◽  
Muhammad Irshad Qureshi ◽  
Shahzad Saleem ◽  
Sibghat Ullah Khan
Keyword(s):  
Mechanical Properties ◽  
Silica Fume ◽  
Thermal Performance

scholarly journals Industrial legislation in Australia, 2020

2021 ◽  
pp. 002218562110082
Author(s):  
Eugene Schofield-Georgeson
Keyword(s):  
Social Welfare ◽  
Labour Market ◽  
Federal Government ◽  
Construction Industry ◽  
Workers Compensation ◽  
State Governments ◽  
The Past ◽  
Wage Theft ◽  
Economic Stimulus ◽  
Liberal Government

In 2020, the Federal Morrison Liberal Government scrambled to respond to the effects of the international coronavirus pandemic on the Australian labour market in two key ways. First, through largescale social welfare and economic stimulus (the ‘JobKeeper’ scheme) and second, through significant proposed reform to employment laws as part of a pandemic recovery package (the ‘Omnibus Bill’). Where the first measure was administered by employers, the second was largely designed to suspend and/or redefine labour protections in the interests of employers. In this respect, the message from the Federal Government was clear: that the costs of pandemic recovery should be borne by workers at the discretion of employers. State Labor Governments, by contrast, enacted a range of industrial protections. These included the first Australia ‘wage theft’ or underpayment frameworks on behalf of both employees and contractors in the construction industry. On-trend with state industrial legislation over the past 4 years, these state governments continued to introduce industrial manslaughter offences, increased access to workers’ compensation, labour hire licensing schemes and portable long service leave.

Sign in / Sign up

Export Citation Format

Share Document