Mechanical Properties of Recycled Tire Wires and Glass Fibers Reinforced Concrete
Moti Muleta,
Tesfaye Alemu
Issue:
Volume 4, Issue 1, June 2020
Pages:
1-10
Received:
6 November 2019
Accepted:
26 November 2019
Published:
14 April 2020
Abstract: Concrete is a versatile construction material with various uses. It is has poor tensile strength and good compressive strength mechanical properties. In past, an effort has been made to improve concrete mechanical properties by mixing with various foreign materials such as synthetic and natural fibers, steel wires and plastics. However, there is research gap in literature to study comparative use of recycled and new materials for improving concrete mechanical properties. This research work experimentally investigates use of new glass fibers and recycled tire fibers in 0.5%, 1% and 1.5% in weight mixes with concrete to study concrete mechanical properties performance gains such as compressive, flexural and split tensile strength properties. Experimental results indicated as compared to control plain concrete specimen, use of recycled steel fiber and glass fibers in concrete mix increased flexural property of concrete by 19.64% and 24.56% whereas split tensile strength of concrete is enhanced by 8.15% and 12.02%, respectively. Similarly, compressive strength of concrete is improved by 5.34% and 7.87% respectively. Also, optimum blend percentage of recycled tire fiber and glass fiber for enhanced performance gains in concrete mechanical properties is one percent. Finally, use of recycled steel fibers and glass fibers in concrete exhibited similar concrete mechanical property performance gains however, recycled steel fibers has 78% direct cost reduction as compared to glass fibers.
Abstract: Concrete is a versatile construction material with various uses. It is has poor tensile strength and good compressive strength mechanical properties. In past, an effort has been made to improve concrete mechanical properties by mixing with various foreign materials such as synthetic and natural fibers, steel wires and plastics. However, there is re...
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Water Industry Cyber Security Human Resources and Training Needs
Issue:
Volume 4, Issue 1, June 2020
Pages:
11-16
Received:
28 June 2020
Accepted:
15 July 2020
Published:
23 July 2020
Abstract: Cyber-attacks are a growing and persistent threat to water infrastructure, including drinking water and wastewater systems. Water infrastructure uses a number of technical control systems to manage and track infrastructure properties, including hardware and software, such as monitoring and data acquisition systems, process control systems, and other devices, such as programmable logic controllers, that control data gathering equipment and information technology. As these systems become more connected to corporate systems and the internet, security approaches are needed equally across both the control system and the corporate network infrastructure, as there are many potential entry points for cyber attackers to exploit to these systems. These cyber-attacks occur on water infrastructure world-wide and water providers, in order to reduce the risks, need to identify control system asset security vulnerabilities and design, build and maintain a security architecture proportionate to the risk. Human resources are fundamental to these cybersecurity systems and the required emerging job roles require industry specific definition. This paper provides definition on the roles and responsibilities for control system security governance, particularly from the perspective of skills and knowledge and training requirements with a view to addressing leading industry security standards for control systems and practices.
Abstract: Cyber-attacks are a growing and persistent threat to water infrastructure, including drinking water and wastewater systems. Water infrastructure uses a number of technical control systems to manage and track infrastructure properties, including hardware and software, such as monitoring and data acquisition systems, process control systems, and othe...
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