Concrete cloth is a flexible cement-impregnated fabric that hardens into a thin concrete layer when hydrated with water. It was originally developed for rapidly deployable shelters but now has a wide range of applications. Concrete cloth is quicker and cheaper to install than conventional concrete, can be cut and formed on site, and requires only water for construction. It is durable, waterproof, and fireproof once set.
Concrete Canvas is a flexible concrete impregnated fabric that hardens on hydration to form a thin, durable water proof and fire-resistant concrete layer. Essentially, it’s concrete on a roll.
Concrete cloth - PowerPoint by Hrishikesh KaneHrishikesh Kane
Concrete cloth is a latest innovation in concrete technology, with rapid construction capabilities and easy workability, this PowerPoint presentation allows you to have a peek into its features and superficial information, also papers are published in two international journal on same subject, It is intended to help whoever needs an insight to the subject, for inquiry write on hrishi.k9922@gmail.com
Figure 1.1:Concrete Cloth
CC consists of a 3- dimensional fibre matrix containing a specially formulated dry Concrete mix. A PVC backing on one surface of the cloth ensures the material is completely waterproof, while hydrophilic fibres (Polyethylene and Polypropylene yarns) on the opposite surface aid hydration by drawing water into the mixture. The material can be hydrated either by spraying or by being fully immersed in water. It can be easily nailed, stapled through or coated with an adhesive for easy attachment to other surfaces. Once set, the fibres reinforce the concrete, preventing crack propagation & providing a safe plastic failure mode. CC is available in 3-thicknesses; CC5, CC8 & CC13, which are 5, 8 & 13 mm thick respectively
Concrete Canvas is a flexible concrete impregnated fabric that hardens on hydration to form a thin, durable water proof and fire-resistant concrete layer. Essentially, it’s concrete on a roll.
Concrete cloth - PowerPoint by Hrishikesh KaneHrishikesh Kane
Concrete cloth is a latest innovation in concrete technology, with rapid construction capabilities and easy workability, this PowerPoint presentation allows you to have a peek into its features and superficial information, also papers are published in two international journal on same subject, It is intended to help whoever needs an insight to the subject, for inquiry write on hrishi.k9922@gmail.com
Figure 1.1:Concrete Cloth
CC consists of a 3- dimensional fibre matrix containing a specially formulated dry Concrete mix. A PVC backing on one surface of the cloth ensures the material is completely waterproof, while hydrophilic fibres (Polyethylene and Polypropylene yarns) on the opposite surface aid hydration by drawing water into the mixture. The material can be hydrated either by spraying or by being fully immersed in water. It can be easily nailed, stapled through or coated with an adhesive for easy attachment to other surfaces. Once set, the fibres reinforce the concrete, preventing crack propagation & providing a safe plastic failure mode. CC is available in 3-thicknesses; CC5, CC8 & CC13, which are 5, 8 & 13 mm thick respectively
Shortcreting has proved to be the best method for construction of curved surfaces. Domes are now much easier to construct with the advent of shotcrete technology. Tunnel linings are also becoming easy with this technology. Not only are these but there a wide range of applications where this technology has been a leading one. This technical paper includes the concept of shotcrete and how it differs from conventional concrete. It also enumerates the different types of process involved in shotcreting i.e. dry mix process and wet mix process. Advantages of shotcrete and its applications in various fields like tunneling, canals, buildings etc. are specified in detail. This paper presents an overview of shotcreting technology along with its applications.
DEFINITION OF SHOTCRETE:-
Shotcrete is a mortar or high performance concrete conveyed through a hose and pneumatically projected at high velocity onto a backing surface. It is the force of this spraying action that leads to compaction of the concrete or mortar which then forms layers of concrete to the required thickness. Shotcreting has been an acceptable way of placing cementitious material in a variety of applications.
Usually patented polypropylene fibers are included in the shotcrete which increases the cohesive nature of the shotcrete through mechanically binding the cementitious materials together. This mechanism reduces the rebound waste that occurs through the shotcreting process and these fibers also resist plastic shrinkage and cracking through their ability to enhance the early stage tensile strength of concrete.
Shotcrete also gives better surface finishes and reduces surface tearing on non- linear sections. Cementitious material containing the poly propylene fibers resist cycles of freezing and thawing and also reduces the chances of water and chemical penetrations.
Self-curing concrete is achieved by means of replacing a part of aggregate by lightweight aggregate or adding chemical admixtures. The self-curing process of concrete takes place from inside to outside, thus reducing the autogenous shrinkage and self-desiccation, especially for the high-performance concrete with relatively low water/binder ratio.
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Shortcreting has proved to be the best method for construction of curved surfaces. Domes are now much easier to construct with the advent of shotcrete technology. Tunnel linings are also becoming easy with this technology. Not only are these but there a wide range of applications where this technology has been a leading one. This technical paper includes the concept of shotcrete and how it differs from conventional concrete. It also enumerates the different types of process involved in shotcreting i.e. dry mix process and wet mix process. Advantages of shotcrete and its applications in various fields like tunneling, canals, buildings etc. are specified in detail. This paper presents an overview of shotcreting technology along with its applications.
DEFINITION OF SHOTCRETE:-
Shotcrete is a mortar or high performance concrete conveyed through a hose and pneumatically projected at high velocity onto a backing surface. It is the force of this spraying action that leads to compaction of the concrete or mortar which then forms layers of concrete to the required thickness. Shotcreting has been an acceptable way of placing cementitious material in a variety of applications.
Usually patented polypropylene fibers are included in the shotcrete which increases the cohesive nature of the shotcrete through mechanically binding the cementitious materials together. This mechanism reduces the rebound waste that occurs through the shotcreting process and these fibers also resist plastic shrinkage and cracking through their ability to enhance the early stage tensile strength of concrete.
Shotcrete also gives better surface finishes and reduces surface tearing on non- linear sections. Cementitious material containing the poly propylene fibers resist cycles of freezing and thawing and also reduces the chances of water and chemical penetrations.
Self-curing concrete is achieved by means of replacing a part of aggregate by lightweight aggregate or adding chemical admixtures. The self-curing process of concrete takes place from inside to outside, thus reducing the autogenous shrinkage and self-desiccation, especially for the high-performance concrete with relatively low water/binder ratio.
interesting civil engineering topics
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Self curing concrete is , defines self-curing concrete as “the process by which small inclusions dispersed within the concrete hold the water during mixing and up to the setting time and release it during cement hydration.”
Paste Viscosity!
Attained by one of three means:
High cement content
High content of Fly Ash, Silica Fume etc
Use of Viscosity Modifying Admixture
Also low water content using HRWR
Cellular Lightweight Concrete is also known as CLC. In other words, CLC is also known as foamed concrete. The CLC is widely used for construction purposes as it has various advantages and usage than the traditional concrete bricks.
The foamed concrete is manufactured from mixing of Portland cement, sand, fly ash, water and performed foam in varied proportions. This CLC (Cellular Lightweight Concrete) can be produced at building sites with the use of machines and molds used for normal concrete.
One of an important characteristic of foamed concrete is it has self-compacting property as there is no compaction is required. And also, it easily flows out from the pump to fill the mold. With this property is can be pumped to maximum distance and height.
For continuous cellular lightweight concrete is manufactured by mixing light mortar and preformed foam under pressure in a special static mixer.
Concrete cloth is a ground breaking material technology that allows concrete to be used in completely new ways. It is a flexible cement- impregnated fabric that hardens on hydration to form a thin, durable water proof and fire proof concrete layer
Light weight concrete-materials properties and types. Typical light weight concrete mix High density concrete and high performance concrete-materials,properties and applications, typical mix.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
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This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
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An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
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It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2. INTRODUCTION
• Concrete cloth (CC) is a unique proprietary material.
• It has a very wide range of applications in the building & civil engineering
industry.
• Concrete cloth is a flexible; cement impregnated fabric that hardens when hydrated
to form a thin, durable, water & fire proof concrete layer. CC allows concrete
construction without the need for plant or mixing equipment. Simply position the
canvas & just add water. CC has a design life of above 10 years and is significantly
quicker and less expensive to install compared to conventional concrete.
3.
4. HISTORY OF CONCRETE
CLOTH
• The British Army just placed a sizeable order for an innovative new
material that combines the flexibility of fabric with the structural
performance of concrete. Unlike anything else on the market, this
revolutionary technology enables the use of concrete in a completely
new way. The product, called Concrete Cloth, was developed by a
British engineering company called Concrete Canvas. It will soon be
used to enhance frontline defenses in Afghanistan.
6. DEPLOYABLE SHELTERS
• The original concept for Concrete Canvas was to create rapidly
deployable hardened shelters that required only water and air for
construction. The key was the use of inflation to create a surface that
was optimized for compressive loading. This allowed thin-walled
concrete structures that are both robust and lightweight
8. METHODOLOGY
• Concrete Canvas (CC) is a flexible; cement impregnated
fabric that hardens when hydrated to form a thin,
durable, water and fire proof concrete layer. The
following data provides useful information for installers,
customers and specifies of CC. It provides an overview
of useful data and techniques that can be used across a
wide range of applications.
10. METHOD OF HYDRATION
• CC can be hydrated using saline or non saline
water. The minimum ratio of water to CC is 1:2 by
weight. CC cannot be over hydrated so an excess
is recommended. The recommended methods are:
In a hot/arid environment, re-wet the material 2 - 4
hours after the initial hydration.
13. FINISHING
• The fiber surface of CC can be easily painted once set using standard exterior
masonry paint. This provides a quick and simple method of improving the
aesthetic appearance of CC. Alternatively, Concrete Canvas Ltd. can
recommend a range of copolymer concrete surface treatments which can
provide a colored uniform finish as well as hydrophobic protection against
staining and organic growth. Fire retardant paints have also been shown to be
effective where thermal performance is critical.
16. ADVANTAGES OF CC
• Fireproof-Concrete Cloth is a ceramic-based material and will not burn;
• Waterproof-the PVC backing on one surface ensures that Concrete Cloth is
completely waterproof;
• Adaptable-Concrete Cloth is currently supplied on 1.2 m (4 ft) wide rolls but
can be manufactured with a roll width of up to 5 m (16.4 ft). The cloth can be
produced in a range of thicknesses from 5 to 20 mm (0.2 to 0.8 in.); and
• Durable-Concrete Cloth is chemically resistant and will not degrade in
ultraviolet light.
• Environmentally Friendly
17. LIMITATIONS OF CC
• CC cannot be over hydrated and an excess of water is
always recommended.
• Do not jet high pressure water directly onto the CC as this
may wash a channel in the material..
• CC has a working time of 1-2 hours after hydration. So do
not move CC once it has begun to set.
• Working time will be reduced in hot climates.
• If CC is not fully saturated, the set may be delayed and
strength reduced.
18. CONCLUSION
• Concrete cloth (CC) is a unique proprietary material. It is a time &
material saving technique.
• It is very easy to place & handle. Concrete cloth is a flexible; cement
impregnated fabric that hardens when hydrated to form a thin, durable,
water & fire proof concrete layer.
• CC allows concrete construction without the need for plant or mixing
equipment. Simply position the canvas & just add water. CC has a
design life of 10 years and is significantly quicker and less expensive to
install compared to conventional concrete.