The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
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what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.
Vacuum concrete is the type of concrete in which the excess water is removed for improving concrete strength.
The water is removed by use of vacuum mats connected to a vacuum pump.
The main aim of this technique is to extract extra water from concrete surface using vacuum dewatering.
The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
vacuum dewatering system
vacuum dewatering pump
vacuum dewatering box
wellpoint pump systems
dewatering pump system
dewatering pump
dewatering wellpoint
small wellpoint dewatering systems
interesting civil engineering topics
civil engineering topics for presentation
civil seminar topics ppt
civil engineering seminar topics 2018
best seminar topics for civil engineering
seminar topics pdf
seminar topics for mechanical engineers
seminar topic for civil engineering pdf
what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.
Vacuum concrete is the type of concrete in which the excess water is removed for improving concrete strength.
The water is removed by use of vacuum mats connected to a vacuum pump.
The main aim of this technique is to extract extra water from concrete surface using vacuum dewatering.
TREMIX;
Special concrete floor surface harden by admixtures and dewatering used in industrial facilities
DEWATERING ;
Dewatering is the removal of water from solid material by wet classification and filtration or similar solid liquid separation
prepared by Hebin J Chiriyankandath
Jyothi Engineering College Thrissur Kerala India
seminar topic for civil engineering students
Here, I attach a PowerPoint presentation created by me for a competition held by UltraTech. Have a look at this and feel free to share your views with me.
It is used as a mould for a structure in which fresh concrete is poured only to harden subsequently.
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Civil Engineering presentation topic. Its a green house building material, environment friendly and has wide application in constructions related to civil engineering projects.
TREMIX;
Special concrete floor surface harden by admixtures and dewatering used in industrial facilities
DEWATERING ;
Dewatering is the removal of water from solid material by wet classification and filtration or similar solid liquid separation
prepared by Hebin J Chiriyankandath
Jyothi Engineering College Thrissur Kerala India
seminar topic for civil engineering students
TREMIX;
Special concrete floor surface harden by admixtures and dewatering used in industrial facilities
DEWATERING ;
Dewatering is the removal of water from solid material by wet classification and filtration or similar solid liquid separation
prepared by Hebin J Chiriyankandath
Jyothi Engineering College Thrissur Kerala India
seminar topic for civil engineering students
Here, I attach a PowerPoint presentation created by me for a competition held by UltraTech. Have a look at this and feel free to share your views with me.
It is used as a mould for a structure in which fresh concrete is poured only to harden subsequently.
formwork for concrete slab
beam formwork
steel formwork
doka h20
types of formwork
formwork for concrete
what is formwork in construction
building formwork
plywood disadvantages
advantage plywood
advantages and disadvantages of wood
best plywood for formwork
plywood formwork for concrete
mdf advantages and disadvantages
examples of advantages and disadvantages
advantage steel and construction
advantages of steel
disadvantages of steel structures
examples of advantages and disadvantages
advantages and disadvantages of surveys
wiki advantages and disadvantages
steel formwork design
steel formwork system
Civil Engineering presentation topic. Its a green house building material, environment friendly and has wide application in constructions related to civil engineering projects.
TREMIX;
Special concrete floor surface harden by admixtures and dewatering used in industrial facilities
DEWATERING ;
Dewatering is the removal of water from solid material by wet classification and filtration or similar solid liquid separation
prepared by Hebin J Chiriyankandath
Jyothi Engineering College Thrissur Kerala India
seminar topic for civil engineering students
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.”
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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Ques: 1.Why this system is called SLIPFORMING?
Ques: 3.Slipforming is mechanized way of constructing very high structures & involves Mechanical/Civil/Hydraulic Engineers. Explain?
Ques: 4.How the tapering structures are made by Slipforming? How do we reduce
diameter, wall thickness & do Lifting Simultaneously?
Ques: 5.Manpower saving in Slipforming (no carpenters required), Good for the
Country/Employment?
Ques: 6.Will mechanization in form work render our carpenters idle?
Ques: 7.Scaffolding is major capital investment in Construction Projects, no
scaffolding is required for Slipform Projects, and how Slipforming is cost effective?Please discuss.
Concrete -
The most used construction material.
In here a brief about its -
Ingredients
Grades
Production &
Properties
are discussed with appropriate pictorial presentation making it quite simpler for understanding.
Similar to VACUUM DEWATERED FLOORING ( V D F ) (20)
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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.
3. WHAT IS VACUUM DEWATERED
FLOORS..???
• Concrete is being the most versatile of flooring material
has been in use for a long time.
• To overcome the deficiencies of concrete flooring, a system
was devised to improve the properties of such concrete
floors.
• This system was “VACUUM DEWATERED FLOORS” …
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4. • It permits to add much water for workable and easily
pourable.
• The addition of water reduces the strength of the
concrete.
• This system removes the excess water and maintain an
ideal water/cement ratio.
• This system will maintain all the properties of the
concrete.
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5. DEFINITION FOR VACUUM
DEWATERED FLOORS..!!!
A Vacuum Dewatered Concrete Flooring method can be
defined as, “ Vacuum Dewatered Flooring ( V D F ) is a
special type of flooring technique to achieve High
strength, Longer life, Better finish and Faster work. This
type of floor is suitable for high abrasion and heavy traffic
movement.”
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6. BENEFITS OF VACUUM DEWATERED
FLOOR…!!!
• Adopting the V D F method facilitates use of concrete
with better workability than what is normal possible.
• A lowered water/cement ratio leads to improve in each
properties of concrete like Wear Resistance, Compressive
Strength, Less Shrinkage and Minimum Water
Permeability.
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7. BENEFITS OF VACUUM DEWATERED
FLOOR…!!!
• It will reduce the water content in the concrete by 15% -
25%, and increase the Compressive Strength.
• By lowering the W/C ratio, the tendency of shrinkage and
subsequent cracking is greatly reduced.
• Since the W/C ratio is lowered through vacuum
dewatering, concrete of high initial slump can be used
while pouring.
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8. • First patented in United States of America, nearly half a
century ago.
• Those who attracted in recent years after several
Scandinavian firms simplified the equipment enough to
make it practical for almost builders.
HISTORY OF V D F…!!!
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9. HISTORY OF V D F…!!!
• Vacuum Dewatering is used widely throughout Europe
today, and in Sweden.
• The method is used for 40 – 50% of all concrete floors.
• Tremix or Vacuum Dewatered Flooring is popularly known
in India.
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10. HISTORY OF V D F…!!!
• This process was introduced in India by Aquarius
Technologies in 1987.
• In 1991 to start production of Vacuum System in India.
• It became so popular in India that almost everybody
related to concrete flooring industry.
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11. FUNDAMENTALS FOR
DEVELOPMENT OF V D F…!!!
VALUE FOR
MONEY
LEVEL FLOOR,
HIGH FLATNESS
ACCURACY
IMPROVE WEAR
RESISTANCE
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12. NEED OF V D F…!!!
• The mixing water added to a concrete mix exceeds the
amount of water required to fully hydrate the cement
constituent.
• The additional water functions as a lubrication medium to
allow mixing, placing and consolidation.
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13. NEED OF V D F…!!!
• In conventional concreting practice, an important
challenge is the prevention or limiting of evaporation of
mixing water out of the freshly placed concrete.
• The uncontrolled removal of water from the concrete
matrix can result in adverse effects such as plastic
shrinkage cracking.
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14. NEED OF V D F…!!!
• Excessive bleeding of concrete can caused for wear
resistance.
• Thus the durability and service life of the flooring
element is in question.
• In hot and windy conditions it produce quality, durable
concrete.
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18. VACUUM DEWATERING PROCEDURE…!!!
• Preparation of sub base.
• Divide floor area into panels.
• Preparation of framework using steel channels.
• Laying down of steel bars of specified size.
• Mix design of concrete.
• Placing of concrete and compacting.
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19. VACUUM DEWATERING PROCESS…!!!
• The vacuum dewatering process removes surplus water
present in the concrete.
• This is done using the Vacuum Equipment comprising of
Suction Mat Top Cover, Filter pads and Vacuum Pump.
• This process starts immediately after surface vibration.
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20. VACUUM DEWATERING PROCESS…!!!
• Filter pads are placed on the fresh concrete leaving
about 4 inches of fresh concrete exposed on all sides.
• The top cover is then placed on the filter pads and rolled
out till it covers the strips of exposed concrete on all
sides.
• The top cover is then connected to the vacuum pump
through a suction hose and the pump is started.
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21. VACUUM DEWATERING PROCESS…!!!
• Vacuum is immediately created between the filter pads
and the top cover.
• Atmospheric pressure compresses the concrete and the
surplus water is squeezed out.
• This process lowers the water content in the concrete by
15 – 25%.
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22. VACUUM DEWATERING PROCESS…!!!
• The dewatering operation takes approximately 1.5 – 2
minutes per centimetre thickness of the floor.
• The dewatered concrete is compacted and dried to such an
extent that is possible to walk on it without leaving any foot
prints.
• This is the indication of concrete being properly dewatered
and ready for finishing.
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23. EFFECT OF V D F METHOD…!!!
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24. ADVANTAGES OF V D F…!!!
• Reduction in W/C ratio leads to early setting and high
strength.
• It removes the excess water of the concrete & an ideal
W/C ratio can be achieved.
• Increase in compressive strength of concrete by 40 – 70%.
• The surface hardness of the slab increase by 130%.
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25. ADVANTAGES OF V D F…!!!
• Water absorption is reduced enormously.
• Minimum dusts.
• Level floor, high flatness accuracy.
• Minimized crack formation, shrinkage reduced by 50%.
• Improved wear resistance.
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26. ADVANTAGES OF V D F…!!!
• Elimination or minimization of overtime.
• High and early strength, minimize damage to newly cast
floors.
• Void – free and Denser concrete.
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27. DISADVANTAGES OF V D F…!!!
• High initial cost.
• Skilled Labour is needed.
• Need specific equipment for vacuum dewatering like
vacuum pump.
• Need power consumption during dewatering process.
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32. CONCLUSION…!!!
Vacuum Dewatering process is very important modern
construction work in the context of economy, facility,
modern technology and comfort. It is very useful for
special purpose projects like for the use of wear house,
parking area, industrial flooring like flooring of large area.
Nowadays V D F is used with modern techniques and
machineries.
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