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This specification defines the material, mixing, placing, curing, constructional and other performance requirements for VACUUM DEWATERING CONCRETE SYSTEM for foncrete floor slab. Any other special requirements shown or noted on the drawings and directed by the Engineer-in-Charge shall govern over the provision of this specification.
Actual work shall be Carrie out in accordance with this specification and in consultation with specialised firm undertaking the job to suit specific requirement at site such as rise and fall of the floor slab, providing dowels for pedestals etc.
In case of conflict between clauses mentioned in this specification and those in any Indian Standard, this specification shall grown.
MATERIAL:
All materials of construction like cement, aggregatre, sand, water etc.
GRADE OF CONCRETE:
Minimum grade of concrete used shall be M15 conforming to IS-456. Only Design Mix Concrete shall be used. For other details like proportioning, batching, mixing, placing, curing etc.
WATER
SCOPE:
This specification defines the material, mixing, placing, curing, constructional and other performance requirements for VACUUM DEWATERING CONCRETE SYSTEM for foncrete floor slab. Any other special requirements shown or noted on the drawings and directed by the Engineer-in-Charge shall govern over the provision of this specification.
Actual work shall be Carrie out in accordance with this specification and in consultation with specialised firm undertaking the job to suit specific requirement at site such as rise and fall of the floor slab, providing dowels for pedestals etc.
In case of conflict between clauses mentioned in this specification and those in any Indian Standard, this specification shall grown.
MATERIAL:
All materials of construction like cement, aggregatre, sand, water etc.
GRADE OF CONCRETE:
Minimum grade of concrete used shall be M15 conforming to IS-456. Only Design Mix Concrete shall be used. For other details like proportioning,batching, mixing, placing, curing etc.
WATER-CEMENT RATIO:
Water-cement ratio upto 0.65 shall be allowed to obtain better slumb & workability. Actual ratio shall be decided with approval of the Engineer-in-charge. Only measured quantity of water shall be used in the mix.
SPECIAL REQUIREMENT:
All works covered by this specification shall be crried out by an experienced agency having sufficient expertise in vacuum dewatering concrete system. Only skilled and experienced operators shall be employed for the purpose. Prior approval of the agency shall be obtained from the Engineer-in-Charge before starting the work. All the equipment shall be of approved and proven types and suitable for the work involved.
CONCRETE LAYING:
Concrete laying pattern shall be decided in consultation with the Engineer-in-Charge and with his approval. The maximum width of a slab strip shall not generally exceed 4 metres and minimum number of construction joints shall be used. Alternate slab strips shall be sequentially laid. Any damage to the already finished top surface shall be avoided. At construction joints no overflow of mortal or slurry on the already hardened surface shall be allowed while concreting the intermediate slab strip. Such construction joints shall be marked with a thread in a straight line while the concrete is still green. Continuity of reinforcement shall be maintained while laying concrete in slab strips. Edges at expansion joints shall be protected and proper arrangement of shear-transfer shall be provided standards.
CONCRETE COMPACTION:
After placing concrete in position, it shall be vibrated thoroughly using Poker/needle vibrators and thereafter leveled with surface vibrators to produce a homogeneous and smooth concrete surface. In order to achieve a smooth surface to the satisfaction of the Engineering-in-Charge, surface vibrators shall be very carefully used by skilled operators. Over vibration resulting in excess mortar near the surface shall be avoided.
DE WATERING:
Suction mats shall be spread over the leveled fresh concrete surface and shall be connected by suction hose to the vacuum pumps for De-watering of surplus water in the concrete. During De-watering it shall be ensured that no cement/cement slurry is pumped out.
FLOATING & TROWELING:
This shall be done after De-watering by using skim floater(power floater. After this, surface shall be troweled with minimum two passes of power trowel to achieve a wear resistant surface to the satisfaction of the Engineer-in-Charge.
CURING:
However, all care shall be taken to avoid any stain any permanent stain on the surface. Any stain or permanent marking on the top surface shall be removed by approved means.
APPROACH WORKING PLATFORM & FORM WORK:
The Contractor shall arrange all arrange all approaches, scaffolding, working platforms etc. for carrying out the entire operation safely and in a work-man-like manner. The working area shall be nearly maintained and all the facilities required by the Engineer-in-Charge for proper supervision of the work shall be provided.
TESTING OF FINISHED FLOOR:
Contractor shall arrange for core cutting and testing of finished concrete over and above other field tests. Cores shall be taken after 28 days of concreting and tested as per relevant IS Codes. Core test results shall be compared with the normal cube test results taken from the same concrete. The average compressive strength of cores shall be minimum 40% higher than that of normal cube (15cm x 15cm x 15xm) test results. Minimum three cores for each day's work in the initial stages and as decided later by the Engineer-in-Charge shall be taken. The floor shall be properly rectified after cutting the cores with concrete of same mix using the same cement as earlier used and finished smoothly to match with the existing surface. The cut surface of the floor-concrete shall be coated with proper epoxy-based bonding compound before laying concrete to avoid shrinkage cracks or, alternatively, a non-shrink compound shall be added with concrete.
PAYMENT:
This clause shall apply to Item Rate tender only.
Payment shall be made on cubic meter(m3) basis of actually finished work or as calculated from the approved construction drawings, whichever is less. The reinforcement used shall be measured and paid separately on weight basis.
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What is IPS flooring?
IPS - Indian Patent Stone flooring is called IPS flooring which ordinary screeding concrete with vacuum dewatered finishing for industrial floorings. This is used for doing epoxy flooring purposes.
Does vacuum dewatered concrete requires curing?
Yes, the vacuum dewatered concrete requires curing in order to gain its strength.The concrete is cured for 28 days.
What is vacuum dewatered flooring?
Process In this system, concrete is poured in place & vibrated with a poker vibrator. Then a screed vibrator is run over the surface, supported on channel shuttering spaced 4.0 meters apart. The screed vibrator is run twice to achieve optimum compaction & leveling. After this a system of lower mats & top mat is laid on the green concrete & this is attached to a vacuum pump. This draws out excess water.Benefits 1. Compressive strength of floor increases by upto 60% 2. Tensile strength increases by @ 70% 3. Cement consumption is reduced to the extent of 40%, no cement is required separately for finishing the surface. 4. Abrasion resistance of the floor increases by @ 60% resulting in les wear and rear of the floor surface 5. Shrinkage of concrete is reduced and floor wraps less.
Can you assign temperature to a vacuum?
Answer Yes, you can. I think the answer is no. A physical object in a vacuum can have some energy/heat in it, and the energy associated with electromagnetic radiation can have energy/heat associated with it, but the vacuum itself cannot. ______________________________________________________________________ There is no such thing as a vacuum.
Was the vacuum invented by ives mcgaffey?
It was I. I invented the vacuum. Who am I? Your mother.
What is the full form of VDF flooring?
The full form of VDF Flooring is VACUUM DEWATERED FLOORING.
What should be the minimum thickness required for vacuum system dewatered flooring?
150mm
What is IPS flooring?
IPS - Indian Patent Stone flooring is called IPS flooring which ordinary screeding concrete with vacuum dewatered finishing for industrial floorings. This is used for doing epoxy flooring purposes.
What is the ratio for vdf flooring?
The Vacuum Dewatered Flooring or VDF Flooring is a system for laying high quality concrete floors where the key is Dewatering of Concrete by Vacuum Process wherein surplus water from the concrete is removed immediately after placing and vibration, thereby reducing the water: cement ratio to the optimum level.
Does vacuum dewatered concrete requires curing?
Yes, the vacuum dewatered concrete requires curing in order to gain its strength.The concrete is cured for 28 days.
Does this vacuum do both hard floor and carpeting?
This vacuum is designed for multiple surfaces including carpet and wood flooring.
Which Dyson vacuum cleaner is safe for all floors?
Dyson manufactures vacuum cleaners for every type of home flooring. If a model is labeled as 'All-Floors', however, it means the vacuum is equipped to handle multiple types of flooring, such as hardwood, short-length rugs, and even shag carpet.
What is the best vacuum for cleaning hardwood floors?
The best vacuum to clean hardwood floors with is the wet and dry vacuum. It can easily switch from wet carpet to dry hardwood flooring. It can be seen on the website for Kohl's.
How much does a Miele Callisto vacuum cost?
The Miele Callisto, also known as the S5281, is a top-of-the-range vacuum cleaner which is suitable for use on all types of flooring. The list price is $989.00.
Is the carpet really useful for home flooring?
Carpeting can be a useful in many situations. In areas where it is colder, carpet keeps the floors warmer then wood floors would. Carpeting also is easier to vacuum where wood flooring requires more care.
What is vdf flooring?
VDF Flooring also known as Vacuum Dewatered Flooring 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 & heavy traffic movement. In this system, concrete is poured in place & vibrated with a poker vibrator. Then a screed vibrator is run over the surface, supported on channel shuttering spaced 4.0 meters apart. The screed vibrator is run twice to achieve optimum compaction & levelling. After this a system of lower mats & top mat is laid on the green concrete & this is attached to a vacuum pump. This draws out excess water. The concrete is left to stiffen. When the base concrete has stiffened to the point when light foot traffic leaves an imprint of about 3-6 mm,a suitable Floor Hardener should be applied at an even application rate of between 3-5 Kg/Sqmt.  Any bleed water should now have evaporated, but the concrete should have a wet sheen. The concrete is then furt her compacted and levelled using Power Floater followed by finishing as per the requirement using Power Trowel.
How hard is it to maintain walnut hardwood flooring?
Maintaining walnut hardwood flooring takes a lot of work. You should vacuum of the floor regularly. After vacuuming, you should mop the surface of the wood. Do not use too much moisture lest the wood gets moisture stains.
