The various constituents combine in burning and form cement clinker. The compounds formed in the burning process have the properties of setting and hardening in the presence of water. They are known as Bogue compounds after the name of Bogue who identified them. These compounds are as follows: AliteRead more
The various constituents combine in burning and form cement clinker. The compounds formed in the burning process have the properties of setting and hardening in the presence of water.
They are known as Bogue compounds after the name of Bogue who identified them. These compounds are as follows: Alite (Tricalcium silicate or C3S), Belite (Dicalcium silicate or C2S), Celite (Tricalcium aluminate or C3A) and Felite (Tetracalciumalumino ferrite or C4AF).
VDF stands for Vacuum Dewatered Flooring. The vacuum dewatering method normally improves the 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. Procedure of VDF Flooring Tying Line DoriRead more
VDF stands for Vacuum Dewatered Flooring.
The vacuum dewatering method normally improves the 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.
Procedure of VDF Flooring
Tying Line Dori (Threads) as per the slope requirements
Laying Guide Rails to every 4 meters using MS Channels or as required in straight lines along the Line Dori, taking levels as per the slope and fixing them using concrete also called grouting and left to sit for a minimum of 24 hours
Pouring the concrete in between the channels and spreading using Shovel or Hoe (Kudal/Parah)
Vibrating the concrete with a poker vibrator especially to the sides of the panels
Surface Vibration of the concrete using Double Beam Screed Vibrator running over the guide rails twice to achieve maximum compaction for RCC with double mats
Final levelling of the concrete using the Straight Edge/Bull Float/Aluminium Bottom (Fanti/Baddha)
A system of lower mats & top mat is laid on the green concrete & this is attached to a vacuum pump. This draws out surplus water if any. (We strongly oppose the dewatering of RMCs. RMCs have a water-cement ratio already maintained to its minimum possible level by the addition of admixtures. Further dewatering decreases the water-cement ratio below the required level thereby causing undulations in the surface, loss in strength, and formation of cracks.)
The concrete is left to stiffen. When the base concrete has stiffened to the point when foot traffic leaves an imprint of about 3-6 mm and any bleed water should now have evaporated, but the concrete should have a wet sheen, Floor Hardener is applied at an even application rate of 3-7 Kg/Sqm or as per the requirement of the floor.
Application of Power Floater on the surface until the surface is sufficiently compacted & leveled with no major lines appearing anymore
Final finishing using Power Trowel and trowelling until the required finish is achieved. The finish could be any of the Smooth Finish, Sand Finish or Line Finish.
Benifits of VDF Flooring – Vacuum Dewatered Flooring
Increased Compressive strength by more than 50%.
Reduced Cement consumption by more than 30% as no cement is required separately for finishing.
Increased Abrasion resistance by more than 50%.
Increased wear resistance.
Minimum dusting & crack formation.
Minimum dry and plastic shrinkage and floor wraps.
Uniform homogeneous floor with High flatness accuracy.
Lower water permeability due to increased density.
High early strength minimizes damage on newly cast floors.
Darcy's law is an equation that describes the flow of a fluid through a porous medium. = instantaneous flow rate = permeability = dynamic viscosity of the fluid = pressure drop
Darcy’s law is an equation that describes the flow of a fluid through a porous medium.
To avoid the formation of expansive cracks as a result of temperature changes As concrete is placed in a confined space, it expands due to the high temperature, resulting in cracks. Concrete is not an elastic material, so it can not bend or stretch without breaking. Concrete, on the other hand, expaRead more
To avoid the formation of expansive cracks as a result of temperature changes As concrete is placed in a confined space, it expands due to the high temperature, resulting in cracks.
Concrete is not an elastic material, so it can not bend or stretch without breaking. Concrete, on the other hand, expands and shrinks, causing structural components to change slightly.
Several expansion joints are used in concrete construction to avoid adverse effects from concrete movement, including floors, walls, roof expansion joints, and paving slabs.
These joints must be engineered, found, and assembled with care. If a slab is continuously placed on surfaces with more than one face, an expansion joint will be required to minimize stresses. A concrete sealer may be used to fill in holes left by cracks.
Borrow pits are used for the purpose of filling and embankments, earth has to be excavated by digging trenches along the side of road or canal or a railway track. These parallel trenches from which earth is borrowed is known as Borrow pits. Borrow pits are a source of danger to the traffic and henceRead more
Borrow pits are used for the purpose of filling and embankments, earth has to be excavated by digging trenches along the side of road or canal or a railway track.
These parallel trenches from which earth is borrowed is known as Borrow pits.
Borrow pits are a source of danger to the traffic and hence should be avoided as far as possible.
What is the meaning of this paragraph ? ( Fiber hinge)
@sajjadashkani Please share the clear picture of your attachment.
Sajjad Ashkani Please share the clear picture of your attachment.
See lessWhat is the chemical composition of clinker?
The various constituents combine in burning and form cement clinker. The compounds formed in the burning process have the properties of setting and hardening in the presence of water. They are known as Bogue compounds after the name of Bogue who identified them. These compounds are as follows: AliteRead more
The various constituents combine in burning and form cement clinker. The compounds formed in the burning process have the properties of setting and hardening in the presence of water.
They are known as Bogue compounds after the name of Bogue who identified them. These compounds are as follows: Alite (Tricalcium silicate or C3S), Belite (Dicalcium silicate or C2S), Celite (Tricalcium aluminate or C3A) and Felite (Tetracalciumalumino ferrite or C4AF).
Read the full article about Composition of Cement Clinker
See lessWhat is VDF (Vacuum Dewatered) Flooring?
VDF stands for Vacuum Dewatered Flooring. The vacuum dewatering method normally improves the 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. Procedure of VDF Flooring Tying Line DoriRead more
VDF stands for Vacuum Dewatered Flooring.
The vacuum dewatering method normally improves the 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.
Procedure of VDF Flooring
Benifits of VDF Flooring – Vacuum Dewatered Flooring
Typical Application Areas of VDF Flooring
- Warehouses, Godowns
- Roads, Sports Courts
- Cellars, Parking Areas
- Production Areas
- Pharmaceutical Companies
- As the base floor for Epoxy & PU Floorings
See lessWhat is Darcy’s law?
Darcy's law is an equation that describes the flow of a fluid through a porous medium. = instantaneous flow rate = permeability = dynamic viscosity of the fluid = pressure drop
Darcy’s law is an equation that describes the flow of a fluid through a porous medium.
Why expansion joints are provided in concrete pavement?
To avoid the formation of expansive cracks as a result of temperature changes As concrete is placed in a confined space, it expands due to the high temperature, resulting in cracks. Concrete is not an elastic material, so it can not bend or stretch without breaking. Concrete, on the other hand, expaRead more
To avoid the formation of expansive cracks as a result of temperature changes As concrete is placed in a confined space, it expands due to the high temperature, resulting in cracks.
Concrete is not an elastic material, so it can not bend or stretch without breaking. Concrete, on the other hand, expands and shrinks, causing structural components to change slightly.
Several expansion joints are used in concrete construction to avoid adverse effects from concrete movement, including floors, walls, roof expansion joints, and paving slabs.
These joints must be engineered, found, and assembled with care. If a slab is continuously placed on surfaces with more than one face, an expansion joint will be required to minimize stresses. A concrete sealer may be used to fill in holes left by cracks.
See lesswhat are the advanced traffic management systems?
The advanced traffic management system is a broad concept of technology that comprises different types of features.
The advanced traffic management system is a broad concept of technology that comprises different types of features.
See lessWhat is borrow Pits?
Borrow pits are used for the purpose of filling and embankments, earth has to be excavated by digging trenches along the side of road or canal or a railway track. These parallel trenches from which earth is borrowed is known as Borrow pits. Borrow pits are a source of danger to the traffic and henceRead more
Borrow pits are used for the purpose of filling and embankments, earth has to be excavated by digging trenches along the side of road or canal or a railway track.
These parallel trenches from which earth is borrowed is known as Borrow pits.
Borrow pits are a source of danger to the traffic and hence should be avoided as far as possible.
See less