Construction News Magazine

Construction News Magazine On line Magazine , Construction,civil engineering,architect,road construction,house construction,building construction,technical audit,Bilding Construction

On line Magazine , Construction,civil engineering,architect,road construction,house construction,building construction,technical audit,

06/03/2024

Vacuum Dewatering of Floors
Er.Gurvinder Singh Bedi

Floors in factories & industry have always been a source of problem in the production areas. Abrasion of floor, breakage due to lower compressive strength etc are some of the prime reasons for failure of concrete floors.

Concrete being the most versatile of flooring material, has been in use for a long time. To overcome the deficiencies of concrete, a system was devised to improve the properties of such concrete floors. This system is called “Vacuum Dewatered Floors”.

This system permits us to add as much water for making concrete workable & easily pourable. Normally addition of water beyond a point reduces the strength of concrete. All the same, to mix the concrete well water used is generally more than the optimum water cement ratio. This system removes the excess water after pouring of the concrete & thus an ideal water cement ration can be achieved.
In this system, concrete is poured in place & vibrated with a poker vi****or. Then a screed vi****or is run over the surface, supported on channel shuttering spaced 4.0 meters apart. The screed vi****or 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. The surface immediately hardens after this process & becomes workable. This is followed by running the mechanical power floater to level off the surface. The last process is working the power trowel to trowel off the final finished surface.
The process is ideal for concrete roads too & is widely in use.

Some of the benefits this system has over conventional floors are:
• Compressive strength of floor increases by upto 60% resulting in higher structural strength & therefore durability.
• Tensile strength increases by @ 70%.
• Cement consumption is reduced to the extent of 40%, as no cement is required separately for finishing the surface.
• Abrasion resistance of the floor increases by @ 60% resulting in less wear & tear of the floor surface.
• Permeability is reduced as a result of which liquids falling on the floor have less detrimental effect on the concrete.
• Impact strength is increased.
• Shrinkage of concrete is reduced & the floor warps less.
• Numbers of joints are reduced as this method allows long strip floor as against conventional checkered method.
• Floors can be put to use much earlier because of lesser curing time.
• Water/cement ratio is reduced by @ 18%.

06/03/2024

TACK COAT
Tack coats are a vital component of an asphalt pavement’s structural system as they bond the multiple asphalt lifts into one monolithic layer. Poor tack coat application results in poor bonding of the asphalt layers. The usual pavement distresses associated with poor or no tack coat is slippage cracks ( typically at locations where traffic is braking or accelerating) along with delamination of the surface lift. But quite often poor tack coat can lead to more classic structural pavement distresses, namely fatigue cracking and potholes, commonly without the poor tack being recognized as the source of these early failures. In fact, researchers have indicated that even with a small loss in bond strength (10-30%), fatigue life can be reduced significantly (50-70%). Moreover, the cost to an agency in the event of a bonding failure can be quite large, potentially even exceeding the original costs of a maintenance overlay. Despite these facts, little attention is often paid to tack coat operations by both contractors and the agencies, and pavement performance suffers.

31/07/2022

This video provides a summary of test method procedures. For more information on this method, including calculations, please visit the CTTP online training ...

Concrete Products by BUILTECH ENGINEERS LUDHIANA.
01/10/2021

Concrete Products by BUILTECH ENGINEERS LUDHIANA.

30/08/2021

Types of Paver Blocks
There are two types of paver blocks:
1. Concrete Paving Block
Concrete blocks are mass manufactured to standard sizes. Hence, they can be easily interchanged. A typical concrete block has two surfaces - one is smooth, and the other is a rough surface. The concrete paving blocks are most suitable for heavy-duty applications, able to support substantial loads and resist shearing and braking forces. The concrete blocks come in various colors. The colors typically come from metallic oxides. However, there is a possibility of these colors to fade away. Hence one needs to be very careful while choosing the color of the block. Concrete paving blocks are the most preferred choice for laying of pavements, driveways, etc.
2. Clay Paving Blocks
Clay paving blocks are also called bricks or cobbles. These blocks are generally available as typical, rectangular brick-shaped. Although custom shapes can be made for specific projects. Unlike the concrete paving blocks, either side of clay paving blocks can be used. So both sides are interchangeable. Clay blocks are available in natural color only; hence the possibility of color fading is not there in these blocks. These blocks are mostly used for walls or pillars.
Shapes and Classification of Paver Blocks
There are four generic shapes of paver blocks corresponding to the four types of blocks:
1. Type A: Paver blocks with plain vertical faces, which do not interlock into each other when paved in any pattern,
2. Type B: Paver blocks with alternating plain and curved/corrugated vertical faces, which lock into each other along the curve/corrugated faces, when paved in any pattern,
3. Type C: Paver blocks having all faces curved or corrugated, which lock into each other along with all the vertical faces when paved in any pattern and
4. Type D: 'L' and 'X' shaped paver blocks that have all faces curved or corrugated and which lock into each other along with all the vertical faces when paved in any pattern.

Advantages of Paver Blocks
1. Paver blocks do not need special maintenance as compared to concrete or asphalt surfaces. A simple water washing can help keep the blocks clean and bright.
2. Paver blocks are very durable, and if they are adequately interlocked, they can easily last for about 20 years. Paver blocks can withstand hefty vehicular load as well.
3. Paver blocks are available in different shapes and colors, making it very versatile. These blocks can be used at residential as well as commercial premises.
4. Paver blocks are slip-resistant and skid resistant.
5. Paver blocks can be used in any weather conditions.
6. These paver blocks are very easy to install and do not need any special equipment for its installation.
7. The most important advantage of paver blocks is that they can be easily replaced. If one of the blocks gets damaged, it can be easily removed and replaced with another one.
Uses of Paver Blocks
With all these advantages, paver blocks are the most sort after solution for exterior pavement or driveways. These paver blocks not only make the exterior pathways look clean and neat but are also safe for walking on. Paver blocks are a definite solution for a low maintenance pathway.

13/06/2020

National Highways Authority of India on Friday announced that it has gone 'fully digital'. The entire project management work flow of NHAI has been transformed from manual to online portal based. All project documentation, contractual decisions and approvals will now be done through portal only, sai...

Address

# 723/1 Brown Road
Ludhiana
141008

Opening Hours

Monday 9am - 5pm
6pm - 7pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm
Saturday 9am - 5pm
Sunday 9am - 4am

Telephone

+919855024382

Website

Alerts

Be the first to know and let us send you an email when Construction News Magazine posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Construction News Magazine:

Shortcuts

Share

Category