by Sawon Banerjee | Oct 13, 2020 | Construction Equipments
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Mithilesh Kumar
Director,
Layher Scaffolding Systems Pvt Ltd
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For more than 75 years, Layher (the name of German Company) has been synonymous worldwide with high-quality and practically tested scaffolding systems. The proven combination of positive and non-positive connections in a rapid and bolt-free system technology with Auto Lock function facilitates connections that are automatically right-angled, obtuse-angled and acute-angled – and ensures built-in safety at the same time. Layher Allround Scaffolding has now become synonymous with modular scaffolding on the market. Layher is present worldwide with more than 30 sales subsidiaries. The products are used for construction in all kinds of industries like chemical plants or power plants, at shipyards and offshore. Due to innovative products, superior technical solutions and Layher’s absolute customer orientated service package, Layher has become the standard in scaffolding systems worldwide.
It’s a challenging work for Scaffolder, a work scaffolding had to be constructed that exactly followed the complex contours of two new greenhouses. The Allround Scaffolding was the natural choice. Its comprehensive range of parts not only made it possible to put together the circular structure without difficulty and modify it as the work progressed, but the bolt-free wedge-head connection technology also allowed the work to go very fast.
What do grains of paradise, cubeb berries and cassia bark have in common? Each is one of the ten “botanicals” in Bombay Sapphire – the exotic ingredients from around the world that give this alcoholic beverage its unmistakable character. With its many enthusiasts, Bombay Sapphire is said to be world’s fastest growing premium gin. To ensure the continued success of this famous brand, the owners decided to establish special production facilities and a visitor centre on the site of the historic mill in Laverstoke, Hampshire, about 60 miles from London. A special attraction of the new distillery is a pair of unusually shaped greenhouses, where the ten Mediterranean and tropical “botanicals” in the secret recipe will be cultivated.
To build the greenhouses with their diameters of 11 and 9 metres and heights of 15 and 11 metres respectively, it was necessary to put up complex work scaffolding. On the one hand the scaffolding had to fit within a small space owing to the nearby river, and on the other, it had to provide full access to the interior and exterior of both structures during every phase of construction. This included the “neck area” connecting the ultramodern domes to the existing brick building, the area around the foundation and finally the central area. The highly experienced British scaffolding constructors knew they could find an optimum solution only by using Layher Allround Scaffolding.
The modular system with its comprehensive range of parts offers unbeatable versatility, in particular for dealing with extremely challenging environments or complex architecture. Thus, the circular scaffolding was erected step by step without any trouble. The high load-bearing capacity of the Allround system allowed safe, material-saving assembly even though access to the site was limited. Another important advantage was the system’s high degree of adaptability, because the scaffolding had to be modified on a continuous basis. And this had to be done very quickly in order to keep pace with the construction schedule. The modifications were made easy by bolt-free wedge-head connection technology and precisely fitting, self-explanatory assembly using system components.
Thus, the scaffolding erectors succeed in implementing a well-though-out structure that gave craftsmen of various trades safe access at all times to high areas of the remarkable greenhouses. The greenhouse design, inspired by a long tradition in British greenhouse architecture, harmonizes perfectly with the Laverstoke Mill surroundings. The mill itself has an impressive history. First mentioned in 1086, it produced high-quality banknote paper for the Bank of England for more than 200 years in the 18th and 19th centuries. In the 20th century, the buildings fell into disrepair, but now they have been rediscovered, restored and transformed – into a state-of-the-art distillery.
Layher Allround Scaffolding usually takes the form of single-bay Scaffolding structures that are used for assembly and Construction/maintenance work in all area of Industries for example trench bridges, concreting work cable bridges, irregular shape of structure, dome and tall building. The Allround modular systems are economic efficiency, high stress capability and safety of the entire systems.
For further information,
visit: www.layher.co.in
by Sawon Banerjee | Oct 13, 2020 | Construction Equipments
The L&T team deployed on site at Noamundi provided round-the-clock service and was a critical success factor in achieving this milestone. L&T was engaged as the service partner to provide maintenance for Komatsu fleet under FMC contract, besides extending equipment training for the operators.
Today, Tata Steel operates a total fleet of 64 Komatsu machines in its Ore Mines and Quarries Division in Noamundi (Jharkhand), Joda (Odisha) and Khondbond (Odisha). This fleet includes HD785 Dump Trucks, WA900 Wheel Loaders, GD825A Motor Graders, D275 Crawler Dozers, WD600 Wheel Dozer and Water Sprinklers. L&T has also supplied Komatsu machines to TSL’s captive Coal Mines in West Bokaro.
For further information,
visit: www.larsentoubro.com
by Sawon Banerjee | Oct 13, 2020 | Construction Equipments
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Chetan Gole
CEO (Forklifts Vertical),
Action Construction Equipment Ltd.
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ACE is India’s leading material handling and construction equipment manufacturing and the largest crane manufacturing company in the world. The company has joined hands with Doosan Corporation, a Korean multinational conglomerate to represent their Industrial Vehicle – MHE segment in India. This is a strategic move for both the partners to secure a majority market share in India.
Doosan Corporation, a fortune 500 company, is one of the first foreign MHE brands to foray in India. It had its supremacy established through its technologically advanced and innovative products. The brand is popular for its reliability and dependability. ACE is an Indian brand grown with core philosophy of offering reliable products at reasonable prices, supported by prompt services.
Past couple of years of economic growth in India has pulled and established many MNCs in India. These global brands and certain Indian industry segments have affinity towards high performance premium products. This industry segment contributes to approx. 20-25% of current MHE business. The share is mainly taken by imported European and Japanese brands.
The co-operation will help Doosan regain and consolidate its market share by using widespread ACE network of 100+ dealers for sales and service support across India. Further, ACE gets a pie of premium segment, increasing its market share further. So, it’s a win-win strategy for both partners. This new partnership of Doosan in India with ACE is expected to streamline and support existing customers and infuse new energy and confidence in the Doosan Brand in India, making them leader in India in the premium segment.
For further information,
visit: www.ace-cranes.com
by Sawon Banerjee | Oct 13, 2020 | Construction Chemicals And Materials
Global construction technology leader Trimble recently announced a strategic partnership between Tekla Structures – Trimble’s flagship product and Metal Building Software (MBS), the globally leading software for the Metal Building Industry. Under this alliance, the two companies have built an exclusive link between MBS and Tekla Structures that delivers a full Building Information Modelling (BIM) process for all metal buildings.
The exclusive workflow between MBS and Tekla Structures will provide a single complete BIM solution from design and costing through detailing and fabrication for any kind of metal building more accurately, and in lesser time than ever before.
Speaking on the partnership, Mr. Paul Wallett, Regional Director, Middle East, and India, Trimble Solutions said,“In the post-pandemic times, off-site construction practices have become increasingly tactical, especially in the face of labour shortages, social distancing norms and rising costs due to project delays. The government has announced 102 lakh crore worth ambitious National Infrastructure project pipeline. For the realization of this goal, adopting modern methods like pre-engineered construction is important, as this is capable of reducing the total construction time of the project by as much as 50%. As a global leader in construction technology solutions, we are delighted to have partnered with MBS to bolster this manufacturing-centric construction further.”
“The two innovation drivers have joined hands to provide an end-to-end solution for design, costing, detailing, and fabrication for all kinds of pre-engineered buildings. This partnership will help deliver better workflow to all metal building fabricators by integrating design and detailing with fabrication, and efficient information sharing. We are proud to collaborate with Trimble and believe that the combination of our purpose-built, world-known software and the Tekla BIM solution will not only help our customers to achieve remarkable time savings in their projects and win more work but also manage and optimize even more complex pre-engineered building structures while minimizing errors and waste,” says Dean Jorgenson, President, Metal Building Software Inc.
Companies in the pre-engineered building industry can use this exclusive link to first analyse, design, and weight-optimize the building framing in MBS and then seamlessly transfer the project to Tekla Structures, using the 3D model to finalize detailing for fabrication. MBS generates engineered and detailed output in minutes. Further, Trimble Connect can be used to control the project in a centralized manner and have various stakeholders remain connected to the up-to-date information through fabrication to the site.
For further information,
visit: https://www.tekla.com/solutions/
steel-fabricators/project-types/preengineered-buildings-PEB
by Sawon Banerjee | Oct 13, 2020 | Construction Chemicals And Materials
(Utilization Of Aerobic And Anaerobic Bacteria In Concrete Technology)
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Premankur Bhattacharya
Technical Head,
ANN WORLD
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The global achievement in development of technology is commendable. Concrete technology has brought a revolutionary change in modern civilization and a continuous research is being conducted on this subject. Different grades of concrete with different types of plasticizers are very common now. Moreover, we can change the properties of concrete according to the practical requirement at site.
This section of TCT would like to focus on different microbes, which have important role in modification of concrete. The basic reaction in this technology is between lime and microbes. Anaerobic and aerobic bacteria and their catabolism synthesis are not similar. Each bacteria has its own mechanism to take part in reaction with concrete. Bacterial cell count, i.e., colony-forming unit (CFU) has great impact on properties of concrete and self-healing concrete is the simplest example of this.
Looking Back
Ancient architectures are witness of several such monuments. The persistence of the resultant product in the ancient structure is the reaction between lime and different microbes. In fact, we do not know how the microbes were named and chosen at that time. Because no such evidence is documented yet, perhaps at that time, great builders had some other strategy to carry out this reaction between lime, aggregates and microbes. But, the result proves its efficacy in terms of sustainability in different aggressive environment over the period. And we witness this today. In this connection, I can present my one memorable interaction with a mason twenty years back in Kolkata’s Pareshnath Temple. This temple is situated in the north-eastern part of the city of Kolkata. Fortunately, I met one mason whose grandfather was involved at the last phase of this construction of this temple. At that time, I was searching for answer to the question – How the marble statues were fixed on a marble slab, which is built more than 4 feet from ground level?
The entire structure is still lying under open sky. There is no degradation found at the junction between statue and marble slab. That surprised me. We do not have any such polymer adhesive in modern technology that can perform as an effective adhesive to fix up this type of heavy weight marble statue on a marble slab that does not show any degradation under weather action. The mason I met could not explain the chemistry. He took me to his grandfather, who could hardly hear my voice. After a few hours of discussion, the chemistry was exposed.
There was a specific mortar composition for fixing those types of heavy weight statue on marble slab. Sugar and lime were the only ingredients. Stone lime was slaked in a tank. A regular stirring of the lime slurry in tank by bull operated puddler. The top skin from the tank was collected every day before next stirring and collected in a pot. Appropriate quantity of sugar-water solution was added in the lime hydrate collecting pot. After thorough mixing of two components the mix was converted into a special type of adhesive.
The prepared adhesive is that natural adhesive which could fix up successfully the heavy weight statue on a marble slab. There is no degradation of that adhesive over the period. No weather pollution could affect this chemical bond strength. The microbial interaction is the reason behind this permanent bonding property.
Now, let us study the microbe which has functioned in this adhesive chemistry. The metabolic property of Sporosarcina pasteurii precipitates calcium carbonate which, forms as calcite. Its potentiality is already investigated by today’s scientists. This is called microbial mineral precipitation or bio deposition.
It is also now studied that bacterial colony growth at higher alkalinity is practically costly relative to neutral pH. This is due to the higher energy demands of cytoplasmic pH homeostasis. In alkaline condition, Adenosine triphosphate synthesis needs adequate energy. There are three components present in Adenosine triphosphate molecule. The sugar molecule is located at the centre and the same can produce the basis of RNA, which is attached to a base. In this chemistry, the base is adenine. During reaction between lime, sugar and microbe, after certain period, the calcium hydroxide is converted into calcium carbonate with very good bond strength between lime sugar paste and marbles. This bond strength is highly durable and not affected by any type of weather action. This is the simple chemistry of that old adhesive as well as the reason behind the sustainability of the structure.
Adenosine triphosphate molecule stores and releases energy for many cellular processes.
This plays a key role in the above reaction.
A typical image of marble statue fixed on a marble slab.
We will study on:
| 1. Bacillus sphaericus |
2. Sporosarcina pasteurii, |
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| 3. Bacillus subtilis, |
4. Bacillus pseudofirmus |
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5. Bacillus pasteurii,
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5. Bacillus pasteurii,
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7. Escherichia coli,
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8. Bacillus cohnii
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9. And few other microorganisms, which have specific property on concrete. We will continue to study the behaviours and utilizations of the above microorganisms in concrete technology.
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To be continued in part XII…
