Site Test for M Sand

Sand is a basic raw material used in the construction industries. It is fine aggregate having the particle size between 150 microns and 4.75 mm. Silt content is a super fine material which is less than 150 microns / 0.15 mm in Size. The slit content should not be more than 6% of the total volume of the sand.

Tests for finding quality of sand on site

Excessive clay / Silt

Presence of clay in Sand makes the sand cohesive, the good quality of sand should have less percentage of clay in it.

Presence of excessive clay can be determined in two ways

  1. For the testing, the presence of clay in the sand, take a glassful of water and add some sand to it. Shake it vigorously and allow the sand to settle. Check whether an apparent layer is formed on the sand. Good quality of sand should have less than 8% of clay in it.
  2. Hold some dry sand and drop it. If the Sand adheres to your palm, then it has Clay.

Presence of Organic Impurities in Sand

For detecting the presence of Organic impurities in fine aggregate. Take a Sample of sand and add it in Sodium Hydroxide [NaOH] Solution, Stir the solution for few minutes, if the color of solution changes to brown, then the sand has organic impurities which are not suitable for construction. Good quality of sand shows a lighter color when it is mixed with NaOH solution.

Presence of Excessive moisture content / Bulking of Sand

Presence of excessive moisture content in sand causes increases in the volume of sand. Fine Aggregate Which contains more than 5% of moisture content in its volume is not suitable for construction purposes. For accurate conclusions, fineness modulus test and salt content by weight are suggested for large projects.

Tavara Mines and Minerals rednosed name for M Sand Manufacturer in Bangalore. Check M Sand Test Report for Tavara here – Tavara Test Report

Tagged :

New Construction Techniques 2019

The tech industry is promoting innovation in construction on an ever greater scale, bringing to the table new solutions designed to enhance productivity, improve the functionality of materials, and offer wider choices to both crew and client. With an eye toward growth, progress, and sustainability, here are five innovations in construction to keep an eye on in 2019.

Construction materials have come a long way over the years. From the use of timber and concrete to cigarette butts and cardboard, builders are looking for newer and more effective materials for their projects. Builders are taking advantage of innovative solutions that will reduce the time and cost of designing new structures.

Green Design and Construction Technology

Also continuing into 2019 is the trend toward green design and technology in construction. Every construction project is expected to increase their participation through green design aiming towards the LEED certification. This trend, which started some years ago, will continue to rise in 2019. The essence of green design and construction is the effort to create resource-efficient and environmentally responsible construction projects. It includes every aspect of construction, including planning and design, demolition, and clean-up.

With 20 percent of global emissions directly attributable to the construction industry, green building practices can go a long way toward supporting, rather than harming, the environment—especially at a time when aging buildings make new construction so critical.

The Brave New World of Robo Builders

In line with timber towers is the invention of robots that assemble complex wooden structures rapidly and with far greater ease than their human counterparts ever could. These machines, which look and function much like the large robotic arms used in vehicle manufacturing, follow programmed algorithms to cut wood and position it for the completion of sophisticated structures. Humans lend a hand in securing the structures with nuts and bolts once everything is in place. However, due to the precision of the manufacturing and assembly, the metal plates and bolts typically required by architects to reinforce beams are not needed here, thereby reducing cost as well.

Building Information Modelling (BIM)

There is one single tool that can increase effectiveness and collaboration like no other tool: BIM (building information modelling). BIM is a technique of creating computer representations of buildings, roads, and utilities. It is used by architects and engineers to predict job costs and show how building materials and structures will hold up over time. It is increasingly required for many RFPs and government agencies, who insist on understanding the issues a project will face before investing. Building owners can also use BIM to develop maintenance schedules.

BIM not only increases collaboration but also reduces construction costs and promotes a safer, faster building process and fewer safety incidents. BIM will soon be a requirement of construction and building codes. If you are not BIM-ready, try to get a sub-contractor that can become your BIM expert.

Modular, Prefabricated Buildings

In 2019, construction with modular, prefabricated building units will gain more followers and fans in the real estate and construction industries. In residential building, modular constructions can offer particular benefits to young telecommuting professionals and millennials who seek new housing outside metro areas, in remote suburbs and rural areas where they can enjoy closer contact with nature.

Modular homes constructed off-site reduce the impact to the landscape and offer a faster way to develop residential areas. Construction of modular components can be underway offsite even while permits are being secured and financing is being finalized. Because components are built in factory environments, weather delays are virtually non-existent. And there is very little waste since scraps and leftover materials are immediately recycled. Modular homes tend to be cheaper and quicker to build, as crews are familiar with assembly methods.

Some modular homes can even be moved from location to location as owners follow employment opportunities or seek new neighbourhood environments.

The Internet of Things (IOT)

As we see a continued rise in adoption of data-driven technology in construction, we will also see innovations in how this technology is utilized to create new efficiencies. Embedded sensors on a connected worksite create huge opportunities for collecting and managing data on safety, material performance, and operational workflow, just to name a few. Smart devices and wearable construction technology, as well as sensors and on-site cameras can be tied in to construction management software and give a much clearer picture of building progress and real-time status reporting.

This integration will affect not only the flow of a project, but also provide vital data that can be examined after handover to become a part of operational management. Sensors that provide information on environmental conditions and structural performance are of particular importance in this area.

Programmable Cement

In an effort to make concrete structures more durable, programmable cement can be used to achieve water and chemical resistance. Programmable cement is essentially a form of cement that can be designed to achieve less porous and more chemically resistant shapes. These innovative shapes limit damage to concrete and increase the durability of structures.

Self-healing Concrete

Cracks in concrete have been a long-standing problem in the construction industry. A small crack often becomes larger and wears away the structure over time. Self-healing concrete can be used to solve this challenge. This innovative building material consists of living spores and water capsules within the mixed concrete. When damage occurs, the capsules crack open and mix with water. This mixture produces calcite, a material that fills the damaged area and later solidifies in place. 

By using self-healing concrete, structures such as tunnels, buildings and bridges will cost less to build and maintain. 

Illuminating Cement

Illuminating cement is a new material that will influence road construction in 2019. This cement traps light from the sun during the daytime and releases it at night. 

Illuminating cement creates a glowing surface that allows builders to save on lighting costs. This material can also be used to light up swimming pools, footpaths and roadways; reducing dependency on street lighting. 

Air-cleaning Bricks

New construction materials are also improving the quality of indoor air. Because air quality is always a top concern for commercial structures, using passive air filtration systems can significantly benefit builders and building owners. 

Air-cleaning bricks are innovative construction materials that can filter incoming air to remove pollutants. These bricks are placed on the outside of a building and they filter heavy air particles as air flows indoors. 

Cigarette Butts

Cigarette butts are another innovative material that can be used in construction. They can be infused into bricks, where they provide durability and efficiency to building materials.

Because cigarette butts result in millions of tons of waste every year, using them as a construction material helps clean up the environment and reduce material costs. The bricks made from cigarette buts are often lighter, more convenient to use, and highly energy efficient.

Mass Timber

Over the years, the use of timber steadily decreased in commercial construction projects. Concrete and steel have been the preferred option due to their strength and fire resistance. However, timber is making a comeback in 2019 in the form of mass timber, which is essentially solid wood that has been laminated and panelised to increase strength and durability.

Using mass timber allows builders to lower the carbon footprint of buildings by trapping carbon from the atmosphere, and to reduce the cost of building materials.

 M Sand in Bangalore – Tavara mines & Minerals

High Quality M Sand Manufactures and M Sand Suppliers in Bangalore

Tagged : /

How manufactured-sand help reduce indiscriminate sand mining and saving ecosystems

River beds

There is an urgent need to protect the environment by protecting the river beds, but the construction industry needs sand. Manufactured sand is the solution to this problem. The manufactured sand industry has potential in the region that boasts of several blue metal quarries. Blue metal is the raw material for manufactured sand. Listing out the environmental degradation caused by exploiting river sand, 18 lakh wells in the southern region turned useless since groundwater level dipped alarmingly as river sand, the natural aquifer, was depleted from rivers.

Water table, which was at 50 ft or so, fell to 600 ft in Madurai. There is no water even for agriculture purposes. The government agencies should start taking up construction activities using manufactured sand in place of river sand. Manufactured sand is superior to river sand since the former has better grip in concrete and free of silt and organic impurities. Many big projects have been carried out with the use of the manufactured sand. Public should be sensitised about using it in place of river sand.

M Sand (Manufacture Sand) and its Advantages

What is manufactured-sand, or artificial, or engineered-sand, as it is described? M-sand is produced by passing boulders and stones through a series of jaw and cone crushers for size reduction and then fed into vertical shaft impact (VSI) crushers where they are pulverized further to the size of sand. The VSIs crush them to cubical and angular particles. In certain markets, this is flogged off as m-sand; it’s a masquerade. This process is incomplete From the VSI stage, the sand has to further go through a process of elaborate washing to remove dust and flaky particles Washing in a hydro cyclone process is apparently critical to the entire sand manufacturing process as it effectively removes excess ultrafine of minus 75 microns from the feed material. Ultrafine can be detrimental to the making of concrete.

Manish Bhartia, MD of CDE Asia, has introduced an array of high-performance crushers and washers in India over the past few years. He says the sand thus washed and dewatered is impurity free and Ready-Mix Concrete (RMC) ready. His manufacturing unit in Kolkata is jointly promoted by CDE Global of the UK and the Bhartia family.

Apparently these machines with washers that also help in dousing dust at production sites are a class apart from the crude equipment used at stone quarries.
That the concept of manufactured-sand is gaining traction can be gauged from the fact that, since 2007, when Bhatia began operations, he has been involved in over 60 crushing projects. One of his anchor clients is the Bhopal-based Dilip Buildcon which operates a cluster of 15 plants across the region.

Bhartia estimates that the collective output of msand across all plants would be merely 10 million tonnes per annum (Mtpa). “Of this barely 25 per cent of manufactured-sand produced comes into the open market,” he says. The rest are consumed in-house by large developers and RMC units. The demand for sand is estimated at 500 Mtpa. The nascent industry is just about scratching the surface.

While m-sand gains traction in the market, the idea of abolishing the stone quarry bit in the system seems quite enticing. This is precisely what IL&FS Environment, a subsidiary of IL&FS, one of India’s leading development and finance companies, is doing.

IL&FS is propagating the use of construction and demolition (C&D) waste for the production of m-sand and other aggregates. It is operating India’s first C&D waste recycling facility in Delhi with a capacity of 2000 TPD.

C&D waste is a huge problem in our metro cities. Delhi alone generates over 5,000 tonnes of C&D waste every day. Where does this waste go? It is surreptitiously dumped along roadsides or in water bodies, and in Mumbai, into stretches of mangroves along the seashore. The recent flooding of Chennai can also be partly attributed to this trend.

In Navi Mumbai, if construction debris is cleared out from all the stretches it is dumped in, the city can recover land worth Rs 6,000 crore.

L&FS Environment claims that its C&D waste management facility has helped save over 25 acres of land valued at Rs 250 crore. Its plant has processed over 20 lakh tonnes of C&D waste since it started operations and has recovered/recycled 95 per cent of the incoming waste. Enthused by the results of the pilot C&D recycling plant, several agencies including the PWD, Delhi Metro and municipal bodies have commissioned IL&FS Environment to setup and operate similar plants.

The only impediment to the adoption of recycled-sand (r-sand) has been the absence of clear government guidelines on the usage of recycled products as in the US or the EU. This has been addressed to an extent now: the Delhi government has issued an advisory to all departments to use a minimum of 10 per cent of recycled C&D waste in construction. It’s about time to craft national guidelines on C&D waste.

While the transition from river–sand to manufactured– sand and recycled–sand is a good augury, there are environmental issues that remain to be addressed. “It is essential to ensure that these new genre plants adhere to strict pollution norms. Communities living near or around these plants are already restive,” says Sumaira Abdulali of the Mumbai-based Awaaz Foundation that has been campaigning against illegal sand mining for years.

A few plants on the outskirts of Pune have already been forced to shut down by agitating farmers.

So, Start using M Sand for Constructions Which has more advantage than River Sand

Tagged :