Roller Compacted Concrete

Rupen Patel shifts focus to assets ownership

Patel Engineering’s name is today synonymous with dams and underground works in India. The company has been at the forefront of introducing some of the advanced technologies in India such as RCC (Roller Compacted Concrete) in hydro power projects, micro tunnelling and double lake taps. Almost 90% of micro tunnelling projects in India are done by Patel Engineering or its subsidiaries. When Rupen Patel took charge of the company in 1993, it had a turnover of `60 million. But within a span of 18 years, he transformed Patel Engineering into one of the fastest growing construction companies in India with an annual turnover of around Rs35,000 million, registering a growth of 600 times amounting to a staggering 33% increase every year. After successfully executing some of the critical projects as an EPC contractor, Patel now has a different goal to accomplish. He wants to shift his focus to developing his own portfolio of assets, mainly in the power sector. The company has drawn up a plan to invest about Rs7000 crore in the power asset development through IPP (Independent Power Producer) in the next three years. With its current market cap of about Rs11,028 million, Patel Engineering wants to become a billion dollar company with sustainable profits. The infrastructure model in India is changing from pure construction to ownership. If you look at Indian infrastructure companies, they have been looking to get into project ownership. However, different companies have different strategies as some are getting into ownership of roads, whereas others are looking for water assets or power or real estate or manufacturing. So each company has its own strategy. For Patel Engineering, what we have started off with is power, so we know power best. We have been associated with the construction of almost 22% of India’s hydropower in the civil work portion since independence. Since we know power best, we decided to get into hydropower and thermal power. We should start constructing our first thermal project this year in India, which is about 1050MW in Nagapattinam in Tamil Nadu. We will also start constructing our first IPP hydro project of 140MW and then six months thereafter we will add another 40MW hydro power. So in the span of a year and a half, we should have 180MW of hydro and 1050MW of thermal power projects commissioned. We will own these projects and sell the power. Another area of ownership that we are looking at is real estate. We have a sizable land bank which is in excess of 1200 acres in Bangalore, Hyderabad, Chennai, Mumbai and other parts of India. That is one of the reasons we have got into real estate. We think lots of liquidity will come out of real estate projects, which will help us finance some of our infrastructure projects.

Northern Irish Concrete Machinery Assists in the Growing Increase ...

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Using Mobile Continuous Mixing Plants, supplied by Rapid International Ltd based in Tandragee, Co. Armagh, contractors such as Complete General Construction and Nickolas Savko & Sons, Inc., in Ohio, USA are increasingly switching over to Roller Compacted Concrete applications for highways and pavements.

The city of Columbus, Ohio has experienced a rapid growth in recent years in the use of roller-compacted concrete (RCC) for the city streets and highways since RCC construction procedures were first introduced to the area in 2001. Using Rapid International mobile continuous twin shaft plants to mix the concrete and high density pavers and rollers to lay it, Roller Compacted Concrete is becoming a popular choice for projects due to its strength, the speed of its construction and its economic value in comparison to asphalt.

For many years the city of Columbus has made use of "composite" pavement designs, where concrete is used as the pavement base, and asphalt for the pavement surface, but with the introduction of RCC, dozens of successful projects have been completed. This month contractors, Complete General Construction, have commenced work on a highway network in the city. Using a mobile continuous mixing plant, supplied by Rapid International Ltd, along with specialized paver and vibratory rollers, they have started laying the Roller Compacted Concrete which will provide long serviceability with minimal maintenance.

Why Choose Roller Compacted Concrete (RCC) over Asphalt? It also has a high compressive strength (4,000 to 10,000 psi) (28 MPa to 69 MPa) allowing it to withstand high concentrated loads and impacts from heavy industrial, military, and mining applications. Its high density and low absorption provides excellent durability, even under freeze-thaw conditions and eliminates seepage through pavement.

No Need for Forms or Finishing The high strength of RCC pavements eliminates common and costly problems traditionally associated with asphalt pavements. The RCC has the durability to resist freeze-thaw damage. The pavements will not deform under heavy, concentrated loads and do not deteriorate from spills of fuels and hydraulic fluids. They will also not soften under high temperatures.

Stages of RCC and Use of the Mobile Continuous Mixing Plant The Rapidmix mobile continuous twin shaft plant is a key machine to ensure that RCC projects are carried out on time and within budget. It produces high outputs of up to 400 and 600 tonnes from both models. It provides the mixing efficiency needed to evenly disperse the relatively small amount of water used in the mixing of Roller Compacted Concrete. Dump trucks then transport the Roller Compacted Concrete and discharge it into a paving plant, which places the material in layers up to 10 inches (250 mm) thick and 42 feet (13m) wide.

Roller-compacted concrete

Roller compacted concrete, proceedings of the symposium

Roller compacted concrete

Roller compacted concrete dams, proceedings of the fourth International Symposium on Roller Compacted Concrete (RCC) Dams, 17-19 November 2003, Madrid, Spain

Roller compacted concrete, design, construction and performance of Copperfield Dam