Dr Gopal Rai, CEO, Dhirendra Group Of Companies elucidates on the company´s operations, its projects and future plans.
Introduce us to your solutions offered for concrete structure in India.
As a specialised engineering and contracting company, we provide one stop solutions for repair and rehabilitation of structures using carbon fiber reinforced composite system.
This well-researched technology is economical, environment-friendly and less time-consuming in rehabilitating the structures.
Which are your current ongoing projects for which you are offering your services?
Our cliental base is spread across the construction and engineering domain. It includes government, public sector industries, private sector and independent trusts.
In the government sector, we are working with Military Engineering Services (MES) under Ministry of Defense, National Highways Authority of India (NHAI) under ministry of Surface Transport, Indian Railway under the ministry of Railways, HPCL-Public Sector undertaking. In the private sector, we have executed works for Reliance Industries, Infosys, Larson & Tubro, etc. We have also undertaken rehabilitation works for JNPT, Sapthshrungi Ghad Trust, independent business houses, leading builders and devlopers.
Does specialised business or turnkey contract contribute maximum to the company´s overall business?
As this technology is based on American ACI codes, we have to develop in-house capabilities for executing the structural design and production of construction chemicals required for application of fibers and fiber composites. Validation of this technology can be best expressed by the two projects we have executed. These include:
(a) Strengthening of Mithi River Bridge Project.
The Mithi River crosses the taxiway at Mumbai International Airport. A bridge has been constructed over the river over which the aircraft travels while moving for take off. The bridge consists of 27 heavy Girder spanning 35 m x 70 m long. There is increase in the load carrying capacity of the new generation Aircraft. The load carrying capacity of the bridge was to be increased without disruption of the air traffic.
(b) Strengthening and Rehabilitation of PSC I girders of western railway bridge
Certain PSC I girder in the Western Railway section developed cracks. There was a requirement of strengthening the girder. After due scrutiny and deliberation the technology was approved by the Railways Authorities and the strengthening process is being executed and strengthening results are being validated.
Comment on the significance of waterproofing, coating and protection?
Most damage to the buildings is caused due to improper waterproofing treatment. For this, we introduced the fire-proof coating on the fibers and laminates. We also apply PU coating to withstand the weathering effect.
Introduce us to latest technology and material adopted by the company to retrofit projects.
We have introduced ´External Prestessing of carbon composites´ as a new development. We can activate the laminate system and relieve the distress structure as the load contribution is taken by the prestressed carbon laminates.
As a specialised contractor, at what stage do you get involved in any project?
We get involved whenever distress is reported by the clients. We complete the structural audits and non-destructive tests to determine the distress levels and design judiciously and efficiently. The demand for the speciality contractors will increase as the age of the structure deterioration sets in and these require effective, efficient and economical rehabilitation solutions.
What is the value addition that you bring to any project? Introduce us to your R&D team and the kind of research and Investment undertaken by you.
We analyse the project in detail before applying the appropriate technique. It´s a big challenge to restore the distress structure. We recently published technical papers and results on application of this technology in the masonry structures with a view to rehabilitate old heritage structure.
Any new introduction, expansion or growth plans on the anvil?
We are currently handling restoration and rehabilitation works in Nepal and further plan to establish our presence in South Asian market with an office in Singapore.
(Communication by the management of the company)