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Infrastructure
Mahesh

06/01/24 07:36 AM IST

Indigenous technology used in constructing roads near China border in Arunachal

In News
  • The Border Roads Organisation (BRO) has successfully utilised an indigenous road construction technology to build high-altitude bituminous road sections at the Sela tunnel and LGG-Damteng-Yangste (LDY) road near the India-China border in Arunachal Pradesh.
REJUPAVE Technology
  • REJUPAVE utilizes several innovations to overcome the difficulties posed by frigid conditions.
  • First, it increases the heat retention properties of bituminous mix by coating the aggregate mix with special hydrocarbon-based additives. This allows the mix to stay workably hot even during extended transportation times from the hot mix plant to distant work sites.
  • Second, it allows a unique construction sequence called Pre-Fab paving where a base layer is paved and allowed to completely cool and set prior to overlaying with the top hot bituminous layer.
  • Finally, it utilizes special dominant stone skeleton gradations which have better resistance to deformation under rolling/compaction at relatively cold temperatures, allowing for easier placement and compaction.
Concerns
  • Construction and maintenance of high-altitude bituminous roads under the low and sub-zero temperatures in Arunachal Pradesh has always been a challenge for Border Roads Organization.
  • Most bituminous road construction grinds to a halt or faces delays during the winter months.
  • The production of hot bituminous mix for paving requires heating to 160-170°C in the hot mix plant. Additionally, the mix must remain sufficiently hot during transport to the work site for proper compaction and durability.
  • But the increased travel time down hilly roads often causes the mix to cool too rapidly before paving can begin.
Benefits
  • The use of 'Rejupave' technology will not only help the BRO to construct roads at sub-zero temperature but also bring down the greenhouse gas emissions in the pristine eco-sensitive mountainous environment of Arunachal Pradesh.
  • Rejupave' asphalt modifier in cold climatic regions will have improved long-term durability and better resistance to thermal cracking under low-temperature conditions.
  • Building a robust road infrastructure at a faster pace on the India-China border is one of the top priorities of the central government to improve the operational capacity of the defence forces.
Source- India Today

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