Construction of Sustainable Pavements Through Recycling
Dr. Ambika Behl, Dr. G. Bharath, Dr. Siksha Kar, Central Road Research Institute, New Delhi
Increased connectivity and improved road infrastructure developed in the country in the recent past has resulted in significant increase in the growth of traffic in terms of the number of vehicles and axle loads. However, the increased construction activities have resulted in an increased demand of materials and thereby allowing depletion of naturally occurring materials like stone aggregates. This has made the concerned engineers to explore the alternate methods including re-use of materials from existing pavements. Beneficial utilization of recycled materials can result in an important opportunity to save the mining and use of virgin materials, preserve energy, and save landfill space.
The main components of asphalt mixture are asphalt binder and aggregate, which have the potential to be replaced by recycled materials. The largest portion of pavement in terms of mass and volume are aggregates. The unit price of the aggregates is comparatively low with relatively low environmental impact on production. Correspondingly, because aggregate is exercised in large quantities, is non-renewable, and incapable to mine near its point of use, it can play a vital role in pavement sustainability.
Increased connectivity and improved road infrastructure developed in the country in the recent past has resulted in significant increase in the growth of traffic in terms of the number of vehicles and axle loads. However, the increased construction activities have resulted in an increased demand of materials and thereby allowing depletion of naturally occurring materials like stone aggregates. This has made the concerned engineers to explore the alternate methods including re-use of materials from existing pavements. Beneficial utilization of recycled materials can result in an important opportunity to save the mining and use of virgin materials, preserve energy, and save landfill space.
The main components of asphalt mixture are asphalt binder and aggregate, which have the potential to be replaced by recycled materials. The largest portion of pavement in terms of mass and volume are aggregates. The unit price of the aggregates is comparatively low with relatively low environmental impact on production. Correspondingly, because aggregate is exercised in large quantities, is non-renewable, and incapable to mine near its point of use, it can play a vital role in pavement sustainability.
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NBM&CW September 2019
