Rehabilitation of concrete roads

With the increase of axle loads and volume of traffic, it is becoming necessary to strengthen the existing roads to suit present day traffic requirements. This aspect is much more relevant in developing countries like India. Although the majority of kilometres of the existing road network are flexible pavements, many kilometres are of cement concrete (cc). Some of these cc pavements constructed in the early 1960's are 200 mm thick, while other cc pavements constructed earlier than this are only 100 to 150 mm thick. Strengthening of cc pavements has always been a matter of differing opinion. Earlier, thin flexible overlays were provided to these roads in the hope that they would stand the traffic requirement of that time. However, reflection cracking and slippage of the overlay material has been a cause of concern to road engineers. It was believed that the only solution to the problem of strengthening cc roads was to break the cc and relay it as a flexible pavement. This procedure is quite tedious and involves much time and money, and it has often been the cause of public criticism. A literature survey and field studies were conducted and it was concluded that cc pavement can be strengthened by flexible overlays, if they are free from defects such as rocking and pumping. The thickness of flexible overlay required should be greater than 150 mm excluding the wearing course. A significant improvement has been gained by the provision of a tack coat over the existing cc surface before laying the flexible overlays in order to avoid slippage. It has also been observed that the use of larger size stone ballast gives better results, because the travel path of reflection cracks increases.

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Agarwal, P D
  • Datta, D
• Conference:
  • Australian Road Research Board (ARRB) Conference, 13th, 1986, Adelaide, Australia
• Publication Date: 1986

Language

• English

Media Info

• Pagination: 267-74
• Monograph Title: Study on bitumen with a view to improving road surfacing
• Serial:
  • Volume: 13
  • Issue Number: 3

Subject/Index Terms

• TRT Terms: Bituminous pavements; Concrete pavements; Developing countries; Pavement layers; Pavement maintenance; Pavements; Tests for suitability, service and quality
• ATRI Terms: Bituminous pavement; Concrete pavement; Developing countries; Pavement layer; Pavement maintenance; Pavement testing
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 01427396
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Aug 24 2012 2:17PM