The white topping procedure has been in news quiet frequently in recent times. It is not surprising given the fact that roads in India are, more often than not, in need of repairs. The procedure offers multiple benefits to the problem of road rehabilitation, especially when it is a bituminous road and where it has been identified that repeated overlays have little or unviable lasting effects.
White topping can be categorised into three main heads:• White topping (WT): Usually a conventional overlay having a particular mix design for that specific project and usually about 200 mm thick• Thin white topping (TWT): This is usually about 100-200 mm thick• Ultra thin white topping (UTWT): It is sensitive and from 50 to 10 mm thick.
Several factors need to be taken into consideration before a particular type of equipment is chosen for a white topping project. These include, mix design, grading of aggregates, water-cement ratio, additives, admixtures, size of the project, and calculated adversities, among others. It would be difficult to prescribe a one quick-fix solution for all white topping requirements. This fact has been corroborated by numerous feedbacks and mentioned in the Guide to Concrete Overlays – National Pavement Technology Center, USA, September 2008.

Contact:Bharat Road Development Combines Pvt Ltd.14, Viral Apartments, Opp. Shoppers Stop, S.V Road, Andheri (West), Mumbai-400 058Ph: +91-22-65346038Fax: +91-22-26288753