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原文传递 Thin White Topping Overlay: Insights from an Experimental

题名：	Thin White Topping Overlay: Insights from an Experimental
其他题名：	1.Balbo,J.T.,Pereira,D.S.,and Severi,A.A.(2001),"Behavior and Performance of UTWT on Thin Asphalt pavements",Proceedings of 7th International conference on concrete pavement,pp.825-838,Orlando,Florida,USA.
正文语种：	英文
作者：	Vishal R. Thombare
关键词：	Thin White Topping;Ultra-Thin White topping;Bituminous Concrete;Fast track construction;High early strength concrete;Thermocouples
摘要：	At present many metropolitan cities in the country including Mumbai face the problem of addressing severe pavement distresses in the old flexible (bituminous) pavements after each monsoon incurring huge expenditure. Though cement concrete pavements, because of their long life and superior perfonnance, greatly reduce the maintenance expenditure, often due to initial investment constraints this option is not chosen. There is need for development of new and innovative pavement repair and strengthening strategies which are cost effective and less maintenance intensive. One such innovative pavement strengthening strategy is to provide Thin or Ultra-Thin white topping overlay. Ultra-Thin White topping is a rehabilitation technique in which a 50 to 100 mm thick layer of high strength, fiber-reinforced, cement concrete is placed on a milled surface of rutted and/or cracked bituminous concrete pavement. Thin white topping can be used for thicknesses more than 100 mm. Thin and Ultra-Thin White topping deliver the performance which is almost equivalent to that of a conventional concrete pavement at a competitive price. Thin and UTWT overlays have been successfully utilized as pavements for roads with low to medium traffic. This study provides the details of investigation, structural design, mix design, construction, and instrumentation carried out for an actual thin white topping pavement overlay constructed over an existing flexible pavement for a road in Greater Mumbai. Through thermocouples installed in the pavement the temperature differential between the top and bottom of the TWT have been measured and interpreted. With the use of a specifically designed high early strength concrete it was possible to open the rehabilitated road within a week's time. Through the analysis of temperature data, it was found that the temperature differential between top and bottom of the thin white topping layer is much less than the one specified in IRC guidelines (IRC:58-2011).
出版年：	2016
论文唯一标识：	I-75Y2016V44N04008
英文栏目名称：	Technical Papers
期刊名称：	Indian Highways
拼音刊名(出版物代码)：	I-75
卷：	44
期：	04
页码：	37-51