Thickness Reduction in Flexible Pavement Using Cement Treated Base and Sub-Base
- April 7, 2018
- Posted by: RSIS
- Category: Civil Engineering
International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue III, March 2018 | ISSN 2321–2705
Thickness Reduction in Flexible Pavement Using Cement Treated Base and Sub-Base
Udhara Ashani Dewalegama#, Shivani Sharma*, S. N. Sachdeva#
#, *Department of Civil Engineering, National Institute of Technology, Kurukshetra, Haryana, India
Abstract—This paper mainly discusses the thickness reduction ina flexible pavement with cement treated base and sub-base layers.The designed road has a 7×2 m dual carriageway, assumed to be located in Kurukshetra, Haryana. The road pavement is first designed for conventional granular layers in sub-base and base of the road and then for cement treated sub-base and base using IRC recommendation given in IRC 37: 2012. The pavement is designed for both the cases for varying values of effective CBR from 3% to 15% and for various values of design traffic varying for 2 msa to 150 msa. The paper brings forth the suitability of flexible pavement with cement treated sub-base and base vis a vis the conventional flexible pavement.
Keywords—Flexible pavements, cement treated bases and sub bases, thickness comparison, pavement layers, empirical design
I. INTRODUCTION
Transportation contributes to the economic, industrial, social, and cultural development of any country.It provides movement of passengers and goods from one place to another place. Main modes of transportation in our country are Roadways, Railways, Waterways and Airways etc. Out of these Roadways allows movement of about 80% of passengers and 70% of goods in the country.Pavements can be classified in to two main categories; Flexible and Rigid pavements.
Flexible pavements are the ones which are having low or negligible flexural strength. They are flexible in their structure under loads but if the lower layer gets undulated the entire pavement gets disturbed. The load is transferred from grain to grain action and the maximum compressive stress will be on the pavement surface, so it is necessary to provide a strong layer at the top.[4]Flexible pavement consists of 4 layers; surface course, base course, sub-base course and soil subgrade.
