STUDY ON STABILIZERS FOR GRANULAR LAYERS OF FLEXIBLE PAVEMENTS A REVIEW

Abstract

Highways plays a vital role in the development and progress of any nation, which provides them access to the resources and interconnection between countries, states and cities. India is known to have one of largest highway network in the world, which transports approximately 64.5% of goods all over the country and 90% traffic passengers of the country, who uses this network to commute. The total expenditure allocated by the Ministry of Road Transport and Highways for 2023-2024 is Rs. 2.7 lakh crores, which is 36% higher than 2022-2023(1.99 lakh crores). All we need now a day is the economical and engineering approach technique to enhance durability and life of the existing roads/ highways. This study is a review of application of stabilizers for Granular Sub Base of Flexible Pavements. The main objective of this study to determine Unconfined Compressive Strength, Elastic Modulus of stabilized material prepared with different stabilizers for use in Cement Treated Sub Base (CTSB), determine optimum dose of various Stabilizers with or without cement to achieve desired strength of Cement Treated Sub Base (CTSB) and to determine the durability characteristics of the samples prepared at optimum dose. This paper deduces that many researchers used different stabilizers such as pumice, fly-ash, lime stabilized fly-ash, combined cement and bitumen emulsion, which were found suitable and effective to achieve required strength for the flexible pavements.