VI. RESEARCH WORK DONE IN ACADEMIC INSTITUTIONS RELATED TO THESIS WORK

B. PAVEMENT ENGINEERING AND PAVING MATERIALS
7. Studies on Effect of Aggregate Gradation on Fatigue Behavior of Bituminous Concrete Mixes
Date of Start

April 2005
Indian Institute of Technology, Madras (R, C)

 

Scope and Objectives

The fatigue life of a bituminous concrete mix is influenced by several factors such as bitumen type and its content and air-voids. Others factors such as temperature, frequency and rest periods of applied loads also influence fatigue life. Although the influence of binder type and content on fatigue life has been studied extensively, the effect of aggregate properties such as aggregate gradation on fatigue life has not been widely presented.

The objective of the present investigation is to study the effect of aggregate gradation on fatigue behavior of bituminous concrete mixes.

 
Methodology
(i) Literature survey

(ii) Mixture design and volumetric analysis as per ASTM D 1559.

(iii) Static indirect tensile test and the repeated load indirect tensile fatigue as per ASTM D 4123 on cylindrical specimens.

(iv) Ranking the mixes based on the fatigue life.