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  Scopus ID: 21100926589

A Study of Air Voids Variation with Compactive Effort in Asphalt Mixes

Prahallad Bangalore Satyanarayanachar, Jaya Raghuveer Shinganmakki, Mohan Murugan and Swathi Jayanna

Abstract

This paper envisages a comprehensive study on the air voids (Vv) in asphalt-aggregate mix BC Grade-II and effect of varying the compaction levels on the mix performance and air voids. The study dwells on volumetric analysis as carried out on laboratory samples and an attempt is made to measure the percentage air voids at a nano-level by image processing using MATLAB. The motivation to this research work is to understand and determine the % air voids which is one of the most critical physical properties of any asphalt mix design with variation of compactive effort. Three levels of compaction, involving 150, 200, and 250 gyrations each, were adopted in this investigation. It is observed that density and stability peaks at 200 gyrations with voids varying from 3 – 5% which is in the acceptable range of volumetrics. A marginal decrease in the voids as obtained from image processing is observed which could be attributed to method divergence and needs careful consideration.

Published on: October 19, 2023
doi: 10.17756/nwj.2023-s3-091
Citation: Satyanarayanachar PB, Shinganmakki JR, Murugan M, Jayanna S. 2023. A Study of Air Voids Variation with Compactive Effort in Asphalt Mixes. NanoWorld J 9(S3): S496-S499.

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