Relation Between Bitumen Content and Percentage Air Voids in Semi Dense Bituminous Concrete

  • R. P. Panda
  • Sudhanshu Sekhar Das
  • P. K. Sahoo
Original Contribution
  • 13 Downloads

Abstract

Hot mix asphalt (HMA) is a heterogeneous mix of aggregate, mineral filler, bitumen, additives and air voids. Researchers have indicated that the durability of the HMA is sensitive on the actual bitumen content and percentage air void. This paper aims at establishing the relationship between the bitumen content and the percentage air voids in Semi Dense Bituminous Concrete (SDBC) using Viscosity Grade-30 (VG-30) bitumen. Total 54 samples have been collected, for formulation and validation of relationship and observed that the percentage air voids increases with decrease in actual bitumen content and vice versa. A minor increase in percentage air voids beyond practice of designed air voids in Marshall Method of design is required for better performance, indicating a need for reducing the codal provision of minimum bitumen content for SDBC as specified in Specification for Road & Bridges (Fourth Revision) published by Indian Road Congress, 2001. The study shows a possibility of reducing designed minimum bitumen content from codal provision for SDBC by 0.2% of weight with VG-30 grade of Bitumen.

Keywords

Bitumen content Percentage air voids Semi dense bituminous concrete Durability Marshall mix design Performance of flexible pavement 

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Copyright information

© The Institution of Engineers (India) 2018

Authors and Affiliations

  • R. P. Panda
    • 1
  • Sudhanshu Sekhar Das
    • 2
  • P. K. Sahoo
    • 1
  1. 1.SOA UniversityBhubaneswarIndia
  2. 2.Department of Civil EngineeringVSSUTBurlaIndia

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