|
Vishvas Khandelwal
Er. Deepak Mathur
Keywords:
Bitumen, Marshal Stability, IIT Pave Software, Pavement Design.
Abstract:
In India, significant highways are commonly built with Dense Bituminous Macadam (DBM) or Bitumen Concrete (BC) with mix of bitumen generally prepared on Marshall method- which is a compromise method which on one hand balances aggregate size gradation and on the other hand the quantity of bitumen. The study revealed that air voids were 4.020% for VG-30 and 4.507% for VG-40, with VG-40 consistently showing higher Marshall stability despite both having the same optimum binder content (4.25%). Interestingly, VG-40 achieved its maximum stability at 4.50% binder, outperforming VG-30 at that level. Stability was observed to increase with binder content before declining. Using the Marshall Mix Design Method for Dense Bituminous Macadam (DBM-I), VG-30 and VG-40 were evaluated for performance under heavy loads. Results showed VG-40 provided greater durability and resistance, with fatigue and rutting lives of 38.42 msa and 2596.96 msa compared to VG-30’s 30.92 msa and 1719.62 msa. A cost comparison showed negligible difference, with VG-30 at ₹2,08,001 and VG-40 at ₹2,09,876. Given its better stability, endurance, and suitability for Indian climatic and traffic conditions (as per IRC: 37-2002), VG-40 is recommended over VG-30 for road construction under homogeneous traffic flow.
|
|
International Journal of Recent Research and Review
ISSN: 2277-8322
Vol. XVIII, Issue 2
June 2025
|
PDF View
PUBLISHED
June 2025
ISSUE
Vol. XVIII, Issue 2
SECTION
Articles
|
