Performance Evaluation of Cement Grouted Bituminous Mix with Various Bituminous Binders

Cement Grouted Bituminous Macadam (CGBM) contains high void bituminous mix incorporating proper stone on stone contact for interconnectivity between voids, which eventually leads to 25% to 35% air voids in the bituminous skeleton. The bituminous mix will assure the flexibility, whereas, stiffness will be assured by grout, thus making it a semi-flexible layer. In this study, an attempt was made by CSIR-Central Road Research Institute, New Delhi to develop high void bituminous mix having volume of voids in between 30% to 35 % was prepared with different grades of paving bitumen such as VG 30, VG 40 and PMB 40 at optimum content and then filled with grout (for full depth penetration) to make it a composite wearing course. Mix with VG 30 was the reference mix and properties of this mix were compared with a Bituminous Concrete (BC), which is dense graded. The mechanical properties of the cement grouted composite course with different grades of paving bitumen was incorporated by performing tests such as marshal stability, compressive strength, Indirect Tensile Strength (ITS) and Resilient Modulus (ITSM). Whereas, performance characteristics were evaluated by performing Moisture I nduced Susceptibility (MIST) and durability. A test section of CGBM has also been laid on site and is being monitored routinely. It was also inferred from the results that this semi-flexible layer possesses better resilient modulus, ITS and stability as compared to conventional Bituminous Concrete (BC) course. CGBM shows a better load carrying capacity although lesser crack resistance and durability due to the brittle nature of the mix. It also shows less temperature susceptibility as compared to BC and full depth of grouting was observed in the field core samples.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1790571
• Supplemental Notes:
  • Abstract reprinted with permission from the publisher.
• Authors:
  • Shukla, Manoj
  • Bharath, G
  • Bhowmik, Pritam
  • Nagabushana, M N
  • Chandra, Satish
• Publication Date: 2020-9

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 25-44
• Serial:
  • Indian Highways
  • Volume: 48
  • Issue Number: 9
  • Publisher: Indian Roads Congress
  • ISSN: 0376-7256

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Bituminous binders; Cement grouts; Materials tests; Pavement performance
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01754587
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 13 2020 9:17AM