• PRITESH SANDIP PAGAR
• PRAVIN M WALE
• SHUBHAM DIPAK PAWAR
• ATHARV MAHAJAN
• PRANAY DIPAKRAO NILAWAR

India is a rapid urbanizing country. Due to overall development new roads are being constructed for ever increasing population. Density of vehicular traffic increases day by day. The wear and tear of tyres from these vehicles are undoubted. So, many scrap tires are being generated. Many wastes and worn out tires are 15-20% each year. The abundance and increase of waste tyre disposal are a serious problem that leads to environmental pollution. Crumb rubber obtained from shredding of those scrap tires has been proven to enhance the properties of plain bitumen since the 1840s. As a first part of this study, an attempt was made to assess the stabilization of the bitumen by performing basic tests such as Penetration Test, Ductility Test, Softening Point Test. Marshall Values, namely Marshall Stability Value, Marshall Flow Value, Voids present in air, Voids in Aggregates and Voids in Bitumen, determined from Marshall Stability Test, serve as the benchmark values to assess the quality of Bituminous Concrete. The design and performance of Bituminous Concrete mainly depends upon the quality and percentage of binder used. Experimental investigations were undertaken to check the pavement worthiness of these mixes. So, the results show that Penetration values and softening points of plain bitumen can be improved by modifying it with addition of crump rubber. Also, Optimum binder content for conventional bitumen was found to be 4.7% and 4.5% for Grade VG10 and VG20 respectively. Optimum value of crumb rubber in CRMB was found to be 10% for Grade VG10 as well as VG20. Using waste rubber reduces threat to environment and improve the road quality

Crumb Rubber, Marshall Test, Flexible Pavements, Wet Process, Dry process

"A STUDY ON PERFORMANCE OF CRUMB RUBBER MODIFIED BITUMEN BY VARYING THE VISCOSITY GRADES OF BITUMEN ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.10-15, June-2019, Available :http://www.jetir.org/papers/JETIR1906C03.pdf

"A STUDY ON PERFORMANCE OF CRUMB RUBBER MODIFIED BITUMEN BY VARYING THE VISCOSITY GRADES OF BITUMEN ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp10-15, June-2019, Available at : http://www.jetir.org/papers/JETIR1906C03.pdf