Modified Bitumen with Addition of Fly Ash in Different Proportions

Abstract

Modified Bitumen with addition of fly ash  is a material used in road construction and roofing. Fly ash is  a byproduct of coal combustion and has been utilized in  various construction applications due to its properties like pozzolanic activity and low cost. The addition of fly ash to  bitumen increases its strength, durability and reduces its  temperature sensitivity. In this study, modified bitumen was  prepared with different proportions of fly ash to investigate  its impact on the properties of bitumen. The results showed  that with increasing fly ash content, the viscosity of bitumen  decreased and its softening point increased. Additionally, the  addition of fly ash improved the resistance to rutting, fatigue  cracking and low-temperature cracking. Moreover, the  results indicated that the optimum amount of fly ash that  could be added to bitumen is between 5-10%. Beyond this  limit, there was a significant reduction in the properties of  modified bitumen. Furthermore, the addition of fly ash also  improved the environmental performance of modified  bitumen as it reduces the generation of greenhouse gases.In  conclusion, the addition of fly ash to bitumen is a promising  technique for improving the properties of bitumen. The  modified bitumen with fly ash can be utilized in various  applications such as road construction, roofing and paving.  However, it is important to note that the optimum amount of  fly ash that could be added to bitumen should be determined  based on the specific application requirements.