A study on the effect of aging on pmb40 and crmb55 in bituminous concrete layers

Abstract

Aging occurs in bituminous materials throughout the construction and service lifespan of asphalt pavement, and it has a substantial impact on their performance. Bitumen aging is one of the primary causes of asphalt pavement degradation. As bitumen ages, asphalt surfaces lose their capacity to alleviate tension during the cooling process, increasing the danger of cracking. The thin film oven test (TFOT) and the rolling thin film oven test (RTFOT) are two extensively used short-term aging tests (RTFOT). The rotating cylinder-aging test (RCAT) and pressure aging vessel are two extensively used tests in the long-term aging of bitumen (PAV). The suggested research includes the comparison of un-modified bitumen and modified bitumen of waste crumb rubber and plastic rubber. This research was conducted on the aging of different grades of bitumen, that are two modified bitumen, which are PMB40 & CRMB55. After the aging of the bitumen, we conducted some physical property tests on the normal bitumen and RTFOT-modified bitumen. The outcome of the testing of the physical properties was that the RTFOT modified bitumen gained more strength as compared to the normal bitumen after the testing of physical properties of bitumen (Normal Bitumen & RTFOT Modified Bitumen) prepared samples for testing the Marshall Properties. After testing, Marshall Properties’ research can conclude that the RTFOT Modified Bitumen provides more strength compared to the normal bitumen. The RTOFT modified bitumen can be used in rural areas to provide a better pavement surface and longevity of the pavement. Through the aging of bitumen, the adhesion property between bitumen and aggregate becomes strong, so that in a high traffic area, cracks do not develop easily