A Review on the Enhancement of Asphalt Cement using Different Additives

Abstract

Asphalt cement, commonly known as asphalt or bituminous, is one of the basic materials used to produce hot mix asphalt (HMA) for road pavements. In the past, asphalt was mixed directly with other materials to produce a conventional HMA without any modification. However, the asphalt binder has failed in many places worldwide due to climate change and various issues such as cracking, bleeding, shoving, etc. Therefore, they modify asphalt cement by using many types of additives to overcome these problems. This work aims to review these studies that have been concerned with improving asphalt cement as a pre-action before mixing it with other materials to make modified hot mix asphalt (HMA) for road pavements. The present paper reviews published studies (1978-2019). It is evident from literature survey studies that modification of asphalt cement gives more efficient, economic, and eco-friendly results.