Effect of adding plastic waste to bituminous mixtures consisting of (Natural coarse aggregates and fine recycled concrete aggregates')

Abstract

 The issue of waste recycling of all its sources and forms is an important issue and a demand sought by most countries of the world in order to support and supplement the sustainable development process. Our research focused on the use of two different types of waste in the design of hot mix asphalt: The first type: Concrete waste used as a main component in the mixture, in addition to natural aggregates and asphalt material. The second type: plastic waste used as additives in order to improve the specifications of the studied mixture, and we used High Density Polyethylene (HDPE) as an example of this waste. And we adopted a specific methodology in the treatment of this waste, through which we reached the result of the research according to which the addition of HDPE to the asphalt mixture consisting of (natural coarse aggregates and recycled fine aggregates) has increased the efficiency of the asphalt mixture so that the ratio of 0.33% of HDPE) led The stability increased from 1113 kg to 1586 kg, about 43%, and the density increased from 2.276 g/cm3 to 2.314/cm, up to 1.7%. As for the air spaces, it decreased in the mixture from 5.65% to 4.056%, up to 28%, and the flow value ranged between 3 and 4 mm, from the above, we conclude that the addition of HDPE to the hot asphalt mixture by the dry method has a positive impact on all properties of the asphalt mixture, and therefore it is considered a good application in the asphalt mixtures used in our research.