TA592 : The evaluation of using coal in asphalt mixture to investigate the moisture sensitivity and healing of asphalt
Thesis > Central Library of Shahrood University > Civil & Architectural Engineering > MSc > 2021
Authors:
Mohammad Yousefi Moghaddam [Author], Sayyed Ali Hosseini[Supervisor]
Abstarct: Asphalt pavements need maintenance and repair over time, during service life. Pavement failures are caused by factors such as traffic load, temperature, humidity, etc. that ignoring the above can exacerbate these failures. In this research, we have tried to produce an environmentally friendly asphalt mixture that has the ability to repair the damages, by using the self-healing properties of the asphalt mixtures and waste materials. For this purpose, two types of additives (coal, waste, and edible oil waste), which are themselves industrial waste and have not been used in asphalt repair. They have been used to improve the self-healing process and also improve the environment. To find the appropriate additive, in addition to environmental issues, it must be considered that the additive can be heated by microwaves. Coal waste and waste cooking oils are two additives that, while economical, due to their nature, can cause temperature rise by microwaves and cause a self-healing process in asphalt pavement. The samples made by adding 20% coal waste as a substitute for fine aggregate materials and 5% of waste cooking oils (baxsed on bitumen weight), asphalt mixture has healed 50 and 54% respectively and it's rupture improved16% by adding 20% coal waste compared with control samples. Also, the moisture sensitivity index was obtained for the sample containing 20% coal waste and the sample containing 5% waste cooking oil, which are optimal samples Also, the moisture sensitivity index was obtained 76 and 77 respectively for the sample containing 20% coal waste and the sample containing 5% waste cooking oil (optimal samples in term of healing) that is acceptable in term of moisture resistance.
Keywords:
#self healing #waste oil #coal waste #moisture sensitivity #3point bending test #hot mix asphalt Keeping place: Central Library of Shahrood University
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