Study on the Physical, Chemical and Nano-Microstructure Characteristics of Asphalt Mixed with Recycled Eggshell Waste

Guanyu Ji, Xuancang Wang, Yuchen Guo, Yi Zhang, Qinglian Yin and Yaolu Luo
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Guanyu Ji: School of Highway, Chang’an University, Xi’an 710064, China
Xuancang Wang: School of Highway, Chang’an University, Xi’an 710064, China
Yuchen Guo: School of Highway, Chang’an University, Xi’an 710064, China
Yi Zhang: School of Highway, Chang’an University, Xi’an 710064, China
Qinglian Yin: Municipal Administration Station, Jinzhong 031100, China
Yaolu Luo: School of Highway, Chang’an University, Xi’an 710064, China

Sustainability, 2021, vol. 13, issue 20, 1-18

Abstract: Green economy is a major them of sustainable development. The application of biological waste in engineering is conducive to green development. This study reveals the effect of recycled eggshell waste on the physical and chemical properties as well as nano-microstructure characteristics of asphalt. The hardness, thermal stability and ductility of asphalt were explored by the penetration, softening point and ductility tests. The distribution and relative content of protons in asphalt were revealed by nuclear magnetic resonance hydrogen spectrum ( 1 H-NMR). The microscopic characteristics of the particle morphology and surface structure of the eggshell powder were explored by scanning electron microscopy (SEM). An atomic force microscope (AFM) was used to analyze the evolution laws of asphalt nano-microstructures. The experiment results indicate that (1) the eggshell waste increases the hardness, thermal stability and reduces the ductility of asphalt; (2) the chemical environment in which the protons of the eggshell waste asphalt are located and the H index have no obvious changes; (3) the eggshell powder is characterized by a rough, wrinkled, porous and loosened structure; (4) the nano-microstructure of eggshell waste asphalt exhibits “bee-like structures”, and the different proportion of eggshell waste changes the maturity, size and quantity of the “bee-like structures” and roughness, which can be attributed to the interaction of the asphaltene-waxiness system.

Keywords: eggshell waste; asphalt materials; physical and chemical properties; nano-microstructure (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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