Abstract
The sustainability of resources is presently a major global concern. Sustainable construction materials can be produced by applying biological waste to engineering. Eggshells, as biological waste, are usually dumped in landfills or discarded. This causes many environmental problems including malodor, noise pollution, and serious waste of resources. To solve these problems, this study combined eggshell waste with bitumen materials for bio-roads construction. This paper investigated the impact of biological waste eggshell powder on the high- and low-temperature characteristics of bitumen materials. Scanning electron microscopy (SEM) revealed the microstructure of eggshell powder. The interaction between eggshell powder and asphalt was analyzed using Fourier transform infrared spectroscopy (FT-IR). The high- and low-temperature characteristics were investigated using conventional performance tests, and dynamic shear rheometer (DSR) and bending beam rheometer (BBR) experiments. These results indicate that eggshell powder (1) has a rough and porous microstructure; (2) has no apparent chemical reaction with asphalt; and (3) improves the consistency, hardness, and high-temperature characteristics. However, it reduces the plastic deformation capacity of asphalt, and the low-temperature crack resistance of asphalt cannot be improved. The research demonstrated that the application of eggshell powder in asphalt is feasible and has long-term resource and environmental advantages.
Highlights
Received: 17 March 2021Accepted: 13 April 2021Published: 17 April 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Licensee MDPI, Basel, Switzerland.This article is an open access articleWith the increase in population and the acceleration of industrialization and urbanization, abundant solid waste is being generated [1]
This study reveals the high- and low-temperature characteristics of bitumen materials mixed with waste eggshell powder
Scanning electron microscopy (SEM) tests showed that eggshell powder has a rough and porous microstructure
Summary
Received: 17 March 2021Accepted: 13 April 2021Published: 17 April 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Licensee MDPI, Basel, Switzerland.This article is an open access articleWith the increase in population and the acceleration of industrialization and urbanization, abundant solid waste is being generated [1]. Of these solid wastes are not properly treated, which causes air, soil, and water pollution, as well as global warming, and has severe implications for the sustainable development of the society and economy. Social and economic development will lead to the production of solid waste. Economic development needs a lot of energy [3]. For the sake of building a green and sustainable development condition, it is necessary to effectively manage waste, and to produce more energy to meet the growing demand [3,4,5]. Upcycling is an effective means for sustainable waste management [6]. Municipal waste has been widely used in building materials, and remarkable results have been achieved [7].
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