Abstract
The aim of this paper is to study the feasibility of using an electrolytic manganese residue (EMR) as modified asphalt. In this paper, after grinding the electrolytic manganese residue (EMR) into asphalt, the electrolytic manganese residue‐ (EMR‐) modified asphalt was prepared with different mix ratios. The three major indicators of the modified asphalt were studied, and its modification mechanism was studied by differential scanning calorimetry, infrared spectroscopy, and atomic force microscopy. The adhesion force, surface energy, and dissipation energy of the asphalt before and after modification were analyzed by a force curve. The results show that the surface energy of the electrolytic manganese residue (EMR) is increased after grinding, the high temperature performance of the asphalt is improved, and the temperature sensitivity of the asphalt is decreased; however, the low‐temperature performance is not improved obviously. When the powder oil ratio is 9%, the comprehensive performance of the asphalt is the best. The results of the infrared spectrum analysis show that the mixture of the electrolytic manganese residue (EMR) and asphalt does not produce new functional groups, and thus, the preparation method is a physical modification method. The differential scanning calorimetry (DSC) results show that the electrolytic manganese residue (EMR) can enhance the high‐temperature stability of asphalt. It is found that the stability and antideformation ability of the modified asphalt improved.
Highlights
Manganese is widely used in steel, nonferrous alloys, battery materials, the chemical industry, and agriculture [1,2,3,4]
Qin et al [14] discussed the influence of electrolytic manganese slag on the road performance of an asphalt mixture. e results show that the high-temperature stability performance and corrosion resistance began to significantly increase by adding electrolytic manganese residue (EMR)
When the powder:oil ratio reaches 9%, the decrease in the amplitude of the high temperature value is larger than that obtained for the other powder:oil ratios, and the effect of increasing the powder:oil ratio on the needle penetration value is not obvious. e penetration index PI, the equivalent softening point T800, the equivalent brittle point T1.2, and the plastic temperature range ΔT are calculated by linear regression of the one-dimensional first-order equation, which was combined with the penetration values for a series of temperatures. e penetration index PI reflects the degree of penetration changing with temperature. e higher the PI, the lower the temperature sensitivity of asphalt
Summary
Manganese is widely used in steel, nonferrous alloys, battery materials, the chemical industry, and agriculture [1,2,3,4]. China is the world’s leading producer of manganese. In 2018, China’s production capacity of electrolytic manganese residue (EMR) was 2.26 million tons, and the actual output was 1.4 million tons, accounting for 97% of the total output of the production capacity of electrolytic manganese in the world. Electrolytic manganese residue (EMR) is acid leaching slag produced in the process of electrolyte preparation, and it is the key pollutant generated by the electrolytic manganese industry. 8–10 tons of electrolytic manganese residues (EMRs) will be produced for every 1 ton of manganese produced. The amount of electrolytic manganese residue (EMR) in China has exceeded 100 million tons, with an annual increase of more than 10 million tons. By improving the technology level of a harmless treatment and utilizing electrolytic manganese residue (EMR), reducing the storage and risk of electrolytic manganese residue (EMR) by scientific and reasonable means is being widely studied [5,6,7,8]. erefore, the effective
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