Effect of application of metallurgical slag powders on physical and rheological properties of asphalt

•Three slags, electric arc furnace, blast furnace, and copper, were used as asphalt modifiers.•The performance of the slag-modified asphalts was characterized via physical and rheological tests.•The addition of the slags improved the short-term asphalt aging properties.•Rheological test results show...

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Veröffentlicht in:Construction & building materials 2021-07, Vol.292, p.123432, Article 123432
Hauptverfasser: Hernandez-Fernandez, Noe, García-Mejía, Tania A., Ramírez-Zamora, Rosa M., Ochoa-Diaz, Ricardo, Ossa-Lopez, Alexandra
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container_start_page 123432
container_title Construction & building materials
container_volume 292
creator Hernandez-Fernandez, Noe
García-Mejía, Tania A.
Ramírez-Zamora, Rosa M.
Ochoa-Diaz, Ricardo
Ossa-Lopez, Alexandra
description •Three slags, electric arc furnace, blast furnace, and copper, were used as asphalt modifiers.•The performance of the slag-modified asphalts was characterized via physical and rheological tests.•The addition of the slags improved the short-term asphalt aging properties.•Rheological test results showed an enhancement in permanent deformation resistance of slag-modified asphalts. Metallurgical slags are residues that are obtained in the manufacturing and smelting processes of metals, such as steel and copper. However, their use is limited because they may cause environmental problems at their disposal sites. This study aims to evaluate the effects of the addition of slag on the properties of slag-modified asphalts using three different slag proportions (3, 6, and 10% by weight of asphalt). Electric arc furnace slag, blast furnace slag, and copper slag were used to evaluate the effects of the addition of slag on their performance properties via physical and rheological tests. The results showed an improvement in the consistency of the slag-modified asphalts, decreasing the penetration rate and increasing the softening point. An enhancement in the short-term asphalt aging characteristics was also observed with the addition of slag. Finally, the rheological test results revealed an improvement in the resistance to permanent deformation with the addition of slag in neat asphalt, whereas no statistically significant results were observed when the slag content was increased.
doi_str_mv 10.1016/j.conbuildmat.2021.123432
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Metallurgical slags are residues that are obtained in the manufacturing and smelting processes of metals, such as steel and copper. However, their use is limited because they may cause environmental problems at their disposal sites. This study aims to evaluate the effects of the addition of slag on the properties of slag-modified asphalts using three different slag proportions (3, 6, and 10% by weight of asphalt). Electric arc furnace slag, blast furnace slag, and copper slag were used to evaluate the effects of the addition of slag on their performance properties via physical and rheological tests. The results showed an improvement in the consistency of the slag-modified asphalts, decreasing the penetration rate and increasing the softening point. An enhancement in the short-term asphalt aging characteristics was also observed with the addition of slag. 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Metallurgical slags are residues that are obtained in the manufacturing and smelting processes of metals, such as steel and copper. However, their use is limited because they may cause environmental problems at their disposal sites. This study aims to evaluate the effects of the addition of slag on the properties of slag-modified asphalts using three different slag proportions (3, 6, and 10% by weight of asphalt). Electric arc furnace slag, blast furnace slag, and copper slag were used to evaluate the effects of the addition of slag on their performance properties via physical and rheological tests. The results showed an improvement in the consistency of the slag-modified asphalts, decreasing the penetration rate and increasing the softening point. An enhancement in the short-term asphalt aging characteristics was also observed with the addition of slag. 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subjects Blast furnace slag
Construction & Building Technology
Copper slag
Electric arc furnace slag
Engineering
Engineering, Civil
Materials Science
Materials Science, Multidisciplinary
Rheological properties
Science & Technology
Slag-modified asphalt
Technology
title Effect of application of metallurgical slag powders on physical and rheological properties of asphalt
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