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Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture

This study introduced phosphogypsum coupled with steel slag powder to prepare the phosphogypsum based filler (PF) for asphalt mixture. Penetration, penetration index, softening point, ductility, equivalent softening point, moisture stability of asphalt mortars with different steel slag powder conten...

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Autores principales: Wan, Jiuming, Han, Tao, Li, Kaifei, Shu, Suxun, Hu, Xiaodi, Gan, Wenxia, Chen, Zongwu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10057420/
https://www.ncbi.nlm.nih.gov/pubmed/36984366
http://dx.doi.org/10.3390/ma16062486
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author Wan, Jiuming
Han, Tao
Li, Kaifei
Shu, Suxun
Hu, Xiaodi
Gan, Wenxia
Chen, Zongwu
author_facet Wan, Jiuming
Han, Tao
Li, Kaifei
Shu, Suxun
Hu, Xiaodi
Gan, Wenxia
Chen, Zongwu
author_sort Wan, Jiuming
collection PubMed
description This study introduced phosphogypsum coupled with steel slag powder to prepare the phosphogypsum based filler (PF) for asphalt mixture. Penetration, penetration index, softening point, ductility, equivalent softening point, moisture stability of asphalt mortars with different steel slag powder content, filler-asphalt ratio, and PF content were studied. Mechanical properties of PF based asphalt mortar (P-AM) were then analyzed to determine the optimum steel slag content in PF. Overall desirability method was used to determine the optimum replacement ratio of PF content in limestone filler. Rheological properties of P-AM were also analyzed through dynamic shear rheometer. Volumetric performance, high-temperature performance, low-temperature performance, and moisture stability tests were carried out on PF based AC-20 asphalt mixture. Results showed that P-AM presented the optimum performance when the content of steel slag powder was 23% by mass of phosphogypsum. Fatigue and rutting factor of asphalt mortar were enhanced by PF. The optimum PF content in replacing limestone filler was 75% through overall desirability evaluation. PF developed the high-temperature performance and moisture stability of asphalt mixture. Additionally, volumetric and low-temperature performance were not significantly affected by PF. It is suggested that using PF which is based on phosphogypsum as a filler of asphalt mixture to partially replace traditional limestone filler was adequate.
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spelling pubmed-100574202023-03-30 Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture Wan, Jiuming Han, Tao Li, Kaifei Shu, Suxun Hu, Xiaodi Gan, Wenxia Chen, Zongwu Materials (Basel) Article This study introduced phosphogypsum coupled with steel slag powder to prepare the phosphogypsum based filler (PF) for asphalt mixture. Penetration, penetration index, softening point, ductility, equivalent softening point, moisture stability of asphalt mortars with different steel slag powder content, filler-asphalt ratio, and PF content were studied. Mechanical properties of PF based asphalt mortar (P-AM) were then analyzed to determine the optimum steel slag content in PF. Overall desirability method was used to determine the optimum replacement ratio of PF content in limestone filler. Rheological properties of P-AM were also analyzed through dynamic shear rheometer. Volumetric performance, high-temperature performance, low-temperature performance, and moisture stability tests were carried out on PF based AC-20 asphalt mixture. Results showed that P-AM presented the optimum performance when the content of steel slag powder was 23% by mass of phosphogypsum. Fatigue and rutting factor of asphalt mortar were enhanced by PF. The optimum PF content in replacing limestone filler was 75% through overall desirability evaluation. PF developed the high-temperature performance and moisture stability of asphalt mixture. Additionally, volumetric and low-temperature performance were not significantly affected by PF. It is suggested that using PF which is based on phosphogypsum as a filler of asphalt mixture to partially replace traditional limestone filler was adequate. MDPI 2023-03-21 /pmc/articles/PMC10057420/ /pubmed/36984366 http://dx.doi.org/10.3390/ma16062486 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wan, Jiuming
Han, Tao
Li, Kaifei
Shu, Suxun
Hu, Xiaodi
Gan, Wenxia
Chen, Zongwu
Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture
title Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture
title_full Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture
title_fullStr Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture
title_full_unstemmed Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture
title_short Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture
title_sort effect of phosphogypsum based filler on the performance of asphalt mortar and mixture
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10057420/
https://www.ncbi.nlm.nih.gov/pubmed/36984366
http://dx.doi.org/10.3390/ma16062486
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