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One-Week Hydration Characteristics of Silica-Alumina Based Cementitious Materials Composed of Phosphorous Slag: Phosphorus Involved in Calcium Alumino-Silicate Hydrate Gel.

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Title: One-Week Hydration Characteristics of Silica-Alumina Based Cementitious Materials Composed of Phosphorous Slag: Phosphorus Involved in Calcium Alumino-Silicate Hydrate Gel.
Authors: Li, Zipei1 (AUTHOR), Wang, Yu1,2 (AUTHOR), Zhang, Jiale1,3 (AUTHOR), Wang, Yipu1 (AUTHOR), Zhang, Na1,2 (AUTHOR), Liu, Xiaoming2,3 (AUTHOR), Sun, Yinming3 (AUTHOR)
Source: Materials (1996-1944). Jul2025, Vol. 18 Issue 14, p3360. 23p.
Subjects: Ettringite, Cement, Resource allocation, Moisture, Calcium silicate hydrate, Sustainability, Phosphoric acid, Cement composites
Abstract: Phosphorous slag is an industrial by-product generated in the process of producing yellow phosphorus by electric furnace, which occupies a substantial number of land resources and causes serious environmental pollution. The comprehensive utilization of phosphorous slag is a major topic relevant to the sustainability of the yellow phosphorus industry. In this paper, we attempted to utilize phosphorous slag as a supplementary cementing material to prepare silica-aluminum based cementitious material (SAC-PHS). To determine how phosphorus influences the early-age hydration reaction process of silica-aluminum based cementitious material, three groups of samples, PHS20, PHS25, and PHS30, with better mechanical properties were selected to deeply investigate their one-week hydration characteristics. Characterization results showed that the main hydration products of SAC-PHS were C-A-S-H gels and ettringite. PHS25 specimen produced more C-A-S-H gels and ettringite than the other two samples after one-week hydration. Interestingly, the P/Si atomic ratio indicated that chemical bonds were formed between Si and P during the formation of C-A-S-H gels, which improved the strength of SAC-PHS. Our findings offer valuable insights for the application of phosphorous slag in construction and building materials and promote the efficient resource utilization of phosphorous residue. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: One-Week Hydration Characteristics of Silica-Alumina Based Cementitious Materials Composed of Phosphorous Slag: Phosphorus Involved in Calcium Alumino-Silicate Hydrate Gel.
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jul2025, Vol. 18 Issue 14, p3360. 23p.
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  Data: <searchLink fieldCode="DE" term="%22Ettringite%22">Ettringite</searchLink><br /><searchLink fieldCode="DE" term="%22Cement%22">Cement</searchLink><br /><searchLink fieldCode="DE" term="%22Resource+allocation%22">Resource allocation</searchLink><br /><searchLink fieldCode="DE" term="%22Moisture%22">Moisture</searchLink><br /><searchLink fieldCode="DE" term="%22Calcium+silicate+hydrate%22">Calcium silicate hydrate</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainability%22">Sustainability</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphoric+acid%22">Phosphoric acid</searchLink><br /><searchLink fieldCode="DE" term="%22Cement+composites%22">Cement composites</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Phosphorous slag is an industrial by-product generated in the process of producing yellow phosphorus by electric furnace, which occupies a substantial number of land resources and causes serious environmental pollution. The comprehensive utilization of phosphorous slag is a major topic relevant to the sustainability of the yellow phosphorus industry. In this paper, we attempted to utilize phosphorous slag as a supplementary cementing material to prepare silica-aluminum based cementitious material (SAC-PHS). To determine how phosphorus influences the early-age hydration reaction process of silica-aluminum based cementitious material, three groups of samples, PHS20, PHS25, and PHS30, with better mechanical properties were selected to deeply investigate their one-week hydration characteristics. Characterization results showed that the main hydration products of SAC-PHS were C-A-S-H gels and ettringite. PHS25 specimen produced more C-A-S-H gels and ettringite than the other two samples after one-week hydration. Interestingly, the P/Si atomic ratio indicated that chemical bonds were formed between Si and P during the formation of C-A-S-H gels, which improved the strength of SAC-PHS. Our findings offer valuable insights for the application of phosphorous slag in construction and building materials and promote the efficient resource utilization of phosphorous residue. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma18143360
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        Text: English
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        PageCount: 23
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      – SubjectFull: Ettringite
        Type: general
      – SubjectFull: Cement
        Type: general
      – SubjectFull: Resource allocation
        Type: general
      – SubjectFull: Moisture
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      – SubjectFull: Calcium silicate hydrate
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      – SubjectFull: Phosphoric acid
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      – SubjectFull: Cement composites
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    Titles:
      – TitleFull: One-Week Hydration Characteristics of Silica-Alumina Based Cementitious Materials Composed of Phosphorous Slag: Phosphorus Involved in Calcium Alumino-Silicate Hydrate Gel.
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              M: 07
              Text: Jul2025
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              Y: 2025
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