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<p>In order to achieve green production of cement and resource utilization of solid wastes, this article prepared a novel type of high belite sulfoaluminate cement with internal residual gypsum (NHBSAC) using industrial solid waste such as petroleum coke ash. Based on RSM method, XRD, and other testing techniques, the optimal calcination system and hydration mechanism of NHBSAC were explored. The results showed that NHBSAC with a solid waste utilization rate of up to 80% was successfully prepared using the above-mentioned solid waste. The mineral composition of its clinker was <InlineEquation ID="IEq100"> <EquationSource Format="TEX">\({\text{C}_{4}{\text{A}_{3}}}{\overline{\text{S}}}\text{-}{\text{C}_{2}{\text{S}}}{\text{-}}{\text{CaSO}_4}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <msub> <mtext>C</mtext> <mn>4</mn> </msub> <msub> <mtext>A</mtext> <mn>3</mn> </msub> </mrow> <mover> <mtext>S</mtext> <mo>¯</mo> </mover> <mtext>-</mtext> <mrow> <msub> <mtext>C</mtext> <mn>2</mn> </msub> <mtext>S</mtext> </mrow> <mtext>-</mtext> <msub> <mtext>CaSO</mtext> <mn>4</mn> </msub> </mrow> </math></EquationSource> </InlineEquation>, and the optimal calcination system was 1300&#xa0;℃-24&#xa0;min. Moreover, compared with externally added gypsum, residual gypsum exhibits better hydration properties. The hydration models of HBSAC and NHBSAC were established to analyze the reaction process of gypsum in clinker. The residual gypsum in NHBSAC undergoes “in situ reaction” with other minerals, making it easier to form high-strength hydration products such as AFt.</p> Graphical Abstract <p></p>

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Research on Solid Waste-based High Belite Sulfoaluminate Cement: RSM-Optimized Preparation and Properties Evaluation

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Dunlei Su,
  • Jiahui Wang,
  • Qiuyi Li,
  • Fengyuan Dong,
  • Dejin Xing,
  • Mingxin Yang,
  • Gongbing Yue

摘要

In order to achieve green production of cement and resource utilization of solid wastes, this article prepared a novel type of high belite sulfoaluminate cement with internal residual gypsum (NHBSAC) using industrial solid waste such as petroleum coke ash. Based on RSM method, XRD, and other testing techniques, the optimal calcination system and hydration mechanism of NHBSAC were explored. The results showed that NHBSAC with a solid waste utilization rate of up to 80% was successfully prepared using the above-mentioned solid waste. The mineral composition of its clinker was \({\text{C}_{4}{\text{A}_{3}}}{\overline{\text{S}}}\text{-}{\text{C}_{2}{\text{S}}}{\text{-}}{\text{CaSO}_4}\) C 4 A 3 S ¯ - C 2 S - CaSO 4 , and the optimal calcination system was 1300 ℃-24 min. Moreover, compared with externally added gypsum, residual gypsum exhibits better hydration properties. The hydration models of HBSAC and NHBSAC were established to analyze the reaction process of gypsum in clinker. The residual gypsum in NHBSAC undergoes “in situ reaction” with other minerals, making it easier to form high-strength hydration products such as AFt.

Graphical Abstract