Scholarlink

<p>To enhance the high temperature resistance of geopolymer-regenerated mortar (GRM), rice husk ash (RHA), polyimide (PI) fiber, and carbon fiber were incorporated into the GRM matrix. The mechanical properties of the GRM were evaluated at room temperature and high temperatures. The strengthening mechanisms of RHA, PI fiber, and carbon fiber on the mechanical properties of GRM were elucidated through the use of the TGA–DSC, XRD, and SEM techniques. Initially, RHA was incorporated at mass ratios of 5%, 10%, and 15%, respectively, to evaluate its effect on the mechanical properties of GRM at both room temperature and high temperatures of 200&#xa0;°C, 400&#xa0;°C, 600&#xa0;°C, and 800&#xa0;°C. The results indicated that the mechanical properties of GRM were optimized with the addition of 5% RHA at room temperature, while a 10% RHA addition yielded the best results at higher temperatures. Building on these findings, an RHA-based GRM (RGRM) containing 10% RHA was utilized as the matrix. The mechanical properties of PI fibers at volume fractions of 2‰, 3‰, and 4‰, as well as carbon fibers at 3‰, 4‰, and 5‰, were tested at room temperature and after high temperatures, using both single doping and blended doping methods. The experimental results indicated that these fibers enhanced the mechanical properties of RGRM at room temperature, primarily in terms of flexural and splitting tensile strengths, while also increasing the ductility of RGRM. The results of the mechanical properties tests indicate that the optimal contents of PI fiber and carbon fiber are 3‰ and 5‰, respectively. Furthermore, the combination of these fibers demonstrates a more significant impact on the high temperature resistance of RGRM than the use of a single fiber type. </p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on the mechanical properties of rice husk ash-based geopolymer-regenerated mortar reinforced by polyimide fiber and carbon fiber after high-temperature exposure

  • 期刊论文

  • 发表日期：

    2025年5月6日

查看全文
  • Xiaodong Wang,
  • Chuanxi Cheng,
  • Xinzhi Wang,
  • Minggang Sun

摘要

To enhance the high temperature resistance of geopolymer-regenerated mortar (GRM), rice husk ash (RHA), polyimide (PI) fiber, and carbon fiber were incorporated into the GRM matrix. The mechanical properties of the GRM were evaluated at room temperature and high temperatures. The strengthening mechanisms of RHA, PI fiber, and carbon fiber on the mechanical properties of GRM were elucidated through the use of the TGA–DSC, XRD, and SEM techniques. Initially, RHA was incorporated at mass ratios of 5%, 10%, and 15%, respectively, to evaluate its effect on the mechanical properties of GRM at both room temperature and high temperatures of 200 °C, 400 °C, 600 °C, and 800 °C. The results indicated that the mechanical properties of GRM were optimized with the addition of 5% RHA at room temperature, while a 10% RHA addition yielded the best results at higher temperatures. Building on these findings, an RHA-based GRM (RGRM) containing 10% RHA was utilized as the matrix. The mechanical properties of PI fibers at volume fractions of 2‰, 3‰, and 4‰, as well as carbon fibers at 3‰, 4‰, and 5‰, were tested at room temperature and after high temperatures, using both single doping and blended doping methods. The experimental results indicated that these fibers enhanced the mechanical properties of RGRM at room temperature, primarily in terms of flexural and splitting tensile strengths, while also increasing the ductility of RGRM. The results of the mechanical properties tests indicate that the optimal contents of PI fiber and carbon fiber are 3‰ and 5‰, respectively. Furthermore, the combination of these fibers demonstrates a more significant impact on the high temperature resistance of RGRM than the use of a single fiber type.