Scholarlink

<p>The construction of a basic lunar research station is a core task of the Lunar Prospecting IV Project of China. Lunar soil-based geopolymer is recognized as a superior raw material for the construction of space bases; however, it suffers from defects such as low strength, brittleness, and susceptibility to cracking, making it unsuitable for meeting the technical requirements of building materials for lunar space stations. To address this, polypropylene fiber (PPF) was added to the simulated lunar soil-based geopolymer to investigate the effects of PPF length and dosage on its workability, compressive strength, flexural strength, and flexural toughness, with the underlying mechanisms analyzed through scanning electron microscopy. The experimental results showed that the geopolymer’s fluidity decreased as PPF length and dosage increased, with the 9 mm PPF length having a greater effect on mortar fluidity. An appropriate amount of PPF doping effectively enhanced the compressive strength, flexural strength, and bending toughness of the geopolymer, with the greatest improvements observed at a PPF length of 6 mm and a doping amount of 0.4 wt.%, yielding increases of 54.6, 117.7, and 90%, respectively. Additionally, comprehensively considering the coupled relationships among fiber length, dosage, and midspan deflection, using the bending toughness coefficient to quantify the toughening effect of different fiber length, the effectiveness of the three fibers length in toughening the simulated lunar soil geopolymer ranks as follows: 6&#xa0;mm &gt; 9&#xa0;mm &gt; 3&#xa0;mm. The addition of PPF significantly improved the mechanical properties of the simulated lunar soil geopolymer, providing a reference for selecting construction materials for future lunar bases.</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

Experimental Investigation into the Mechanical Properties, Flexural Toughness, and Failure Mechanism of Polypropylene Fiber-Reinforced Simulated Lunar Soil Geopolymer

  • 期刊论文

  • 发表日期：

    2025年8月13日

查看全文
  • Siyuan Meng,
  • Liqing Li,
  • Shuangxi Feng

摘要

The construction of a basic lunar research station is a core task of the Lunar Prospecting IV Project of China. Lunar soil-based geopolymer is recognized as a superior raw material for the construction of space bases; however, it suffers from defects such as low strength, brittleness, and susceptibility to cracking, making it unsuitable for meeting the technical requirements of building materials for lunar space stations. To address this, polypropylene fiber (PPF) was added to the simulated lunar soil-based geopolymer to investigate the effects of PPF length and dosage on its workability, compressive strength, flexural strength, and flexural toughness, with the underlying mechanisms analyzed through scanning electron microscopy. The experimental results showed that the geopolymer’s fluidity decreased as PPF length and dosage increased, with the 9 mm PPF length having a greater effect on mortar fluidity. An appropriate amount of PPF doping effectively enhanced the compressive strength, flexural strength, and bending toughness of the geopolymer, with the greatest improvements observed at a PPF length of 6 mm and a doping amount of 0.4 wt.%, yielding increases of 54.6, 117.7, and 90%, respectively. Additionally, comprehensively considering the coupled relationships among fiber length, dosage, and midspan deflection, using the bending toughness coefficient to quantify the toughening effect of different fiber length, the effectiveness of the three fibers length in toughening the simulated lunar soil geopolymer ranks as follows: 6 mm > 9 mm > 3 mm. The addition of PPF significantly improved the mechanical properties of the simulated lunar soil geopolymer, providing a reference for selecting construction materials for future lunar bases.