Scholarlink

<p>The high organic composition of peat poses significant geotechnical challenges, including low shear strength, a highly compressible nature, and substantial creep rates. However, geopolymer, a nontraditional material, offers a promising solution for stabilizing peat, increasing strength, and reducing carbon dioxide (CO<sub>2</sub>) emissions. This study explores the application of fly ash-based geopolymer (FAGP) as a stabilization agent for peat, which exhibits highly variable organic content (17–72%) and fiber content (5–69%). The geopolymer was prepared using sodium hydroxide and fly ash (FA) at varying molarity (M), alkali/binder (L/S) ratios, and binder dosages. The results show that peat stabilization is influenced by various factors such as organic content (OC), binder dosage, activator concentration, L/S ratio, pH, and curing period. Optimal combinations were identified as 20% binder dosage, 12&#xa0;M activator concentration, and 0.7&#xa0;L/S ratio, yielding significant improvements in unconfined compressive strength (UCS)—184, 225, and 167 times higher than untreated hemic (7.18&#xa0;kPa), fibric (8.35&#xa0;kPa), and sapric (12.53&#xa0;kPa) peat, respectively. Additionally, UCS decreased with increasing organic content and increased with the curing period. Further, X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analysis confirmed the successful synthesis of cementitious materials, including zeolite, which filled pore spaces, supporting the proposed reaction mechanism.</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

Fly Ash-Based Geopolymer Stabilized Peat: Experimental Investigation

  • 期刊论文

  • 发表日期：

    2026年1月13日

查看全文
  • Vishal Raghuwanshi,
  • Monowar Hussain

摘要

The high organic composition of peat poses significant geotechnical challenges, including low shear strength, a highly compressible nature, and substantial creep rates. However, geopolymer, a nontraditional material, offers a promising solution for stabilizing peat, increasing strength, and reducing carbon dioxide (CO2) emissions. This study explores the application of fly ash-based geopolymer (FAGP) as a stabilization agent for peat, which exhibits highly variable organic content (17–72%) and fiber content (5–69%). The geopolymer was prepared using sodium hydroxide and fly ash (FA) at varying molarity (M), alkali/binder (L/S) ratios, and binder dosages. The results show that peat stabilization is influenced by various factors such as organic content (OC), binder dosage, activator concentration, L/S ratio, pH, and curing period. Optimal combinations were identified as 20% binder dosage, 12 M activator concentration, and 0.7 L/S ratio, yielding significant improvements in unconfined compressive strength (UCS)—184, 225, and 167 times higher than untreated hemic (7.18 kPa), fibric (8.35 kPa), and sapric (12.53 kPa) peat, respectively. Additionally, UCS decreased with increasing organic content and increased with the curing period. Further, X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analysis confirmed the successful synthesis of cementitious materials, including zeolite, which filled pore spaces, supporting the proposed reaction mechanism.