Scholarlink

<p>Aeolian sand, extensively distributed across Northwest China, is characterized by negligible cohesion and inferior shear strength, posing a significant threat to the long-term stability of transportation infrastructure. In this study, a novel approach utilizing kitchen waste bones as an alternative source of calcium and phosphorus ions was employed to stabilize aeolian sand via soybean urease-induced calcium phosphate compounds precipitation (SICCP). Solution tests were conducted to investigate the influence of the initial pH of the cementation solution and mass concentration of soybean on the on–off behavior of the SICCP reaction and the effective precipitate rate. Subsequently, unconfined compressive strength tests, direct shear tests, and meter-scale sand column model tests were performed to comprehensively analyze the mechanical performance of SICCP-treated aeolian sand, including peak stress ratio, stress–strain response, stress–dilatancy relationship, and coulomb strength parameters. As the thickness of the SICCP-treated specimens increased, the key internal control on mechanical performance shifted from the effective precipitate content to the uniformity of precipitate distribution. Notably, the fluctuation range of the peak stress ratio along the depth of the meter-scale sand column remained within ± 28.3%. Elevated mass concentrations of soybean were found to be detrimental to the deposition and uniform distribution of calcium phosphate compounds; although the resulting soybean protein precipitates exhibited certain bonding capabilities, they concurrently attenuated the frictional resistance between sand particles.</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

Mechanical performance of aeolian sand stabilized with biocement derived from kitchen waste bones

  • 期刊论文

  • 发表日期：

    2026年5月23日

查看全文
  • Yuan Gao,
  • Henghui Fan,
  • Guochong Liu,
  • Guanzhou Ren,
  • Wenbo Ni,
  • Minqiang Meng

摘要

Aeolian sand, extensively distributed across Northwest China, is characterized by negligible cohesion and inferior shear strength, posing a significant threat to the long-term stability of transportation infrastructure. In this study, a novel approach utilizing kitchen waste bones as an alternative source of calcium and phosphorus ions was employed to stabilize aeolian sand via soybean urease-induced calcium phosphate compounds precipitation (SICCP). Solution tests were conducted to investigate the influence of the initial pH of the cementation solution and mass concentration of soybean on the on–off behavior of the SICCP reaction and the effective precipitate rate. Subsequently, unconfined compressive strength tests, direct shear tests, and meter-scale sand column model tests were performed to comprehensively analyze the mechanical performance of SICCP-treated aeolian sand, including peak stress ratio, stress–strain response, stress–dilatancy relationship, and coulomb strength parameters. As the thickness of the SICCP-treated specimens increased, the key internal control on mechanical performance shifted from the effective precipitate content to the uniformity of precipitate distribution. Notably, the fluctuation range of the peak stress ratio along the depth of the meter-scale sand column remained within ± 28.3%. Elevated mass concentrations of soybean were found to be detrimental to the deposition and uniform distribution of calcium phosphate compounds; although the resulting soybean protein precipitates exhibited certain bonding capabilities, they concurrently attenuated the frictional resistance between sand particles.