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相关概念视频

Porosity in Cement Paste01:18

Porosity in Cement Paste

88
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
88

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Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion
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基于MICP技术的管道提升泥混合比率优化的实验研究.

Guangqin Cui1, Hang Zhang2, Chenguang Ma3

  • 1The Inner Mongolia University of Science and Technology School of Civil Engineering, Baotou, 014010, China.

Scientific reports
|December 29, 2024
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概括
此摘要是机器生成的。

微生物诱导的碳酸沉 (MICP) 增强了管道上泥,大大减少了摩擦,改善了土壤的稳定性. 这种创新方法通过填充孔隙的碳酸晶体来加强土壤,提高凝聚力和摩擦角度.

关键词:
承载土壤效应的作用摩擦降低效果的作用在MICP中,MICP是MICP.机械性质 机械性质微观结构的微观结构泥 泥 泥 泥 这是什么?

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科学领域:

  • 地质技术工程 地质技术工程
  • 生物技术是生物技术.
  • 建筑材料科学 建筑材料科学

背景情况:

  • 管道起重工程面临着诸如挖掘卸载和土壤粘附等挑战,影响稳定性.
  • 管道提升泥对于减少摩擦和在道挖掘过程中支层来说至关重要.
  • 现有的泥需要增强,以提高性能和土壤稳定性.

研究的目的:

  • 将微生物诱导的碳酸沉 (MICP) 技术集成到管道提升泥中.
  • 为了增强泥的减少摩擦能力.
  • 在提升操作期间,提高围绕管道的土壤的稳定性.

主要方法:

  • 使用统一的设计确定了最佳的MICP-slurry配方.
  • 进行模型测试,以评估减少摩擦的有效性.
  • 使用土壤力学和扫描电子显微镜 (SEM) 研究了层强化机制.

主要成果:

  • 确定了最佳的MICP-泥组成:本托尼特:碳氧甲基纤维素:苏打灰:聚烯胺:香 = 12%: 0.31%: 0.36%: 0.25%: 0.54%.
  • MICP-泥使摩擦系数减少了42.2%.
  • 通过MICP处理,土壤凝聚力增加了38.12%,内部摩擦角增加了14.01%.

结论:

  • MICP-slurry有效地减少了摩擦,并提高了管道提升中的土壤机械性能.
  • 碳酸沉由MICP填充土壤孔,增加粒子间的力和提高稳定性.
  • 这项技术为提高管道提升施工效率和安全提供了一个有前途的解决方案.