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Deleterious Substances in Aggregate01:25

Deleterious Substances in Aggregate

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Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
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高强度耐侵蚀水凝砂固定剂

Zhiwei Xu1, Zhimin Gou1, Zhihao Chen1

  • 1School of Materials Science and Engineering, Ludong University, Yantai 264025, China.

Langmuir : the ACS journal of surfaces and colloids
|January 14, 2026
PubMed
概括

这项研究引入了一种新的水凝砂固定剂,可以创建强大,耐用的沙柱. 这种环保材料为沙漠基础设施和生态工程提供了可持续的解决方案.

科学领域:

  • 材料科学 材料科学 材料科学
  • 环境工程 环境工程
  • 地质技术工程 地质技术工程

背景情况:

  • 传统的水凝在灵活性和结构稳定性方面存在局限性.
  • 这些局限性阻碍了在恶劣的沙漠条件下,如高温和盐侵蚀的性能.
  • 现有的解决方案无法满足沙漠基础设施的长期耐用性要求.

研究的目的:

  • 开发一种高强度,耐侵蚀的水凝砂固剂.
  • 为了实现高效和可持续的无水泥地带地质沙子固定.
  • 在干燥环境和多种压力下创建稳定的材料.

主要方法:

  • 纳入甲基组以增强分子链的刚性.
  • 在各种条件下测试沙柱的压力强度和稳定性.
  • 评估暴露于酸性/性环境和干燥后的强度恢复.

主要成果:

  • 沙柱实现了超高的压力强度 (高达54.3MPa),超过商业C30混凝土.
  • 在极端条件下保持高稳定性,包括酸性/性环境和干燥.
  • 在环境压力因素后,观察到强度恢复到超过50 MPa.

结论:

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  • 开发的水凝是一种适用于沙漠环境的低碳工程材料.
  • 它为沙漠资源利用和生态工程提供了创新的解决方案.
  • 该材料展示了沙子固定和基础设施的广泛应用前景.