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添加多的托伯莫里特的结构和机械性能

Xiaopeng Li¹, Hongping Zhang^1,2, Haifei Zhan^3,4

¹School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, China.

Nanomaterials (Basel, Switzerland)

|August 26, 2023

概括

在酸水合物 (C-S-H) 中的兴奋剂增强了结构稳定性和机械性能,如压力和剪切阻力. 这项研究揭示了Mg兴奋剂作为优化水泥材料的有希望的策略.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
计算材料科学科学计算材料科学

背景情况:

酸水合物 (C-S-H) 是混凝土中主要的粘合剂,对材料性能至关重要.
了解C-S-H中的杂质元素兴奋剂对于优化水泥材料至关重要.
当前的研究往往忽略了水合酸结构中的兴奋剂机制.

研究的目的:

为了研究 (Mg), (Sr) 和 (Ba) 兴奋剂对代表性C-S-H托伯莫里特结构的影响.
阐明这些杂质元素的兴奋剂机制和结构后果.
评估Mg兴奋剂在增强C-S-H特性方面的潜力.

主要方法:

使用密度函数理论 (DFT) 的计算.
系统地探索对托伯莫里特结构的剂效应.
分析格子体积,协调变化和化学稳定性.

主要成果:

胺兴奋剂降低了晶格体积,改变了-氧多面体协调,需要更高的形成能量.
斯里和巴的兴奋剂主要增加了各自的氧多面体的体积.
用Mg合的结构显示出增强的化学稳定性,更短的原子间结合,以及改善的压力和剪切阻力.

结论:

胺兴奋剂显著影响C-S-H结构,增加化学稳定性和机械强度.
这些发现表明Mg兴奋剂是一种可行的策略,用于结构优化C-S-H.
对Mg化C-S-H的进一步研究可能会导致先进的水泥材料.

关键词:

酸水合物酸水合物密度函数理论密度函数理论兴奋剂的使用兴奋剂的使用机械属性机械属性机械属性结构优化设计结构优化设计托伯莫里特 (托伯莫里特) 是一种多质的物质.

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