对玻璃酸的溶解动力学进行拓控制
Tandré Oey1, Aditya Kumar1, Isabella Pignatelli1
1Laboratory for the Chemistry of Construction Materials (LC), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA.
Journal of the American Ceramic Society. American Ceramic Society
|October 25, 2024
概括
了解飞灰反应性是增加其在混凝土中的使用的关键. 这项研究表明,玻璃式飞灰的原子结构控制了其溶解率,为预测其性能提供了一种新方法.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 地质化学 地质化学
背景情况:
- 飞灰是一种常见的补充水泥材料 (SCM),用于替代混凝土中的普通波特兰水泥 (OPC).
- 由于经济和环境原因,更高的OPC与飞的替代水平是可取的.
- 量化飞灰反应性对于优化其在混凝土中的使用至关重要.
研究的目的:
- 调查控制飞灰中玻璃状部分反应性的因素.
- 建立原子结构与飞灰溶解率之间的关系.
- 开发一个框架来预测混凝土中的飞灰-水泥相互作用.
主要方法:
- 利用分子动力学 (MD) 模拟来建模飞灰的原子结构.
- 使用垂直扫描干扰仪 (VSI) 来测量水溶速率.
- 分析了酸网络中的原子的拓约束.
主要成果:
- 飞灰的反应性,特别是其水性溶解率,是由玻璃状酸盐网络中原子的约束数量决定的.
- 在溶解速率和原子网络拓学之间观察到类似阿雷尼乌斯关系.
- 这种拓控制在各种不同成分的美国商业灰中得到了证明.
结论:
- 玻璃式飞灰的原子结构或拓学决定了它与水的反应性.
- 这一发现提供了一个结构-属性关系,以更好地控制和估计混凝土中的飞灰性能.
- 这项研究为在混凝土中使用飞灰作为SCM提供了一个改进的框架.
相关概念视频
02:28Intermolecular Forces in Solutions
33.1K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
33.1K
01:59Solution Equilibrium and Saturation
18.5K
Imagine adding a small amount of sugar to a glass of water, stirring until all the sugar has dissolved, and then adding a bit more. You can repeat this process until the sugar concentration of the solution reaches its natural limit, a limit determined primarily by the relative strengths of the solute-solute, solute-solvent, and solvent-solvent attractive forces. You can be certain that you have reached this limit because, no matter how long you stir the solution, undissolved sugar remains. The...
18.5K