振动工艺对水泥浆体颗粒分布的影响
Effect of Vibration Procedure on Particle Distribution of Cement Paste.
作者信息
Ke Jia, Shui Zhonghe, Gao Xu, Qi Xibo, Zheng Zihang, Zhang Shaolin
机构信息
International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
出版信息
Materials (Basel). 2023 Mar 24;16(7):2600. doi: 10.3390/ma16072600.
Vibration procedures significantly affect the performances of cement-based materials. However, studies on the distribution of certain particles within cement-based materials are limited due to the complexity and difficulty of identifying each specific particle. This paper presents a new method for simulating and quantifying the movements of particles within cement paste through the use of "tagged materials". By separating the tagged particles from the cement paste after vibration, the distribution of the particles in the cement paste can be calculated statistically. The effect of the vibration time and frequency, fresh behavior, and powder characteristics of cement paste on particle motions are investigated. The results demonstrate that when the vibration exceeds 1800 s, it induces a significant uneven dispersion of microparticles. This effect is more pronounced at low viscosities (<1 Pa·s) of cement paste or high vibration frequencies (>200 Hz). Larger and denser particles exhibit greater dispersion. This method provides a valuable tool for investigating the theory of particle motion in cement paste, which is crucial for understanding the influence of vibration on the properties of cement-based materials.
振动过程对水泥基材料的性能有显著影响。然而，由于识别每种特定颗粒的复杂性和难度，关于某些颗粒在水泥基材料中的分布的研究有限。本文提出了一种通过使用“标记材料”来模拟和量化水泥浆体中颗粒运动的新方法。通过在振动后将标记颗粒从水泥浆体中分离出来，可以统计计算颗粒在水泥浆体中的分布。研究了振动时间和频率、水泥浆体的新拌性能以及粉末特性对颗粒运动的影响。结果表明，当振动超过1800秒时，会导致微粒显著不均匀分散。在水泥浆体低粘度（<1 Pa·s）或高振动频率（>200 Hz）时，这种影响更为明显。更大、更密实的颗粒表现出更大的分散性。该方法为研究水泥浆体中颗粒运动理论提供了一个有价值的工具，这对于理解振动对水泥基材料性能的影响至关重要。
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