含添加剂金属-水泥复合材料的研究

V. Mironov, I. Pundienė, A. Tatarinov, J. Baroninsh
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引用次数: 5

摘要

小型金属填料(SMF)的应用为水泥基复合材料提供了高容重、高耐久性和铁磁性能的组合。然而,复合材料的总强度可能会受到金属颗粒与水泥基体粘合不良的影响。使用微二氧化硅和偏高岭土等多功能添加剂能够改善重质混凝土的结构完整性和机械性能。本文考虑了一项使用SMF的重混凝土试件的研究结果,旨在估计其强度,结构特征和超声参数。结果表明,在水泥水化过程(放热反应)中,SMF颗粒与水泥基体之间出现空隙,导致SMF颗粒与水泥的接触并不完美。由于边界孔隙的存在,金属填料试样的抗压强度降低,超声速度降低,衰减频率斜率增大。微二氧化硅和偏高岭土添加剂促进了水泥基体与金属填料之间更好的接触区。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Study of Metal-Cement Composites with Additives
Abstract The application of small-sized metal fillers (SMF) provides a combination of high bulk density, increased durability and ferromagnetic properties of composite materials on the cement basis. However, the total strength of the composite can be compromised by poor adhesion of metal particles with the cement matrix. The use of versatile additives like microsilica and metakaolin is able to improve the structural integrity and mechanical properties of heavy concretes. The paper considers the results of a study using specimens of heavy concretes with SMF aiming to estimate its strength, structural features and ultrasonic parameters. It was found that the contact of SMF particles with the cement was not perfect, since the voids appeared between them and the cement matrix during the cement hydration process (exothermal reaction). Due to the border porosity, the specimens with the metal fillers have lower compressive strength, lower ultrasound velocity and increased frequency slope of attenuation. Microsilica and metakaolin additives facilitate better contact zone between the cement matrix and metal fillers.
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